If you are installing an axle and need to know the torque specs, it is important to first understand what torque is. Furthermore, this action reflects positively on the company's overall commitment to providing reliable transportation services while ensuring its customers' safety remains paramount at all times. Nov 18, 2016. If you're just starting out your adventure with single speed or fixed gear bikes then it's best to opt for ratios around 2.7-2.8 as they are easier on your legs and can help build up strength gradually as you continue cycling further and faster each time. These are two pinion gears for the 8.5-inch 10-bolt. Preload plays an important role in many machine designs for its ability to reduce wear and tear on critical components while improving efficiency and accuracy. Would this be the same How to write up for my truck? With the exception of truck differentials with 30-spline axles, andthosecarrying 2.41 and 2.73 gears (series two), the differentials will support all gear ratios without having to change carriers. .006" to .010" 120 ft-lbs. . Backlash arises when two gear teeth mesh together in order to transmit power from one shaft to another; the teeth need some play to avoid jamming and ensure smooth operation. In either case, it is important that this critical adjustment be performed correctly in order to avoid costly repairs or replacements down the line. The "feel" people are way more experienced that you or I so the top one is re-commended. It said you want this to be from 5-35. I like to slowly tighten the new pinion nut until I take up all of the front to back free play. #5. A Series 2 carrierwill work with 2.56 and higher gears (numerically lower) such as 2.41. Assemblers must decide for themselves how much leeway they are willing to allow in this area and assess whether the potential results would warrant such leniency. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. Now that the hard part is done you can re install the carrier with the shims in place, torque the bearing caps and run one more contact pattern to make sure everything is good to go. This is all with the old crush sleeve. and 12 bolt #s. found these #s at Richmond Gear: Torque specifications. 1/2" x all lengths 100-110 ft lb. We look forward to serving you! It is important to keep in mind that this can change dramatically based on specific materials used or other variables so it is critical to be sure to consult any instruction manual included with your differential cover before attempting any installation. Axle Order Form; Floater Axle Order Form; Custom Driveshaft Order Form; . Pin. 2429 Mercantile Drive Suite A GM 8.5" 10 Bolt / Ring & Pinion Gear Set w/ Master Bearing . These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. If you're looking to get the most out of your pickup truck, you may want to consider changing the gear ratios. The rotational torque spec is between 15-19. By Albert. If it takes a 5/16-inch wrench to remove it, its an 8.5. When changing a ring & pinion and doing final install of pinion there is no torque spec on the pinion nut itself. 1. The pinion on the left is part of a 4.11:1 gear set; the one on the right is a 3.08:1 pinion. Not only is it important to keep the backlash variation under 0.005?, but in an ideal world, no variation should be present at all. DIFF MODEL. The PYN10 - 10-Bolt 8.5" Pinion Nut is perfect for 30 spline pinions, providing a dependable and secure connection between the driveshaft and differential ring gear. What is the gear ratio on a 10 bolt rear end? How do you fix a loose pinion bearing preload? With careful consideration, selecting an appropriate option for your driving style can make a world of difference when it comes to performance and efficiency behind the wheel. With proper maintenance, this rearend will hold up over time and ensure that your vehicle runs smoothly no matter what sort of conditions you put it in. Shop Differential Pinion Bearing Spacers and Sleeves at Summit Racing. Additionally, its unique thread pattern provides torque retention while eliminating any possibility of loosening or vibrating off over time due to vibration or shock loads. Some pinion nuts require a special procedure to be properly installed. for new bearings. Here are the thin shims from the Summit crush sleeve eliminator. It is estimated that this specific axle saw use on over 11 million vehicles during its reign of production making it one of the most popular axles ever created by GM for their consumer market line up. The ideal amount of torque required on a pinion nut when installing an axle depends on many factors, but typically you should aim for 110-125 ft/lbs of torque unless otherwise specified by step #6 during the installation process. Replace original worn or damaged nuts each time a gear set is