pinion nut torque specs gm 10 bolt

GM 8.5" 10 Bolt / Ring & Pinion Gear Set w/ Master Bearing . 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. Many times, if you locate a 10-bolt rearend, its usually a 7.5-inch unit. 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. Pinion Nut Torque Spec. Uses 28 or 30 spline c-clip axles. 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. When working on the assembly of a differential, there are two methods for adjusting the pinion depth. Unfortunately, once this tension has been released the crush sleeve cannot hold it again. To reach an accurate level of tension or preload, experience and expertise are usually required when dealing with this type of repair work. This sleeve must be replaced every time the pinion nut is torqued. Not only has Chevrolet taken the initiative to buy back some of their 2017-2019 Chevy Bolt electric vehicles (EVs) due to safety recalls, but they have also gone above and beyond by reimbursing owners the full purchase price for their vehicle. High-Performance Differentials, Axles & Drivelines, How to Measure and ID Differetial Housings, Filling Trim Holes in Car Body: Sheet Metal Welding Tips, Q&A With Our Race Experts: Tuning and Maintenance Tips, Small Block and Big Block Chevy Engine Flexplate Guide, How to Adapt LS Engine to 700R4 or Turbo 350 Transmissions, Chevy C10 Driveshaft Length Measuring Guide, GM Steering Column Compatibility, Interchange & Repair Guide. For the street/strip car, the 10-bolt rearend is a great choice. 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. Ford 9 inch torque specs; Gear Ratio Calculator; Order Forms. Thats usually proven when used in high-performance, high-horsepower applications. A forum community dedicated to GMC and Chevy full size owners and enthusiasts. You can simulate pinion bearing preload by tightening the pinion nut until the proper amount of drag is felt with only motor oil on the pinion . Copyright 2023 Sierra Gear & Axle - Web Design by Zenxeon Technologies, Backlash for Aftermarket gears .006 -.012, Instructions Differential Installation & Setup, Differential Setup & Torque Specifications, GM RPO Codes Axle & Ratio Identification, Measurement Axle Shaft Length & Bolt Circle. 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. 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. The 8-inch Ford rear axle was used from the early 1960s to 1980 in small and mid-size passenger cars with six- and small-block V-8 engines. 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. It was used in different models by all GM divisions with the exception of Cadillac. The pinion bearing preload is an important component of the drivetrain system, as it works to ensure that the pinion gear's tapered bearings are running smoothly and efficiently. Additionally, it increases load capacity because it prevents misalignment due to vibration or thermal expansion of components. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. I have a leaky pinion seal and housing seal so I am planning on replacing the seals in the very near future. Once the specified preload has been obtained, make sure the bearings are seated by rotating the pinion several times. By Albert. 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. We started by getting a rebuilt kit from Motive Gear . This distance must be precise; if it is too small, the gears will bind together and cause mechanical stress which can lead to premature wear or failure. Race-spec ring and pinion gears for desert racing, rock bouncing, and rock . While engine power is an indicator of a vehicle's ability to accelerate quickly and reach high top speeds, torque is an indication of how efficiently it can move. The concept of low-end torque is an important one for drivers to understand when it comes to the performance of a vehicle. It said you want this to be from 5-35. . Inside, the ring-gear bolts are the same as the 8.5 corporate unit, but the pinion-shaft diameter measures 1.438 inches. All 8.6-inchrears have disc brakes, and 8.5-inch units have drum brakes. OEM bolts have thread locker on the threads. 9 Minutes Read / JavaScript is disabled. Tighten nut until it takes 15-20 inch lbs of torque to rotate the pinion bearings: None: Self Locking Nut . Ultimately, both engine power and torque play important roles in determining a cars performance capability as well as its overall efficiency. I have a 2001 2500 HD. Ring gear bolt torque: 110 ft*lb. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! Usually, when people are discussing gear ratios, theyre referring to the relationship between a pinion gear and a spur gear. 2/3 drop, HP Tuned, Built 60e, 4.10s, Yukon Duragrip, etc. If the nut is loose then the crush sleeve must be changed. Backlash = 6-10 (.001 inch) 2003 S-10 ZQ8 - 262/M5:bowtie: 1986 Pontiac Trans Am - 355/A4 The first is to use a crush collar; this involves applying pressure between the yoke and cup until it reaches the desired depth. There are a few that have geared axles on here so they should chime in and help out with Real TECH :rocking: Some of the most popular GM vehicles have come with 10-bolt rear ends. First mark the position of the nut with a chisel or other method so you can tighten it back to exactly the same place. lbs.) 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. If it takes a 1/2-inch wrench to remove it, its an 8.2. (note make sure the pinion bearing is well oiled when doing this procedure.) 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 8-inch rear axle looks very much like the popular Ford 9-inch rear axle. Alternatively, shims can also be used to adjust the pinion depth. 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. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. Oct 29, 2001. 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. does anyone know the torque specs for a 10 bolt 7.5 for the pinion and carrier caps . How involved is the process of changing it? This is done in order to decrease pre-load on the bearings; adding more shims will have an overall effect of decreasing it. I agree that the preload needs to be about 30 inch pounds. An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut. Read More. Give us a try, we think you'll be glad you did! Axle Retainer Plate Nuts: 3/8" T-bolts - 30 ft lbs. The torque it takes to crush . How a GM 10-Bolt Differential Goes Bad. Step 1: To seat, torque nut to 50 (lb-ft) while spinning hub. 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. Received 16 Likes on 13 Posts. EDLANTA there is a "crush" spacer between the two pinion bearings that when tightened properly gives you the proper bearing preload. By asking ourselves what makes us different than other companies, our answer is that we deliver the level of customer service that other companies only promise. That being said, it isnot recommended for use behind engines that make a serious amount ofhorsepower. 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. Reply Quote. Talk to the experts. Sometimes, pinion bearing preload can be a tricky procedure. Currie 60/70 : Torque . 1988 C1500 Silverado, 5.7L with some go fast parts. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. GM: .035. The 8.5-inch 10-bolt rearend is hugely popular because aftermarket carriers and gears are easily interchangeable. When the preload of the pinion bearings is incorrectly adjusted, it can have serious consequences. 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. GM 14 Bolt Specs (all data for SRW truck 14 Bolt axle - others may vary - see table on "different 14 bolts" below) . 14 bolts and 10 bolts are different, not sure about changing seals though. What is the torque specs on pinion nut? Differential cap bolt torque: 90 ft*lb. The Series 3 carriers are good for use with 2.73 and lower gears (numerically higher), so 3.08 and 3.73 gears work well. The 7.5 rearend uses an oval cover and the housing has two small cast-in protrusions near two of the bottom cover bolts. Automotive Chassis Torque Specs. Is a GM 10 bolt rear end good? These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. The date and location of manufacture coding changed in 1971. 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. There is no way to happiness.happiness is the way. Unfortunately, you cannot rely on this torque because the crush sleeve provides unpredictable and non-linear resistance as it buckles and crushes. Pinion Nut FT. LBS. PINION NUT GM 7.5 8.5. 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