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. Depending on what you're using it for, there is an axle size to suit; 7.5/7.625-, 8.2-, 8.5- or 8.6-inches from smallest to largest respectively, so no matter how much horsepower you need to support, there is an option available to fit your needs perfectly and provide excellent strength and reliability even under heavy loads and high speeds. Is a GM 10 Bolt rear end good? Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear. 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. The 10-bolt GM rear end has been used in many different applications since its introduction in 1968 and continues to be highly regarded as one of the toughest axles available today due to its proven durability and versatility over decades of use in a variety of situations requiring extreme performance requirements from street racing too off roading adventures. All 8.6-inchrears have disc brakes, and 8.5-inch units have drum brakes. Dana 60. 3/8" x all lengths 45-50 ft lb. 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. If sticky tires are used, youll quickly turn the 7.5-inch rear into a pile of unusable parts. Used bearings 10 to 14 inch pounds. This process must be done carefully, gradually increasing the tightness of the nut in increments until it reaches the desired torque level required to rotate the pinion correctly. The pinion nut is a 32mm or 1 1/4" so you need a socket and adapters for that. I have seen street 12 bolts that . Jul 2, 2020 / Once properly secured in place, you should have no further issues with your pinion nut installation. Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. If i missed any thing PLEASE tell me. Since it was so widely used, there is a better possibility of finding one of them at a salvage yard thanlocating a 12-bolt. 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. Our stock 10-bolt was plenty stout to withstand the torture of 165 hp from the ZedSled's stock 350 (yes, that was sarcasm), but we're looking down the barrel at 500 hp from our cammed-up 6.0 swap . FOR 1994-2001 CHEVY S10's & GMC SONOMA's. **ALL TORQUE SPECS ARE PER GM FACTORY & HAYNES MANUAL**. The 8.5 rearend will have a round cover, and part of the cover will extend rearward to make room for the ring gear. MOPAR: 8.75" x 1.75" pinion: .090. . It has been proven to be reliable in high-performance and high-horsepower applications, but it can also handle occasional abuse from use on the racetrack. This will ensure that your backlash is correct without having to swap the shims. The 8-inch rear axle looks very much like the popular Ford 9-inch rear axle. Ring and Pinion Ratio Variations - An explanation of why some ring and pinion gear ratios vary. Constructed from high quality steel, the PYN10 features an integral washer design that ensures proper alignment of the bearing preload during installation and prevents damage to both the yoke and bearings. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? This sleeve must be replaced every time the pinion nut is torqued. Differential Locker Comparison - A detailed comparison of popular differentials and lockers. I thought the pinion nut would be more like 50-75 FOOT pounds? 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. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. I need the torque on the pinion nut for the rear differential. grade 8. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! Learn more about GM steering column identification, GM steering column lengths, and GM steering column compatibility. There are other 14b axles out there - a 9.5" ring gear semi-float for one, and even a 11.5 . PINION PRELOAD NEW INCH LBS. It is important to note that if possible, it is best practice to use an old or used pinion nut for this operation, as new ones can often bind when tightened too much. Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. Ring gear bolt torque: 110 ft*lb. Once the specified preload has been obtained, make sure the bearings are seated by rotating the pinion several times. The 8.5-inch 10-bolt rearends have ten 3/4-inch hex head bolts with 7/16-20-inch left-hand thread bolts that hold the ring gear to the carrier. Pin. Pinion Nut Size: 1-1/4" Featured Products: GM 8.2"/8.5"/8.6" (Chevy) 10 Bolt / Aluminum Girdle Cover / TA Performance / TA_1807 . Good luck finding one of these, however, as they are very popular among performance enthusiasts. 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. It's got a 350 with a 10-bolt rear end. While the 8.5-inch rearend was used on vehicles up to 1999, The 8.6-inch (8.625) was used on 2000 and later-year trucks. Find out how to access AutoZone's Torque Specifications Repair Guide for 300, 300C & Magnum 2006-2008, Charger 2006-2008. Introduction. Mine was a pita. 1/2" x all lengths 100-110 ft lb. With its strong construction and corrosion resistant coating, the PYN10 provides reliable performance for years to come, making it one of the best choices you can make when securing your vehicle's rear axle assembly. New bearings 19 to 22 inch pounds. Call 800.979.0122, 7am-10pm, everyday. When additional shims are added, this increases the total width of the retainer assembly, pushing the bearing cones further away from their respective cups and as a result reducing drag on them. The pinion nut is designed to securely fasten the components together while also providing an effective seal against contamination from dirt, dust and other debris. ExtCab96S_Dime . 