It is robust enough to withstand any punishment inflicted on it by racetrack use. 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. Pinion Nut (Solid Spacer) 28-Spline Pinion - 200 ft lbs. Lighter and more efficient than its Ford 9-inch and Dana 60 rivals, the 12-bolt enjoys as much use amongst brand-loyal off-roaders as it . 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 . . Reply Quote. PINION PRELOAD NEW INCH LBS. 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. When compressing the crush sleeve, many guys use an impact wrench and end up crushing it too far, ruining the sleeve. With this pinion nut, you can rest assured that your vehicle will be ready for whatever terrain comes its way! Preload doesn't have any effect on spring stiffness; rather, its used as a way of compensating for springs that are too soft or too stiff. We think top-notch customer service is the most important thing we do. The 8.2-inch 10-bolt has a smooth, round, lower-case area (no cast-in protrusions), with an 11-inch cover that has a diagonalprotrusion at the top. without any detrimental effects occurring. Thick Gears and Carrier Breaks - Thick ring and pinion gears and differential carrier breaks explained. 1. remove d shaft straps push shaft aside. IMPORTANT: The pinion preload should be at or below 4 Nm (35 inch lbs.) Alternate Description. . When I changed all the bearings in my suburban rear end, I bought the crush sleeve eliminator shims from Summit. If youre building a street car and want to improve performance, we all know the drill. This will ensure that your backlash is correct without having to swap the shims. MOPAR: 8.75" x 1.75" pinion: .090. . Tighten bolt to 20 ft/lbs. From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. This heavy-duty nut is made with high quality materials and manufactured to exacting standards, ensuring it stands up to whatever you throw at it. Not only is this a wise financial decision for both parties involved, but it also shows how much Chevrolet values customer satisfaction and safety. Increasing the size of the pinion or decreasing the size of spur gear will result in increased top speed for your vehicle; however this will come at cost to acceleration and increase temperatures from increased load. I like to measure the old crush sleeve and machine down a solid pinion spacer to that dimension and then . The tension between the bearings of a crush sleeve is a very important factor in its performance, as it helps to ensure that the bearing stays correctly set and does not move or become misaligned. What happens if you have too much backlash in differential. 1/2" T-bolts - 50 ft lbs. EDLANTA there is a "crush" spacer between the two pinion bearings that when tightened properly gives you the proper bearing preload. Some of the most popular GM vehicles have come with 10-bolt rear ends. Mikz86TA. 8-11 in/lbs for broken in bearings is acceptable. You will need to know that there are different series of differentials (seriestwo and three). 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. Next remove the nut and change the seal. But for all intents and purposes, the 10-bolt rearend is a great unit for a street/strip car, and can be stout enough to handle even the occasional abuse delivered by use at the racetrack. I have seen the ring gear bolts, pinion nut and retaining bolt come loose, but never a bearing cap bolt. Mine was a pita. For that reason,many enthusiasts are considering the 10-bolt. GM 8.6" differentials can be installed in a GM 8.5" axle with the proper conversion bearings. Some guys even go to the trouble of making a set-up bearing so you dont have to press on and remove the pinion bearing to try different shims. While adjusting preload can provide some relief from overly-stiff or soft springs, ultimately you should replace the springs themselves if they dont provide the desired level of performance. After that we removed the old bearings and cleaned all the parts up in the solvent tank. and 12 bolt #s. found these #s at Richmond Gear: Torque specifications. This is very important, because if you go too far the crush sleeve will be ruined. 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. I am also replacing all the bearings on my son's 97 Chevy rear end. Are all GM 10 bolts the same? By Albert. It was first developed for racing cars where superior control on fast corners is essential for success; however, today torque vectoring differentials can be found in many production vehicles as well due to their exceptional performance benefits. This heavy duty nut has been designed using high grade steel and features a zinc plated finish for maximum protection against rust and corrosion. The pinion nut needs to be torqued to 250 ft/lbs. For inquiries about our products and services, please fill out the form below. I have a 1993 Suburban K1500. But, did you know there is more than one style of 10-bolt rearend? (note make sure the pinion bearing is well oiled when doing this procedure.) Yukon Gear & Axle SK CSGM8.5 Yukon Gear & Axle Crush Sleeve Eliminator Kits | Summit Racing. We talked to a few of our in-house race experts about ways to make this racing season your best one yet! I have seen street 12 bolts that . 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). Good luck finding one of these, however, as they are very popular among performance enthusiasts. The rotational torque spec is between 15-19. 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. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. Set the preload carefully (see "Set Up Specifications") so that the bearings will have a long life. 7/16" x all lengths 60-65 ft lb. (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). How Much Hp Can Stock 5.3 Injectors Handle, What Kind Of Gas Does A Jeep Cherokee Take, Popping Noise When Accelerating And Braking. Sometimes it feels like youre in a race car when you accelerate hard with a high-torque vehicle. Jul 2, 2020 / Inch pound torque wrench that will read that low of a number which will be "VERY" costly. To do this, measure 10 thousandths of an inch on the shim and shift it accordingly. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. 