changed. Once you give everything a thorough inspection you can begin the re-assembly process. Known alternatively as the GM 8.875-inch (referring to its ring gear diameter), Chevrolet's 12-bolt rear end is one of the most celebrated in the American hot-rodding scene. Ford 9 inch Torque Specs for Ford 9 inch center Section torque specs. Many times, if you locate a 10-bolt rearend, its usually a 7.5-inch unit. These have been around since 1975, and were installedunder cars, small trucks, and vans up to the 2005 model year. On the other hand, if the preload is set too loose it can cause a whining noise to originate from within the rear end as well as abnormal gear wear due to excessive movement between the two components - eventually leading to failure. I have a leaky pinion seal and housing seal so I am planning on replacing the seals in the very near future. Cover Bolts: 25 ft lbs. Uses 28 or 30 spline c-clip axles. Dana 60. While this article focuses specifically on the GM 8.5 10-bolt rear differential, the parts and processes described herein cover most differential housings.Built from the 1970s through today (the 8.6" 10-bolt is still used in most GM . Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. Sometimes, you need to push yourself. For inquiries about our products and services, please fill out the form below. The 8.5-inch 10-bolt rearend is hugely popular because aftermarket carriers and gears are easily interchangeable. Whats The Reason Enthusiasts Cant Get, Yes I Am A Dinosaur, And Why I Feel Electric Cars, Rare Rides: The 1969 Chevrolet Camaro COPO, SPEC Clutches: For That Next Engine Swap Or OEM Upgrade, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop Shop, Moroso Anti-Roll Kit Is The Right Tool For The Dragstrip, Why You Need A Proper Fuel Tank Vent In Your Ride, Fenix Is A Next-Gen 69 Camaro With 1,180 Horsepower. The easiest way to identify the 8.2-inch rearend at a glance is by the shape of the housing and the spacing between the lower bolts on the cover. You can replace the pinion seal without changing the crush sleeve. Tighten bolt to 20 ft/lbs. By following these steps carefully and precisely, you can ensure that your gear and carrier are set up correctly for optimal performance. GM 8.875" 12 Bolt Differential Ring Gear and Pinion Set. FSM says 181-325 ft-lbs. After it has been properly crushed (by checking the rotating resistance of 19-22 inch pounds on the pinion) there should be at least 150 pounds torque on the pinion nut (or else you pull it apart get another crush sleeve and start over). That's all fine and dandy but my pinnion was chewing it's way through the carrier and now I can't get the passenger side c clip to drop out. GM 10 Bolt 8.2; GM 10 Bolt 8.5; GM 12 Bolt 8.875; GM 8.6 IRS; GM Install Kits; MOPAR. I will attempt to cover the necessary steps in building a differential for a GM 10 bolt rear end with an 8.5/8.6 ring gear. Install left-side adjusting nut lock, washer, and bolt. When I changed all the bearings in my suburban rear end, I bought the crush sleeve eliminator shims from Summit. One intimidating part for a lot of guys is the rear end. The most current parts and application information can always be found here on our website or by calling one of our differential parts experts. For over a decade, the 8.5-inch 10-bolt was widely used as an axle in many cars and trucks produced by General Motors. Connecting Rod Cap Nuts 38. You will need a torque meter in inch-lb. This process helps increase longevity of both the pinion gear and its tapered bearings while also providing optimal performance from both components at all times. For that reason,many enthusiasts are considering the 10-bolt. For the fastest service, call our Differential Parts Experts at (800) 510-0950 for immediate assistance. The pinion nut should then be secured and tightened until there is no bearing play at all. 5. put back together and tight pinion nut to specified torque. This is especially true when it comes to cycling. GM 8.6" gears will fit GM 8.5" axles and as such have become the universal aftermarket size for both. May 22, 2021 / Lifted78Chevy. This procedure is necessary in order to ensure that everything within the drivetrain is working correctly and efficiently. The correct way to do this is to use the yoke lock (part of the setup tool kit we bought) and use a breaker bar with a cheater pipe. For a better experience, please enable JavaScript in your browser before proceeding. 