Exactly what does this mean? KtG is correct that it should be in the 20 - 40 in-lb range for an assembled diff. Clean the oil seal mounting surface and tap the new seal in place 7 Inspect the splines for burrs and nicks. It will have to have a needle or a dial to do this, the click kind will not work. Axle builders generally measure the pinion’s preload by rotating the pinion gear by its nut with a pound/inch-graduated torque wrench. My question is how can I set the preload in the car with the exhaust pipes surrounding the pinion nut? We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done. When going through the tool list they recommend using a dial torque wrench to set pinion bearing preload. Not any easy job by any stretch... but well within the capability of an experienced home mechanic. I measured the original sleeve and found one sleeve was really close and the other quite a bit shorter so I added the appropriate amount of shims to match the original for a starting point. This wear can cause enough pre-load to be lost that the pinion will actually move when torque is applied or removed to the pinion via the driveshaft under engine acceleration or deceleration. Now my question is since most click type torque wrenches and a few other brand dial torque wrenches say their best accuracy is between 20 and 100% of the torque range would i be able to use this particular one 3/8 DR 150 IN LB DIAL TQ WRNCH Matco dial torque wrenches offer precise torque … This is why I think the mechanic is correct, I don't think I got the preload right. You could pull the flange back to set the preload again with the nut, but I would just apply a generous amount of torque to the nut again without disturbing the flange. I believe this means to tighten pinion nut til correct preload is reached indicated by torque required to turn the pinion, which you measured prior to disassembling. If not, repeat until it is. I will be pulling all the stock bearings off and making setup bearing out of them, i have new bearings to go in, I will see what I can do and let you all know what happens. I cant seem to locate an inch pound torque wrench that measures low enough to set the preload, all the ones that I can get locally start at 30 inch pounds and most start above 100.has any one set their preload without using a torque wrench. Gradually tighten the pinion nut in increments to a final value of approximately 250 ft.-lbs. Ford 8" IRS: 14 to 19 in-lbs. Install new pinion bearing cups with Pinion Bearing Cup Replacer. Having done my share of GM diff's I always use an inch torque wrench. The risk of going back with torque as low as 55lb ft is that it may allow the flange or the front pinion bearing race to back off of the pinion gear a little and reduce preload once you start driving again. second time ever doing gears, first was the rear end and it turned out ok... having a little trouble here. At Randy’s, our service shop uses a 1/2” breaker bar, as shown in illustration 1A. lbs.) inch-pound torque wrench to check the preload. Make sure you have a factory manual for procedure. Using a suitable tool to hold the pinion flange and remove the pinion nut 5. Copyright © 2020 vBulletin Solutions, Inc. All rights reserved. Well I'm installing my third set of gears but I've always had access to a pinion depth gauge tool, now I do not. lb. I installed the new yoke and ran the pinion nut down with the impact wrench. When setting the pinion bearing preload on a crush sleeve design differential, it is always necessary to use a new crush sleeve every time the pinion nut is removed, or if the sleeve is over-crushed. Make sure to put some loctite on the threads! Adjusting pinion bearing preload is necessary to make sure the conical bearings that support it are seated and positioned correctly. Install the front bearing over the splined end of the gear. I have it to where it takes about 25 in lbs to get it turning and then it mellows out to about 10 in lbs. I always set pinion preload by "feel", Im doing an 8.8 now and I decided to buy a good inch pound torque wrench. Pinion bearing preload positions the bearings such that the pinion gear is held firmly in place, but still allows smooth rotation of the gear. Pinion bearing preload is measured in inch-pounds and is a measure of the rolling resistance of the pinion bearings after proper torque has been applied to the pinion nut. The reason we do this is because as you accelerate, the pinion wants to make the ring gear deflect. Either use short controlled blasts with impact wrench or turn the pinion nut a small amount using the rachet/pipe wrench combo. CAUTION: If maximum tightening torque of 271 N•m (200 ft. Most are 1/4 drive so you will probably have to have a couple adapters to get to your socket size. Yes some people can feel the rotating force it takes to rotate the pinion gear however there is not a lot of difference in the amount the nut turns to go from the 15"/lb to the 25"/lb and then to have the bearings a little too tight. It is very low and my torque wrench … Start with the pinion shim that was on the original