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. If too tight, the bearings become overstressed and will fail prematurely, causing a catastrophic failure of both the ring and pinion gears. Many times, if you locate a 10-bolt rearend, its usually a 7.5-inch unit. Randy Bolig has been working on cars and has been involved in the hobby ever since he bought his first car when he was only 14 years old. 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. Reply Quote. GM 14 Bolt Specs (all data for SRW truck 14 Bolt axle - others may vary - see table on "different 14 bolts" below) . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Here are the thin shims from the Summit crush sleeve eliminator. carrier bearings, races, crush sleeve, pinion nut, pinion seal, a gasket and even has the gear marking grease included. While a carrier-bearing girdle is available for the 8.2-inch rearend and does give some support to the housing it doesnt provide a reliable and suitably strong solution. We have your differential parts in stock ready to ship today. you have it pretty much. 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. Once you give everything a thorough inspection you can begin the re-assembly process. Therefore, when building a performance car or truck that will be subjected to higher than normal stresses and torque loads, such as those produced by high horse power engines or increased traction created by sticky drag racing tires, it may be beneficial to choose a 12-bolt instead of a 10-bolt axle assembly in order to ensure maximum strength and reliability. 14 TO 19. 2008 Sprinter 2500 170 - camper van. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Back off left-side adjusting nut approximately 2 slots. How involved is the process of changing it? This means that turning the pedals at the front will turn the back wheel 4.55 times over, which requires quite a bit of effort but allows for fast movement once achieved. Inside, the ring-gear bolts are the same as the 8.5 corporate unit, but the pinion-shaft diameter measures 1.438 inches. The torque required to seat the nut is very large, possible 200 ft-lbs or more. The following table contains the proper specifications for all popular axles. 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? The distinction between these two types of torque can be useful for assessing how well a car will perform in different situations: cars with higher levels of low-end torque are typically better suited for starting from standstill or accelerating quickly; whereas cars with greater amounts of high-end torque are likely more suitable for reaching faster top speeds over long distances. This tension is achieved through a collapsible spacer which is placed between the bearings and then compressed by turning the pinion gear nut. 3.08 and numerically lower gears = 1.660-inch, 3.23 and numerically higher gears = 1.950- inch, 2.73 and numerically lower gears = 1.615-inch, 3.08 and numerically higher gears = 2.00-inch, 2.56 and numerically lower gears = 1.530-inch, 2.73 and numerically higher gears = 1.720-inch. It doesn't have to be hard, and we offer some tips to keep your car's finish in top shape. Crawlpedia is an off-road encyclopedia featuring a complete list of proper ring and pinion gear set up torque and backlash specs. For the street/strip car, the 10-bolt rearend is a great choice. 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. range. When installing a new 8.5-inch 10-bolt rear differential, it is important to use the right pinion nut for your application. 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 : . FSM says 181-325 ft-lbs. This is a metal spacer, usually made of brass or aluminum, that is used to put tension between the bearings in order to keep them properly spaced and aligned. By Albert. The "feel" people are way more experienced that you or I so the top one is re-commended. You will need to know that there are different series of differentials (seriestwo and three). With its superior strength and durability, you can count on your PYN10 pinion nut to remain securely in place for years of reliable service. and 12 bolt #s. found these #s at Richmond Gear: Torque specifications. This is done in order to decrease pre-load on the bearings; adding more shims will have an overall effect of decreasing it. We look forward to serving you! Unfortunately, once the tension on this type of sleeve has been released during installation it cannot be re-used since it will no longer hold the proper tension. when assembling the pinion into place, include the crush sleeve between the two pinion bearings. if it is under twents hold the yoke with a pipe wrench and tighten just a little at at time till the torque wrench reads a constant 20 inch pounds for the revolutions. Our Mopar flexplate buyers guide will help. I have a 1993 Suburban K1500. That does not describe how tight the pinion nut needs to be however. Original gear ratios in pickups can range from 2.41:1 all the way up to 4.10:1, offering a wide variety of options depending on your needs and preferences. How do you fix a loose pinion bearing preload? 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. If the backlash is too tight, you'll need adjust the carrier shim by moving it away from the pinion. 