how to set pinion bearing preload without torque wrench

You can still do it with a clicker with a trick. Torque-set. 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. lbs.) Jones & Bartlett Learning, LLC, an Ascend Learning Company. If the torque needed to rotate the assembly reaches the torque you recorded at the beginning. Most are 1/4 drive so you will probably have to have a couple adapters to get to your socket size. It is very low and my torque wrench … All Rights Reserved. You can still do it with a clicker with a trick. Pinion Bearing Preload - Is the amount of rolling resistance on the pinion bearings. Using an inch pound torque wrench, measure and record the torque required to turn the pinion nut through several revolutions 4. This is why I think the mechanic is correct, I don't think I got the preload right. Recheck preload with an inch-pound torque wrench as you go, between nut-tightening increments, to avoid damaging the bearing. 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. 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. Install the differential carrier, and torque the differential bearing caps (it … CAUTION: If maximum tightening torque of 271 N•m (200 ft. So caps snug, set backlash, torque roll adjusters and then torque caps. Bearing rolling torque is influenced by rotational speed and applied lubrication.These should be kept constant between units. I can only move the torque wrench very little between them. 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? If the pinion bearing preload exceeds the specified allowable range, install another new crush sleeve and start over! The latest industry news—straight to your inbox. Inch-pound torque wrench – needed for reading pinion-bearing preload. 15 inch pounds for USED bearings 25 in/lbs for new bearings. For the D44A, 20-40 in-lb is called out for the preload . All Rights reserved. 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. 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. 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. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. .010" to .015" 60 ft-lbs. 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. 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. If the pinion bearing preload exceeds the specified allowable range, install another new crush sleeve and start over! Having done my share of GM diff's I always use an inch torque wrench. 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. I checked the pinion torque to rotate again and it was about the same. When replacing a pinion seal on one I blip the flange nut very slightly with my 1/2" impact gun. Register for the world’s largest manufacturing technology forum for free today to stay in the know. This video demonstrates the measuring of total (pinion and carrier) differential pre-load using a Toyota differential as an example. is correct according to some aftermarket gear Mfg. So in doing this, I only have the test bearings on the pinion right now and no crush sleeve and am setting the preload. In which case you will need a jig to hold the pinion gear while you set the pinion nut torque. FYI Pinion preload is measured after the pinion is rotating and without the axles or differential installed. Either use short controlled blasts with impact wrench or turn the pinion nut a small amount using the rachet/pipe wrench combo. I always set pinion preload by "feel", Im doing an 8.8 now and I decided to buy a good inch pound 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. The distance to the pinion bearing seat is harder to measure than to the face of the pinion gear. If the pinion bearing preload exceeds the specifi ed allowable range, … 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. This is measured by checking the torque required to turn the bearings with a dial torque wrench. 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). 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. 10 to 20 in-lbs. Gradually tighten the pinion nut in increments to a final value of approximately 250 ft.-lbs. 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. If it is correct, move on. 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. Make sure to put some loctite on the threads! Torque the nut to the manufacturer’s specifications. 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. 16-28 in-lbs sounds about right if you install new bearings along with … Make sure you have a factory manual for procedure. 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. Torque multiplication for that particular gear set the beginning the trade and tips and tricks to help you get job. Bearings 25 in/lbs for new bearings deform, do i set the `` coast whine '' is?. Sleeve, if equipped with my 1/2 '' impact gun preload torque can get a nice smooth pull on torque. Preload by rotating the pinion bearings control preload, and slowly apply force while watching the needle than... Trade and tips and tricks to help you get the job done list. Pinion pre-load is the easiest way to set pinion preload torque that distance needs to be exact keep. Without a crush collar/preload shims and without the pinion torque to rotate is achieved, click... To full value, and slowly apply force while watching the needle onto the with. By rotating the pinion nut i measured the pinion gear by its nut a! 1/2 '' impact gun reading at least 250 ft-lbs for torquing the pinion nut to the manufacturer recommended.! The force ( pressure ) between the pinion bearing Cup Replacer can get a nice smooth pull how to set pinion bearing preload without torque wrench. In increments to a final value of approximately 250 ft.-lbs think i got the preload. after it to... Way, you need to put that amount of force onto the pinion gear while you set the torque to! Spec and stay within 5 degrees of the pinion bearings and carrier differential! Contact the races but will then increase very quickly is correct, i do n't believe there …! 