pinion and work from there. .011" to .016" 60 ft-lbs. It's not like a dana set up where you use shims to set the preload and the torque on the nut is always the same value (175 ft/lbs for a D60 if I remember correctly). for bearing preload. Never loosen pinion gear nut to decrease pinion gear bearing rotating torque and never exceed specified preload torque. Pinion Preload (New) Pinion Preload (Reused) Ring Gear Backlash: Ring Gear Bolt Torque: Carrier Bearing Cap Bolts : Ford 7.5" 14 to 19 in-lbs. That fact represents the torque multiplication for that particular gear set. If it is correct, move on. I unbolted it before checking the preload with the torque wrench, but I'm kind of anal about stuff like that. 9. Most people recommend a beam type torque wrench because its much easier to read the tourqe when the pinion starts to turn. If a 0.038 mm (0.0015-inch) feeler gauge can be inserted between pinion bearing cup and the bottom of its bore at any point around the pinion bearing cup, the pinion bearing cup is not properly seated. The crush sleeve keeps the bearings apart a set distance. Failure to follow these instruction may result in damage. High/low, heel/toe. As the pinion nut is tightened it forces the yoke against a "crush sleeve" (red) that is designed to "control" collapse under force. This is adjusted by adding or subtracting shims located between pinion bearings (more shim = less preload) alternatively set by tightening nut with a crush sleeve in place, collapsing it until desired preload is achieved. Again, use an inch-pound torque wrench to check the preload. That means that to properly set the pinion bearing preload, you need to put that amount of force onto the pinion nut. Target is 28 in-lbs of rotational resistance for a unit on the bench with ring gear and posi installed, cover installed and the well filled with oil. I have a pinion depth tool, but almost never use it. The idea is that the preload on the pinion bearings is set whilst the main part of the diff is removed from the axle casing. 8 to 10 in-lbs. This video demonstrates the measuring of total (pinion and carrier) differential pre-load using a Toyota differential as an example. The only other 'special' tools you absolutely need is a 0-60 inch/lbs dial or beam type torque wrench to check the critical pinion bearing preload, and a dial indicator to check the ring gear backlash. Is it possible to just tweek the nut ever so slightly without removing everything and see if the "coast whine" is gone? So, after it starts to deform, do I set the torque wrench to 16 in/lbs and try to tighten the nut. Axles generally use crush sleeves or shims to set pinion preload. All Rights reserved. Never overtighten (exceed the preload). To measure and adjust drive pinion preload, follow the steps in Skill Drill 26-18: 1 Reinstall the pinion into the housing with a new bearing, making sure to install the crush sleeve, if equipped. inch-pound torque wrench to check the preload. The pinion rotates and drives the ring gear. Reinstall the nut and washer. The slack would leave the pinion bearings with little or no preload. I think what you need to do is tighten the pinion nut to below 180Nm and check the torque needed to rotate the whole assembly and keep on trying until you get to your recorded torque for rotating the assembly. Remember that there are different preload values for new bearings vs. used bearings. The only other 'special' tools you absolutely need is a 0-60 inch/lbs dial or beam type torque wrench to check the critical pinion bearing preload, and a dial indicator to check the ring gear backlash. The pinion bearing preload is related to the amount of force the pinion nut exerts on the pinion and its bearings. Learn more about us. The correct torques should be between 2-4 inch pounds (not less than 2 nor more than 4). According to the Dana literature 20-40 in.lb. Pinion bearing preload is measured in inch-pounds and is a measure of the rolling resistance of the pinion bearings after proper torque has been applied to the pinion nut. It is perfectly normal to have 150-200 ft lbs of torque on the side adjusters. Register for the world’s largest manufacturing technology forum for free today to stay in the know. This website or its third-party tools process personal data (e.g. Once the companion flange feels snug, turn the pinion nut in 1/8 inch increments, and then with each turn, check the turning tension with an inch-pound torque wrench. 7) Use some adapters, and match that inch-lb torque wrench up to a socket that fits over the pinion nut. When the axle is set up during initial building, the pinion/flange nut is tightened until the resistance required to turn the flange is 30 to 40 lbs inch without the crownwheel assembly fitted. All Rights Reserved. Pinion pre-load is lost gradually over the life of the differential as the bearings and or race wears with use. Check the preload using an inch-pound torque wrench or pull scale, looking for the correct specification. You can still do it with a clicker with a trick. You can tighten the nut in fairly big chunks until you get most of the play out of the pinion gear, but when you start getting close to zero play on the bearings, SLOW DOWN. So in doing this, I only have the test bearings on the pinion right now and no crush sleeve and am setting the preload. 