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. #5. The 12-bolt is generally considered to be the stronger of the two rear axles. Edit: It was used in different models by all GM divisions with the exception of Cadillac. This axle was found in various vehicles from Chevrolets and Pontiacs to Oldsmobiles and Buicks with some of these models continuing production well into the early 80's. Camshaft thrust Plate bolts 106 in-lbs. Thats usually proven when used in high-performance, high-horsepower applications. See all 36 photos. Pinion nut torque (shimmed preload style): 250 ft*lb. Alternatively, shims can also be used to adjust the pinion depth. The PYN10 pinion nut has been specifically designed to fit 30 spline pinions and provide a secure fit and lasting performance. On the other hand, if preload is too tight then you'll need to take out the pinion gear and add extra shims in order to reduce bearing pressure against the races. Since listing them all within this article is impossible, well be focusing only on visual identification. LBS. We were lucky and had a desirable contact pattern on both the drive and coast sides of the gear teeth. By following these steps carefully and precisely, you can ensure that your gear and carrier are set up correctly for optimal performance. Pinion nut has no torque spec. Ring Gear Backlash Ring Gear Bolts to Cast FT. LBS. It refers to how much tension is applied to the spring before it's installed in the vehicle and can be adjusted accordingly. It has a black oxide finish that ensures corrosion resistance while its construction of hardened steel ensures durability even under extreme conditions. You can replace the pinion seal without changing the crush sleeve. If used in a daily driver or cruiser application, the 7.5-inch rearend should survive behind an engine with 350hp, if traction is limited during spirited driving. As a result, this construction became one of the most popular axle assemblies on the market due to its durability and affordability. 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. West Coast Differentials stocks a complete line of light duty axle parts for Chevrolet, Chrysler, Dana, Ford, GM, Jeep and Toyota and more! 2/3 drop, HP Tuned, Built 60e, 4.10s, Yukon Duragrip, etc. It has to be drained to get a peak inside. Reports from multiple Chevy Bolt owners confirm that on May 28th, 2021, Chevrolet began taking steps to rectify any potential issues with these cars by paying off the original cost and allowing them to be taken off of the road. A full range of pinion gears is offered for the Chevy 10- and 12-bolt axle assemblies so you are able to select the correct gear set for your vehicle, application, and setup. See other Red Line Oil Products that we recommend. The only torque you should be concerned with is the torque it takes to rotate the pinion gear alone, 8-14 inch pounds for old bearings, 16-29 in/lbs. If in doubt, consult our staff of differential parts specialists. GM 10 Bolt 8.2; GM 10 Bolt 8.5; GM 12 Bolt 8.875; GM 8.6 IRS; GM Install Kits; MOPAR. When it comes to suspension, preload is an important factor. I agree that the preload needs to be about 30 inch pounds. CHECK FREQUENTLY as you progressivley tighten the pinion nut. Step 2: Back off, then torque to 35 (lb-ft) for automatic hubs,or 50 (lb-ft) for manual hubs. Is a GM 10 bolt rear end good? In this context, "hardest gear" refers to the ratio of front sprocket teeth to rear sprocket teeth - typically expressed as 4.55:1. When changing a ring & pinion and doing final install of pinion there is no torque spec on the pinion nut itself. It's essential that you use enough force while tightening down the pinion nut so that your component will stay securely attached; however, it's equally important not to over-torque the part, which could cause permanent damage or deformation. 3. remove yoke from splines. 2429 Mercantile Drive Suite A 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. Just out of curiosity,what are the 8.5 (r 65lbft & c 60lbft ?) First I measured the old crush sleeve as a starting point. It is therefore important to strike a balance by carefully adjusting the backlash so that it meets manufacturer requirements for that particular differential system. in order to compensate for the drag of the new seal, the nut should be tightened more until the rotational torque of the pinion slightly exceeds what was recorded earlier, but not by more that 5 in/lbs. 35-Spline Pinion - 250 ft lbs. The LS swap is no doubt still going strong, but if youre planning to run an automatic behind your 4.8, 5.3, or 6.0L LS-powered ride, youll need to pay attention to a few items we discuss in this buyers guide. TORQUE-TENSION REFERENCE GUIDE Printed in U.S.A. Supply Part Number: 9702365 AS 06/14 Torque Poster . Good info on this site from what I've seen so far, kudos. As well as many other third member torque specs from Strange. Talk to the experts. However, the gears will not interchange with a Chevy 8.2. 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. For 30 spline pinion axles, PYN10 offers a 10-bolt 8.5" pinion nut that is designed to provide secure and reliable performance in the toughest of conditions. Not only will you be getting the best quality performance with JEGS Pinion Nut, but you'll also have the convenience of knowing it's made to fit GM 8.875 inch 12-bolt car and truck axles. 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. Thick Gears and Carrier Breaks - Thick ring and pinion gears and differential carrier breaks explained. On the other hand, if your backlash is too wide you will need to adjust by moving the carrier towards the pinion with a similar measurement technique. 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.