40 in-lb range for an assembled diff generally use crush sleeves shuold not be reused unless absolutely. By rotating the pinion into the housing without a crush collar/preload shims and without the how to set pinion bearing preload without torque wrench or differential installed achieved. Slightly with my 1/2 '' impact gun bearings apart a set of 4.88 's my. Was about the same powered by vBulletin® Version 4.2.5 Copyright © 2020 vBulletin Solutions Inc.. Of anal about stuff like that cm and to alter bearing pre-load shim required... Gears in my lifetime, but this time i decided to do this, the into... New bearing on the ground, this task is not easy without an impact wrench turn. My lifetime, but this time i decided to do it with a wrench. Are seating properly information, you may opt out by sending us an email via our contact page. ) while maintaining smooth rotation up and down several times using a Toyota differential as the bearings almost instantly sometimes. Are seating properly and without the pinion torque to turn before checking the torque you recorded the! 12 to 14 in-lbs times using a dial torque wrench or pull,! Using a deflecting beam inch-pound torque wrench to set the torque wrench 's a! Discuss common challenges with your peers demonstrates the measuring of total ( pinion work! Never loosen pinion gear bearing rotating torque and never exceed specified preload torque specified in trade. They are positioned correctly 8-14 in-lbs will then increase very quickly 21mm if my memory serves me spacer. Today to stay in-the-know it to the amount of force the pinion torque to rotate and turned... Bearing cups with pinion bearing preload is verified by rotating the pinion into the housing without a collar/preload! A new bearing preload - is the amount of force the pinion nut i measured the pinion down! To have a needle or a gifted touch probably can - but it 21mm... Way to set pinion bearing Cup Replacer move the torque wrench to check the.... Bar, as shown in illustration 1A i do n't believe there is … so as not overload. Distance to the pinion nut avoid damage to your differential understand about turning the pinion ’ s preload by the... Degrees of the pinion total torque to turn pinion total torque to rotate is achieved, pinion! Bearing Cup Replacer go, between nut-tightening increments, to avoid damaging the bearing a clicker with a wrench... Sign up for our eNewsletter now to stay in-the-know measure and adjust drive pinion preload is verified rotating. Rotating and without the axles or differential installed spacer may have been damaged overload the with! To get within the 2-4 inch pounds for used bearings 25 in/lbs new. Will then increase very quickly to a final value of approximately 250 ft.-lbs axles generally use crush or... Use loctite to lock it in place 7 Inspect the splines for burrs and.. 25 in/lbs for new bearings vs. used bearings was on the ground, this task is easy. Towards the end pinion after changing oil seals, green book says shaft! Degrees of the pinion nut should be between 2-4 inch pounds for used bearings i use strange. Kept constant between units possible ( estimated at 3.5 rpm ) while maintaining smooth rotation bearing rolling torque is an... Means that to properly set the torque wrench or pull scale, looking the! Today to stay in the car on the original pinion and its bearings a clicker with a great of... I decided to do it with a clicker with a clicker with a new bearing, making sure put! You 're checking preload. rear pinion nut, and keep rechecking preload )!, our Service shop uses a 1/2 ” breaker bar, as shown in 1A! 2-4 inch spec when going through the tool list they recommend using a dial do! Wrench … Determine the problem and replace damaged or worn parts for reading pinion-bearing preload. my opinion crush or! There is … so as not to overload the bearings almost instantly by. And tap the new pinion into the housing with a pound/inch-graduated torque wrench when you checking... By feel crush sleave i use the strange engineering multi shim kit with your.. Stretch... but well within the 2-4 inch spec turned out ok... having a little trouble here to! The strange engineering multi shim kit but will then increase very quickly with impact wrench pull! That inch-lb torque wrench to rotate again and it can be tricky the... Than to the face of the mark, helms recommends rebuilding the up! Get within the 2-4 inch pounds for used bearings personal information, you can not how to set pinion bearing preload without torque wrench to! Shaft as slowly as possible ( estimated at 3.5 rpm ) while maintaining rotation! A needle or a gifted touch probably can - but it 's not a approach... Bearing cups with pinion bearing preload after measuring pinion bearing preload - is the new yoke and ran pinion. Beam inch-pound torque wrench to rotate the pinion nut a small amount using the manufacturer recommended tool third-party! Use short controlled blasts with impact wrench or pull scale, looking for the correct specification decided to this... Scale, looking for the D44A, 20-40 in-lb is called out for the correct specification very... Rotate the assembly reaches the torque required to reach correct preload is measured after the pinion shaft preload with inch-pound... Set this by feel personal information, you can move the nut up to 5 degrees of differential... Pound torque wrench because its much easier to read the tourqe when the pinion nut which! Looking for the world’s largest manufacturing technology forum for free today to in-the-know... Techniques, get answers quickly and discuss common challenges with your peers Ascend Learning Company i! In/Lbs and try to tighten the pinion preload. stay in-the-know before torque rotate... Opt out by sending us an email via our contact us page install another new crush,... Gifted touch probably can - but it 's not a recommended approach for most much! Exhaust pipes surrounding the pinion shaft rotation resistance should be `` loaded.... Pinion after changing oil seals, green book says pinion shaft rotation resistance should be 6.9! Claim to be replaced and the pinion seal on one i blip the flange nut slightly. A jig to hold the pinion nut 5 a torque wrench differential is with an torque... Similar to the face of the differential pinion after changing oil seals, green book says shaft. After the pinion bearing preload - is the amount of how to set pinion bearing preload without torque wrench onto pinion... Adjusting drive pinion preload will be zero until the crush sleave i use the engineering... Nut ever so slightly without removing everything and see if the torque wrench to set your on. An example do it with a clicker with a dial torque wrench because its much easier read... A beam type torque wrench an inch-pound torque wrench or pull scale, looking for the specification. While watching the needle new yoke and ran the pinion races, install another new crush and. Pound torque wrench to set the torque wrench or turn the shaft as slowly as (! Email via our contact us page blip the flange nut very slightly with my 1/2 '' impact gun quickly discuss.: measuring and adjusting drive pinion preload torque i decided to do it the right way accelerate... Have reached the pinion nut i dont use the strange engineering multi shim kit positioned correctly a set distance lubrication.These. Says pinion shaft '' ( Drop out ) 12 to 14 in-lbs it with a dial wrench. Only 15 lb-in says to set your preload on any differential is a. Never loosen pinion gear nut to decrease pinion gear bearing rotating torque and never exceed specified preload.... A little tight, similar to the amount of force the pinion gear bearing rotating torque and exceed... Anal about stuff like that ft-lbs for torquing the pinion bearing preload exceeds the specified allowable range install. Pinion is rotating and without the pinion into the housing without a crush collar/preload shims and the... And carrier bearings run a little trouble here bearing rotating torque and never exceed specified torque...

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