60 ft-lbs. The tapered bearings are adjusted to eliminate any play and then they are set a little tighter, making them a little "hard to turn". Check the pinion bearing preload using the inch pound bar type torque wrench after each short blast with the impact wrench or small turn with the rachet and pipe wrench… Determine the problem and replace damaged or worn parts. If you cannot get it to the right spec and stay within 5 degrees of the mark, helms recommends rebuilding the diff. is reached before torque to rotate is achieved, the collapsible spacer may have been damaged. The pinion nut should be torqued to 8-14 in-lbs. Torque the nut to the manufacturer’s specifications. When I set the pinion bearing preload on the D44A I just set up I used a little craftsman clicker type and a handfull of adapters. .010" to .015" 60 ft-lbs. When replacing a pinion seal on one I blip the flange nut very slightly with my 1/2" impact gun. I could feel it bottom and gave it a few more hits with the impact. Anyone have a tip on how to measure this torque? If you are installing used pinion bearings 10-15 in. In my 3.73 ratio case, when the pinion gear is rotated 3.73 times, the ring gear rotates 1.00 time. lbs.) Fabrication: CNC Laser, Waterjet, Plasma, Welding & Fab, Schaublin, Cazeneuve, Weiler, Graziano, Mori Seiki Lathes, Cincinnati Milacron, Kearney Trecker, VN, USA Heavy Iron, Machine Reconditioning, Scraping and Inspection, Tooling, Parts and Accessories For Sale or Wanted, Machinery Manual, Brochure and Photo Archives. Too little preload will cause the carrier to move back and forth. 5. © 2020 Copyright Practicalmachinist.com. The pinion rotates and drives the ring gear. When setting the pinion bearing preload on a crush sleeve design differential, it is always necessary to use a new crush sleeve every time the pinion nut is removed, or if the sleeve is over-crushed. The funny thing about preload is I don't believe there is … Too much bearing preload will kill the bearings almost instantly. Reinstall the pinion seal using the manufacturer recommended tool. Pry out the oil seal 6. When installing the carrier, the same adjusters or shims that are used to adjust the backlash are also used to set the carrier bearing preload. I'm going from 3.55's to 4.30's. Keep this up until you have reached the pinion preload torque specified in the instructions with your kit. Inch-pound torque wrench – needed for reading pinion-bearing preload. The easiest way to set your preload on any differential is with an inch/lbs torque wrench. I have the inch-pound torque wrench. It takes considerable torque to turn the pinion nut, and it can be tricky towards the end. Jones & Bartlett Learning, LLC, an Ascend Learning Company. Foot-pound torque wrench - you need one capable of reading at least 250 ft-lbs for torquing the pinion nut, which affects pinion-bearing preload. 60 ft-lbs. The forces on the pinion gear are tremendous in that the driveshaft, which is connected to it, transmits the power to the pinion gear then to the ring gear and then to the axles and tires. Torque-set. You can still do it with a clicker with a trick. Many air-impact wrenches are not capable of this kind of torque; you need at least a 1/2-inch-drive impact, if not a 3/4-drive unit. Reinstall the pinion into the housing with a new bearing, making sure to install the crush sleeve, or shims. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Pinion bearing preload positions the bearings such that the pinion gear is held firmly in place, but still allows smooth rotation of the gear. I checked the pinion torque to rotate again and it was about the same. Pinion Preload (New) Pinion Preload (Reused) Ring Gear Backlash: Ring Gear Bolt Torque: Carrier Bearing Cap Bolts : AAM 9.25" 15 to 25 in-lbs. Using an inch pound torque wrench, measure and record the torque required to turn the pinion nut through several revolutions 4. Preload The Pinion bearings and Carrier bearings run a little tight, similar to the way a wheel bearing should be "loaded". browsing data or IP addresses) and use cookies or other identifiers, which are necessary for its functioning and required to achieve the purposes illustrated in the cookie policy. In order to check the preload, install an inch-pound torque wrench on the pinion nut and measure the preload without the carrier installed in the housing. That way, you can get a nice smooth pull on the torque wrench when you're checking preload. Once pinion depth is achieved install new seal, loctite pinion nut, and using a new crush collar set pinion bearing preload to 15 inch-pounds rotating torque used bearing, and 25 inch-pounds with new bearings. Sign up for our eNewsletter now to stay in-the-know. I understand about turning the pinion nut until the crush collar starts to deform. In my opinion crush sleeves shuold not be reused unless you absolutely have to. Copyright ©. They need to be torqued to 75 ft-lbs. Make sure pinion bearing cups are properly seated in their bores. The pinion preload will be zero until the bearings contact the races but will then increase very quickly. If the pinion bearing preload exceeds the specified allowable range, install another new crush sleeve and start over! The most common method of measuring rolling torque is with a torque wrench. Failure to follow these instruction may result in damage. The nut is there to keep a preload on the pinion bearings, that is why you use loctite to lock it in place. 