5 - 8 : Ring Gear Bolt Torque (Foot lbs) 120 : Bearing Cap Torque (Foot lbs) 135 : Pinion Nut Torque: Tighten as necessary to obtain correct preload: Pinion Bearing Retainer Torque (Foot lbs) :65 : . With its strong construction and durable material, the PYN10 10-bolt 8.5" pinion nut makes for an excellent choice for those looking for reliable performance in even the most extreme environments. (Note: The 7.5 GM rear used different pinion bearings in 1979-80 vs. the 81-up axles, so you want to make sure that the old bearings match up to your new pinion bearings). However, when you have new gears, a new posi unit, and other variables like mixing housings with differentials you might have to try multiple shims to get a good pattern. The 8.5-inch is often referred to as the "GM corporate 10-bolt" because of its multiple uses, and the 8.5-inch is a semi-float axle, meaning it has only one axle bearing per side, mounted inside the axle tube. Upon initial . You keep on tightening the pinion nut until you are within the in-lb. It's not easy, but pushing yourself can be rewarding; after all, with hard work come great rewards! Used bearings 10 to 14 inch pounds. Since listing them all within this article is impossible, well be focusing only on visual identification. Quaility Gears provide guaranteed performance. These protrusions are larger than those on the 7.5 rearend. If it takes more than 25 in lbs to turn the pinion, then you have tightened it too much and you need to back the nut off. Furthermore, its thread size of 1 7/16"-20 makes it compatible with nearly all GM style rear ends from 1955 to present day models. When it comes to adjusting the backlash of your vehicle's pinion gear and carrier, there are a few rules of thumb to keep in mind. The number of teeth on each of these gears determines how much rotational force is converted into torque or speed. This tension is achieved through a collapsible spacer which is placed between the bearings and then compressed by turning the pinion gear nut. Bearing Cap Torque (Foot Lbs.) Record pinion flange rotating torque, with a torque wrench. I thought the pinion nut would be more like 50-75 FOOT pounds? Jul 2, 2020 / 1989 Toyota Pickup/3vze/R150F/Dual RF1A's/8.0 Detroit/8.0 Detroit/5" SAS/38 TSL'S. Pinion Nut (Solid Spacer) 28-Spline Pinion - 200 ft lbs. Like all Chevy 10-bolts, the axles are retained by C-clips on the inner end of the axle shaft inside the carrier. Zach got enlisted by a friend to help rebuild the 7.5" factory 10 Bolt rear in the G-Body Monte that he is working on, so naturally it became a teaching moment. The oval-shaped cover measures 8 5/16 inches by 10 9/16 inches. OEM bolts have thread locker on the threads. If youre looking for a good.economical 10-bolt rearend to rebuild or install into your hot rod, you will need to be able to accurately identify thedifferent units so you dont accidentally come home with a 7.5 or 8.2-inch differential. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? It involves placing a collapsible spacer between the bearings of the pinion gear, then using a torque wrench to tighten the pinion nut until it reaches the correct amount of pressure or preload on the bearings. The inch pound rating is the force required to turn the pinion after the crush sleeve has been crushed. While backlash is a necessary component of manufacturing tolerances, it can be a significant source of problems for certain applications. . This is very important, because if you go too far the crush sleeve will be ruined. Nut secures driveshaft yoke to pinion gear. I am also replacing all the bearings on my son's 97 Chevy rear end. From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. We started by getting a rebuilt kit from Motive Gear . Low-end torque refers to the amount of power and force generated by an engine at low revolutions per minute (RPMs), usually between 2000 and 3000. grade 8. I was able to pull the old crush sleeve from the pinion gear shaft without damaging it, so I just reused it and added a 0.51mm shim to it. 14 TO 19. If you installed a new seal, add 1 or 2 in-oz. The following are recommended Differential Set-Up Specifications for various differentials. Talk to the experts. Additionally, this nut features a thread pitch of 11/16 x 20 which allows for easy removal during maintenance periods or when replacing bearings or other components within your axle assembly. Are all GM 10 bolts the same? With this pinion nut, you can rest assured that your vehicle will be ready for whatever terrain comes its way! So, in order to adjust the pinion bearing pre-load, shims of varying thicknesses are inserted into pre-load retainers. Rotate the pinion when tightening the nut to seat the bearings evenly. The distance between thebottom center bolt in the cover and its adjacent bolts is 3 1/4 inches. We believe that our exceptional customer service and product knowledge is what sets us apart from the competition. The purpose of preloading a bearing is to eliminate any existing clearance that has been designed into standard ball bearings by utilizing tension or compression loads applied directly onto each component within the assembly. ring gear bolts torque at 175lb/ft, bearing cap bolts torque at 200lb/ft, and the ring gear backlash should be between .006-.010 for aftermarket gears, .005-.007 for OEM gears. Call 800.979.0122, 7am-10pm, everyday. PINION PRELOAD NEW INCH LBS. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. All rights reserved. for a ten bolt rear it should be about 20 inch pounds while you are turning the torque wrench. The torque required to seat the nut is very large, possible 200 ft-lbs or more. We talked to a few of our in-house race experts about ways to make this racing season your best one yet! I reused the old crush sleeve and just added a thin shim out of the set to be able to get the pinion preload using the old crush sleeve. Try our Differential Gear Calculator. For bearings that are already in use, set preload at 15 inch-pounds; if they are new bearings then you should aim for 25 inch-pounds when setting preload. Not only does a torque vectoring differential perform the same basic tasks as a regular differential, but it also has an extra element that sets it apart: its ability to transfer torque between the left and right wheels independently. By doing this, it allows for the desired amount of pressure or preload to be applied on these bearings so they are able to work in harmony with each other within their particular drivetrain system. The distance between the lower center bolt on the cover and either adjacent bolt is 3 3/4 inches. This allows you to put the pinion gear in, set the pinion bearing pre-load, set the backlash and then run a contact pattern without the chance of compressing the crush sleeve too much. Now that we know our pinion depth shim is correct we can do the final assembly. Additionally, it increases load capacity because it prevents misalignment due to vibration or thermal expansion of components. Thats usually proven when used in high-performance, high-horsepower applications. Set the preload carefully (see "Set Up Specifications") so that the bearings will have a long life. We have your differential parts in stock ready to ship today. Is a GM 10 bolt rear end good? This strength comes from its larger pinion shaft diameter which measures 1.625 inches with 30 splines, 13 percent larger than the 1.438 inch diameter and 25 spline pinion shaft found on a 10-bolt axle. We are available to help Monday thru Friday from 8 AM to 5 PM Pacific Standard Time, and most orders placed by 4 PM ship out the SAME DAY! With the carrier removed w/ new bearings pinion bearing preload should measure a rolling torque of 20-30 in/lbs. Pinion Nut Torque Spec. This ring and pinion setup guide is Copyright Crawlpedia.com - Please provide a link back to this page when copying. This gives us confidence in the quality of the parts we sell. Backlash = 6-10 (.001 inch) 2003 S-10 ZQ8 - 262/M5:bowtie: 1986 Pontiac Trans Am - 355/A4 The 8.5-inch and 8.6-inch 10-bolt rears are stout and effective differentials that can handle more power than either the 7.5 or 8.2-inch rears. This means that extra care and attention needs to be taken when installing these components so that they do not become damaged or rendered unusable. If the backlash is too tight, you'll need adjust the carrier shim by moving it away from the pinion. Oct 29, 2001. The pinion diameter is 1.438 inches, and has 25 splines. First I measured the old crush sleeve as a starting point. Its strength and reliability have been proven time again, making it an excellent option for drivers looking for reliable performance from their vehicle. It is well known that altering the gear ratio of a vehicle, whether it be through changing the pinion or spur gear, can have a significant effect on performance. Just out of curiosity,what are the 8.5 (r 65lbft & c 60lbft ?) 2023 Power Automedia. Upgrade your cam, intake, headers, stall converter, and the list goes on from there. Recheck the torque to turn the pinion until it gets to the point where the amount of torque it takes to turn the pinion is between 15-25 in. Although the 7.5-inch 10-bolt closely resembles the 8.5-inch housing, you can positively identify the Chevy7.5-inchrearend by measuring it. Pinion preload (new bearings): 17 - 30 in*lb. If your mom is lunch, then yes, I've eaten lunch twice today. It should be noted that while this axle is suitable for everyday driving and light duty applications, it must be upgraded if you plan on doing any serious racing or off-road activities with your vehicle. Find the application and ratio you need? minimum is 181 ft-lbs., maximum 325 ft-lbs., keep cranking till you get within the range of 7.8-11.3 in-lbs of preload torque on the pinion. Additionally, vehicles with higher torque have better control over their handling due to stronger low-end acceleration which makes them safer on roads and highways.