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. For the street/strip car, the 10-bolt rearend is a great choice. It also uses a 10 5/8-inch irregular-shaped cover. Locate a Sierra Gear & Axle Distributor near you. There are a few that have geared axles on here so they should chime in and help out with Real TECH :rocking: Ring gear bolts 65 foot pounds, bearing cap bolts 60 foot pounds. First introduced in 1970 as a corporate replacement for the older 8.2-inch 10-bolt or 12-bolt 8.875-inch axles, its popularity quickly spread to nearly every GM division aside from Cadillac throughout the 70s. This should result in approximately 7 thousandths of an inch adjustment in terms of backlash. 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 : . One will want to torque the pinion nut to 190- 240 ft lbs (Small Diff's) D60 and larger 225 -350 Ft lbs with the proper preload achieved. To ensure optimal performance in any application, it is essential to pay close attention to the amount of backlash between gears on all differentials. sny 00235 converted It refers to how much tension is applied to the spring before it's installed in the vehicle and can be adjusted accordingly. Order before 4PM and most parts ship out the SAME DAY. It first appeared in 1970 production cars as a corporate replacement for the 8.2-inch 10-bolt rearend. Therefore when dealing with these types of sleeves it's important to make sure they are installed correctly so as not to compromise its integrity or longevity. With the pinion bearing properly lubricated, increase or decrease . Either way, the nut should be tightened to produce 24-32-in-lb of torque to turn the pinion . Read More. Most 8.5-inch 10-bolt rearends have two extruded, cast-in lugs on the bottom of the differential housing at the 5:00 and 7:00 positions. As an added reference, Speedway Motors also offers a great book from CarTech, titled "High-Performance Differentials, Axles & Drivelines" that helps with step by step breakdowns of the process. Originally, gear ratios ranged from 2.41 through 4.10. Instead of using a C-clip to hold the axle in the housing, these axle assemblies use bolt-in axles, much like an 8.2 BOP rearend. Some vehicles require an 8.5" 10-bolt pinion nut to secure the rear axle assembly of their vehicle. If it takes a 1/2-inch wrench to remove it, its an 8.2. 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. 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. Not sure the torque specs on the carrier bearing caps, we red lock-tight them and hit them with the impact pretty hard at work. 2429 Mercantile Drive Suite A, Rancho Cordova, CA 95742, Copyright 2023 West Coast Differentials | Website Design by. Bearing Cap Torque (Foot Lbs.) This ring and pinion setup guide is Copyright Crawlpedia.com - Please provide a link back to this page when copying. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. It is essential to ensure that the pinion flange is firmly held in place with a fixture or tool. Well show you what to look for in this buyers guide. These are incredibly robust pieces of machinery that can handle a surprising amount of power, as long as you use the right axle for your application. I have a 2004 Chevy Silverado 1500, 4.8L engine, 4x4, single cab, 6' bed, what are the torque specs for the drive shaft bolts that bolt the drive shaft into the rear end yolk? PINION NUT GM 7.5 8.5. Unfortunately, unless you have the two units side by side, it is nearly impossible to tell them apart. 2008 Sprinter 2500 170 - camper van. 14 bolts and 10 bolts are different, not sure about changing seals though. Allstar Pinion Nut GM 7.5 8.5 ALL72156. With the carrier removed w/ new bearings pinion bearing preload should measure a rolling torque of 20-30 in/lbs. Skip to main content. For a better experience, please enable JavaScript in your browser before proceeding. What is the torque specs on pinion nut? Introduction. If you installed a new seal, add 1 or 2 in-oz. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.). The inch pound rating is the force required to turn the pinion after the crush sleeve has been crushed. I thought the pinion nut would be more like 50-75 FOOT pounds? You can replace the pinion seal without changing the crush sleeve. It also has an inner diameter of 1 . The rear end is full of it. This ring and pinion install kit comes with new pinion bearings, carrier bearings, races, crush sleeve, pinion nut, pinion seal, a gasket and even has the gear marking grease included. Sie Bear Caps FT. LBS; AMC 20 Is that really all it takes? 8 to 11 in-lbs. An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut. Final torque on the pinion nut is necessary to compress the crush sleeve. 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. Setup Specifications. The distance between the lower center bolt on the cover and either adjacent bolt is 3 3/4 inches. If it takes a 5/16-inch wrench to remove it, its an 8.5. 7.25 12-14: 6-7: 6-10: 55: 50: 8 IFS: 12-15: 6-8: 6-10: 55: 60: 8.25 12-15: 6-8: 6-10: 55: 60: 8.75 - 41 Case: 13-15: 6-8: 6-10: 55: 90: 8.75 - 42 Case: 15-25: 7 . Call 800.979.0122, 7am-10pm, everyday. To begin, the yoke or coupler must be attached to the pinion shaft. An 8.2 (shown) will have the same contour as the cover. In this context, "hardest gear" refers to the ratio of front sprocket teeth to rear sprocket teeth - typically expressed as 4.55:1. These are two pinion gears for the 8.5-inch 10-bolt. Order our high performance synthetic oil and friction additive combo kit at time of order for ring and pinion or bearing overhaul kit and pay only $49.95 plus S&H, a $54.00 value. Nov 18, 2016. 1/2" x all lengths 100-110 ft lb. for new bearings. DIFF MODEL. 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. Yukon Gear's Pinion Nut makes any job more efficient by ensuring your parts remain secure while providing superior protection from contaminants. When it comes to suspension, preload is an important factor. A 2.6-3.0 gear ratio range is perfect for flat places and most people find this ratio suitable for their needs. Mine is leaking. There were an untold number of 8.2-inch axle assemblies built, and although it is only marginally stronger than the 7.5-inch rearend, it does have some aftermarket support. The control arm-mounting ears on top of this 7.5 rearend denotes it is usable for any 1978-88 GM A or G-body intermediate like a Cutlass, Monte Carlo, El Camino, Malibu, Regal, or Grand Prix. on new bearings, or 1.2 Nm (10 inch lbs.)
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