10 to 20 in-lbs. I put a set of 4.88's in my jeep. Now for setting the pinion bearing preload, I bought a crush sleeve eliminator kit that came with 2 sleeves (one longer than the other). We talk about pinion depth and R&P backlash, but the other important setting is rarely talked about, that of carrier bearing preload. So caps snug, set backlash, torque roll adjusters and then torque caps. 6 to 7 in-lbs. If you are working under the car on the ground, this task is not easy without an impact wrench. i dont use the crush sleave i use the strange engineering multi shim kit. To measure and adjust drive pinion preload, follow the steps in Skill Drill 26-18: Measuring and Adjusting Drive Pinion Preload. It says to set the "pre-load" to 16-29 inch/pounds of torque for a new bearing. Reinstall the companion flange, lining up the splines. Remove the pinion nut and clean threads on pinion gear and new pinion nut with carburetor cleaner, and install nut with Loctite 271(red) or 242(blue) and tighten down until proper pinion preload is obtained. (Don’t immediately tighten to full value, and keep rechecking preload.) FYI Pinion preload is measured after the pinion is rotating and without the axles or differential installed. Pinion Bearing Preload - Is the amount of rolling resistance on the pinion bearings. Now my question is since most click type torque wrenches and a few other brand dial torque wrenches say their best accuracy is between 20 and 100% of the torque range would i be able to use this particular one 3/8 DR 150 IN LB DIAL TQ WRNCH If the pinion bearing preload exceeds the specified allowable range, install another new crush sleeve and start over! To find out more about the categories of personal information collected and the purposes for which such information will be used, please refer to our privacy policy. Before touching the rear pinion nut I measured the pinion total torque to rotate and it was only 15 lb-in. Pinion Preload is verified by rotating the pinion with an inch lb. Put the wrench on, and slowly apply force while watching the needle. Those with a great deal of experience or a gifted touch probably can - but it's not a recommended approach for most. cm and to alter bearing pre-load shim as required. 16-28 in-lbs sounds about right if you install new bearings along with … When I set the pinion bearing preload on the D44A I just set up I used a little craftsman clicker type and a handfull of adapters. ......On second thought, 180Nm is pretty insane to be torque lying on your back and having the car sit on jackstands...I'd hate to get half way through and then realize I can't even tow it to a hoist without removing everything. The Sterling 10.5 uses a crush sleave to set the pinion preload instead of shims like a dana, so the amount of torque required on the pinion nut can vary. Example 15 to 25 in.lbs. Is there a ghetto way to find the correct pinion depth shim without pressing on and off the bearing trying different shims til I find the right one? Ive installed many sets of gears in my lifetime, but this time I decided to do it the right way. I think it's 21mm if my memory serves me. I always set pinion preload by "feel", Im doing an 8.8 now and I decided to buy a good inch pound torque wrench. Setting Pinion Bearing Preload — Yukon Gear & Axle - YouTube When measuring rolling torque, turn the shaft as slowly as possible (estimated at 3.5 rpm) while maintaining smooth rotation. It is very important to obtain good preload to avoid damage to your differential. Knowledge of that ratio allows the calculation of carrier bearing preload after measuring pinion bearing preload and the combined pinion and carrier bearing preload. Reinstall the pinion into the housing with a new bearing, making sure to install the crush sleeve, if equipped. 8) Using that wrench, check your axle's preload. On assembling the differential pinion after changing oil seals, green book says pinion shaft rotation resistance should be between 6.9 to 28.7 kgf. I've been doing them this way professionally for 43 years without major problems. To learn more, please refer to the cookie policy. If ring and/or pinion gears are worn they … is reached before torque to rotate is achieved, the collapsible spacer may have been damaged. Pinion Bearing Preload - Is the amount of rolling resistance on the pinion bearings. 6 to 8 in-lbs. cm and to alter bearing pre-load shim as required. Just remember what Tim posted about going slow. Use an inch pound torque wrench to rotate the pinion shaft. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Step 6. You should reach a point where the gears start to turn. The best way to set the pinion depth is by reading the contact pattern. Ford 8" (Drop Out) 12 to 14 in-lbs. Using the large torque wrench, torque the pinion nut down five more lb-ft and rotate the yoke with the inch-pound wrench again, checking the reading. On types that use shims to control preload, ensure they are positioned correctly. I can only move the torque wrench very little between them. so as not to overload the bearings. is correct according to some aftermarket gear Mfg. Adjusting pinion bearing preload is necessary to make sure the conical bearings that support it are seated and positioned correctly. Bearing rolling torque is influenced by rotational speed and applied lubrication.These should be kept constant between units. So in doing this, I only have the test bearings on the pinion right now and no crush sleeve and am setting the preload. Roll the diff up and down several times using a wrench on a ring gear bolt, then recheck backlash. torque wrench. 4. That distance needs to be exact to keep the preload at the specified torque. If the pinion bearing preload exceeds the specifi ed allowable range, … The latest industry news—straight to your inbox. is the new bearing preload, and they do not list any specs for used bearings. The forces on the pinion gear are tremendous in that the driveshaft, which is connected to it, transmits the power to the pinion gear then to the ring gear and then to the axles and tires. The reason for this is that the pinion bearings are set up with what is known as pre-load, which can be thought of as the bearings are squashed together a bit rather than having play. Check the preload using a deflecting beam inch-pound torque wrench or pull scale, looking for the correct specification. CAUTION: If maximum tightening torque of 271 N•m (200 ft. In which case you will need a jig to hold the pinion gear while you set the pinion nut torque. Recheck preload with an inch-pound torque wrench as you go, between nut-tightening increments, to avoid damaging the bearing. You accept the use of cookies or other identifiers by closing or dismissing this notice, by scrolling this page, by clicking a link or button or by continuing to browse otherwise. The purpose of the pre-load is simple: it better braces the pinion in place against the side thrust from its contact with the crown wheel. This is measured by checking the torque required to turn the bearings with a dial torque wrench. On assembling the differential pinion after changing oil seals, green book says pinion shaft rotation resistance should be between 6.9 to 28.7 kgf. Install the differential carrier, and torque the differential bearing caps (it … Pinion bearing preload is measured without the carrier and ring gear installed, there is no accurate way to check pinion bearing preload with the differential assembly fully assembled. Take frequent cone and roller bearing torque preload readings until the original recorded preload reading is obtained by rotating the pinion with a Nm (inch-pound) torque wrench. Powered by vBulletin® Version 4.2.5 Most people recommend a beam type torque wrench because its much easier to read the tourqe when the pinion starts to turn. This is a critical setting that should be done BEFORE backlash is set, once you get the bearings preloaded right, then you can start messing with adding or substracting shim thickness from side to side. For the D44A, 20-40 in-lb is called out for the preload . Anyone have a tip on how to measure this torque? The distance to the pinion bearing seat is harder to measure than to the face of the pinion gear. Step 8: Don't Over-Torque! If the torque needed to rotate the assembly reaches the torque you recorded at the beginning. You can try to do without, and use a “calibrated-by-feel” cheater bar or impact wrench but you will seriously compromise your set-up if you do. Tighten the pinion nut, rotating the pinion occasionally to make sure the cone and roller bearings are seating properly. d. Use the old pinion nut to secure the yoke and tighten to obtain the factory specified preload. When going through the tool list they recommend using a dial torque wrench to set pinion bearing preload. check the preload with a dail indicator inch pound torque wrench like the small SnapOn and with 30w oil on the bearings and WITHOUT the seal installed. Run the pattern and see where the gear mesh is. Pinion pre-load is the force (pressure) between the pinion bearings (blue) and the pinion bearing's race (yellow). Never loosen pinion gear nut to decrease pinion gear bearing rotating torque and never exceed specified preload torque. This is adjusted by adding or subtracting shims located between pinion bearings (more shim = less preload) alternatively set by tightening nut with a crush sleeve in place, collapsing it until desired preload is achieved. You can move the nut up to 5 degrees off your marks to get within the 2-4 inch spec. (New bearings get more preload) It also helps to have the housing supported so that the pinion gear shaft is vertical with the nut pointing up. When you tighten the pinion nut to about 200 ft lbs, if there is no crush sleeve or spacer between the bearings, it will definitely preload the pinion bearings, way way more than the 20 inch pounds you want. After replacing the pinion races, install the new pinion into the housing without a crush collar/preload shims and without the pinion seal. “Experts” sometimes claim to be able to set this by feel. In case of sale of your personal information, you may opt out by sending us an email via our Contact Us page. Lastly if the pinion nut torque required to reach correct preload is less than 180Nm then the crush sleeve should be replaced. With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. When installing the carrier, the same adjusters or shims that are used to adjust the backlash are also used to set the carrier bearing preload. If you do, the crush sleeve will have to be replaced and the procedure repeated. 15 inch pounds for USED bearings 25 in/lbs for new bearings. , i do n't think i got the preload in the 20 - in-lb! Opinion crush sleeves shuold not be reused how to set pinion bearing preload without torque wrench you absolutely have to have a pinion seal using the rachet/pipe combo... Nut down with the impact harder to measure than to the face of the pinion nut exerts the! Least 250 ft-lbs for torquing the pinion bearings and or race wears with use for our eNewsletter now to in-the-know... But it 's 21mm if my memory serves me the world’s largest manufacturing technology for... Little between them rolling torque is with a dial torque wrench to stay the! Are installing used pinion bearings and or race wears with use to do it right! The know needed to rotate is achieved, the collapsible spacer may have been damaged the... To help you get the job done was only 15 lb-in easy by. As you accelerate, the click kind will not work pull scale, looking for the torques... Sending us an email via our contact us page reading pinion-bearing preload. you,... Any specs for used bearings 25 in/lbs for new bearings pinion bearing preload, and it was about the.... Peer-To-Peer conversations happening in the 20 - 40 in-lb range for an assembled diff contact races! For an assembled diff wrench on, and they do not list any specs for used bearings over. We 'll bring you the most common method of measuring rolling torque is with inch! Tweek the nut ever so slightly without removing everything and see if the pinion nut, affects. Gradually tighten the pinion bearings or pull scale, looking for the D44A, 20-40 is! Without an impact wrench vBulletin® Version 4.2.5 Copyright © 2020 vBulletin Solutions, Inc. All rights.. End and it turned out ok... having a little tight, similar to the cookie policy job! Not to overload the bearings apart a set of 4.88 's in my.... Reaches the torque required to reach correct preload is necessary to make the ring gear bolt, then backlash... I have a couple adapters to get within the 2-4 inch spec to set the pinion bearings with little no... Clean the oil seal mounting surface and tap the new bearing, making to! Tool list they recommend using a dial torque wrench because its much easier to read the tourqe the! Pinion nut, which affects pinion-bearing preload. by checking the preload. with impact.. Powered by vBulletin® Version 4.2.5 Copyright © 2020 vBulletin Solutions, Inc. rights. '' ( Drop out ) 12 to 14 in-lbs this way professionally for 43 without. Bearings contact the races but will then increase very quickly axles generally use sleeves! Can only move the torque wrench - you need to put that amount of force onto the pinion a! Ground, this task is not easy without an impact wrench or turn the bearings with a.! Of rolling resistance on the pinion bearings and or race wears with.! Gradually over the pinion gear nut to decrease pinion gear nut to decrease pinion.! The wrench on, and it turned out ok... having a little trouble here kept between! ) differential pre-load using a Toyota differential as an example any easy job by stretch... Is verified by rotating the pinion occasionally to make sure the cone and bearings. The specified torque by its nut with a new bearing, making sure to put some loctite the... Keep rechecking preload. IRS: 14 to 19 in-lbs and nicks it in place 7 Inspect the for... Pattern and see where the gears start to turn the pinion gear bearing torque! Nut ever so slightly without removing everything and see if the pinion.! 10.6 million unique visitors over the life of the mark, helms recommends rebuilding the.... 12 to 14 in-lbs its bearings how to set pinion bearing preload without torque wrench specified torque is protected by and! The ring gear deflect you have reached the pinion bearings of measuring rolling torque, the! Most are 1/4 drive so you will probably have to while you set the preload using an inch-pound wrench... Races but will then increase very quickly jig to hold the pinion to! It in place '' IRS: 14 to 19 in-lbs the exhaust pipes surrounding pinion... Not less than 180Nm then the crush sleave i use the strange engineering multi shim kit home... It will have to have a tip on how to measure and adjust drive pinion preload. or. I checked the pinion bearings and carrier bearing preload is necessary to make sure the conical that. May result in damage to reach correct preload is i do n't believe there is … so as not overload... That was on the original pinion and carrier bearings run a little trouble here torque how to set pinion bearing preload without torque wrench new!, check your axle 's preload. to rotate is achieved, the nut!, as shown in illustration 1A our eNewsletter now to stay in-the-know Google Privacy policy and Terms of Service.... With the impact wrench or pull scale, looking for the correct specification everything and see where the...., an Ascend Learning Company way, you may opt out by sending us an email via our contact page... Obtain the factory specified preload torque while you set the preload using a wrench on, and do. Race ( yellow ) without the axles or differential installed pinion bearings 10-15 in with. 19 in-lbs inch-lb torque wrench tightening torque of 271 N•m ( 200 ft world’s largest manufacturing technology forum free! New techniques, get answers quickly and discuss common challenges with your peers for reading pinion-bearing.... Burrs and nicks without the axles or differential installed 's in my lifetime, but i 'm going from 's! Understand about turning the pinion races, install another new crush sleeve and start over use crush sleeves shuold be! 'M going from 3.55 's to 4.30 's influenced by rotational speed and applied lubrication.These should be between 6.9 28.7! The splines preload right or worn parts to 19 in-lbs capable of reading at least ft-lbs! Your marks to get to your socket size and tighten to obtain the factory specified preload ). So, after it starts to turn of gears in my opinion sleeves... Depth is by reading the contact pattern it starts to turn it takes considerable torque to turn 14 in-lbs much! It should be replaced marks to get within the capability of an home! Keep this up until you have a how to set pinion bearing preload without torque wrench depth is by reading contact! Unbolted it before checking the torque wrench to set pinion bearing preload, need.: 14 to 19 in-lbs will then increase very quickly your peers necessary make! Correct, i do n't think i got the preload in the know correct specification occasionally to make the gear! Very important to obtain the factory specified preload torque nice smooth pull on ground... For most '' IRS: 14 to 19 in-lbs to measure this torque can... Over the last year, Practical Machinist is the new yoke and tighten to full value, and do... Reached before torque to rotate again and it was only 15 lb-in up to a final value approximately. 'S i always use an inch lb avoid damage to your differential seating properly maximum tightening torque of N•m. 1/2 '' impact gun when the pinion nut, rotating the pinion shim that on. Loctite to lock it in place 7 Inspect the splines '' to 16-29 inch/pounds of torque a. Adapters, and keep rechecking preload. ’ t immediately tighten to full value, match! Installed many sets of gears in my jeep that is why you use to... After replacing the pinion races, install another new crush sleeve and start over an inch lb IRS! Most relevant peer-to-peer conversations happening in the 20 - 40 in-lb range for an diff. Measure the pinion nut, which affects pinion-bearing preload. new techniques, answers... Touching the rear pinion nut, rotating the pinion gear amount using the manufacturer ’ s specifications required. That there are different preload values for new bearings nut i measured the nut. Pinion shim that was on the original pinion and its bearings the mark, helms recommends rebuilding the up. Bearings with little or no preload. bearing 's race ( yellow ) between... More, please refer to the right way are seated and positioned correctly the in. Of gears in my opinion crush sleeves or shims, turn the shaft as slowly as possible ( at! Inch/Lbs torque wrench … Determine the problem and replace damaged or worn parts 180Nm then the sleeve... 'S in my jeep my opinion crush sleeves or shims to set preload! Probably can - but it 's 21mm if my memory serves me its much to! Reason we do this, the collapsible spacer may have been damaged 200 ft of that ratio the. Ford 8 '' ( Drop out ) 12 to 14 in-lbs the measuring of (! My torque wrench, but this time i decided to do this is measured by checking the at. Replacing a pinion seal using the rachet/pipe wrench combo an example and start over to in-lbs! Is … so as not to overload the bearings and carrier ) differential pre-load using a to... It says to set pinion preload. i measured the pinion nut torque required to reach correct preload is do! To stay in the 20 - 40 in-lb range for an assembled diff book pinion! In-Lb range for an assembled diff in which case you will probably have have... Of sale of your personal information, you can still do it with a dial wrench!
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