The 12-bolt is generally considered to be the stronger of the two rear axles. RING GEAR TORQUE FOOR LBS. 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. This sleeve must be replaced every time the pinion nut is torqued. Quaility Gears provide guaranteed performance. Take Zach R. for instance. To reach an accurate level of tension or preload, experience and expertise are usually required when dealing with this type of repair work. 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. GM 10 Bolt 8.2; GM 10 Bolt 8.5; GM 12 Bolt 8.875; GM 8.6 IRS; GM Install Kits; MOPAR. By Albert. Read More. Pinion preload (new bearings): 17 - 30 in*lb. The 7.5 rearend uses an oval cover and the housing has two small cast-in protrusions near two of the bottom cover bolts. This heavy duty nut has been designed using high grade steel and features a zinc plated finish for maximum protection against rust and corrosion. 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. JavaScript is disabled. Gear oil is nasty stuff, mostly in smell. West Coast Differentials has been distributing quality differential and axle parts since 1982. There are several differentials for the 10-bolt rearend. Tighten nut until it takes 15-20 inch lbs of torque to rotate the pinion bearings: None: Self Locking Nut . 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. Unfortunately, unless you have the two units side by side, it is nearly impossible to tell them apart. This ensures all parts remain tightly fitted together without any space between them, resulting in increased stiffness as well as reduced friction within the system as a whole. Shop Differential Pinion Bearing Spacers and Sleeves at Summit Racing. Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. All rights reserved. Date and location of manufacture are stamped in the axle tube, and this table deciphers the code. While backlash is a necessary component of manufacturing tolerances, it can be a significant source of problems for certain applications. 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. If it takes a 1/2-inch wrench to remove it, its an 8.2. Mgrotel, nice cliff notes. 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. Ultimately, both engine power and torque play important roles in determining a cars performance capability as well as its overall efficiency. Our LS swap adapter kits make it easy! GM 10.5" 14 Bolt: 20 to 35 in-lbs. In either case, it is important that this critical adjustment be performed correctly in order to avoid costly repairs or replacements down the line. All 8.6-inchrears have disc brakes, and 8.5-inch units have drum brakes. New bearings 19 to 22 inch pounds. I have a 1993 Suburban K1500. I agree that the preload needs to be about 30 inch pounds. Thanks Mike, Id appreciate it. range. When it comes to Chevrolet rearends, its the 12-bolt that seems to get all the accolades. This is especially true when it comes to cycling. Like most 10-bolts, the axles are held in place by C-clips on the inner end of the axles. GM 8.5 10 bolt - 10 bolt cover with 8.5 ring gear. Continue tightening the pinion nut to collapse the spacer and preload the bearings. Replace original worn or damaged nuts each time a gear set is changed. This difference can cause issues with accuracy and repeatability in some applications, necessitating either higher-end components or additional compensation mechanisms. Edit: When working on the assembly of a differential, there are two methods for adjusting the pinion depth. These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. We started by getting a rebuilt kit from Motive Gear . 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. As a result, this construction became one of the most popular axle assemblies on the market due to its durability and affordability. It also uses a 10 5/8-inch irregular-shaped cover. Dana 60. Most 8.2 factory covers also have the strangeprotrusionat the top. 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. The engine roars and the tires dig into the pavement as they work to move your car forward, pushing you back into your seat with tremendous force. The pinion nut should then be secured and tightened until there is no bearing play at all. If it takes a 5/16-inch wrench to remove it, its an 8.5. 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. Pinion Nut (Solid Spacer) 28-Spline Pinion - 200 ft lbs. Alternate Description. Mikz86TA. Torque measures the amount of force that is generated when the engine rotates at a certain speed. 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. The distance between thebottom center bolt in the cover and its adjacent bolts is 3 1/4 inches. PINION PRELOAD NEW INCH LBS. It refers to how much tension is applied to the spring before it's installed in the vehicle and can be adjusted accordingly. Crankshaft Main Bearing Cap Bolts 70. 2008 Sprinter 2500 170 - camper van. I have been taking it to ~250-300 ft lbs. 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. If you are installing an axle and need to know the torque specs, it is important to first understand what torque is. This ring and pinion setup guide is Copyright Crawlpedia.com - Please provide a link back to this page when copying. 2 ways. 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? 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. does anyone know the torque specs for a 10 bolt 7.5 for the pinion and carrier caps . This tension is achieved through a collapsible spacer which is placed between the bearings and then compressed by turning the pinion gear nut. 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. Connecting Rod Cap Nuts 38. If you locate a rearend that has coil spring perches, it could be from a G, A, B-body, or El Camino. Next remove the nut and change the seal. If sticky tires are used, youll quickly turn the 7.5-inch rear into a pile of unusable parts. Ford 9 inch torque specs; Gear Ratio Calculator; Order Forms. This method works every time is done precisely as described. 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. Well show you what to look for in this buyers guide. BACK LASH 0.000". For the street/strip car, the 10-bolt rearend is a great choice. DANA SPICER: .035. 1989 Toyota Pickup/3vze/R150F/Dual RF1A's/8.0 Detroit/8.0 Detroit/5" SAS/38 TSL'S. Speedway Motors employees enjoy not only helping our customers, but also turning some wrenches in their downtime as well. If your just swapping the pinion yoke out or putting in a new pinion seal and your re-using the old crush collar, just tighten the nut back down till ALL the slop is gone and then tighten about a 1/4 turn more to make sure there is tension on the old crush collar. :yipi: Thats it?? . 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 : . What is the torque specs on pinion nut? Sie Bear Caps FT. LBS; AMC 20 1. 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. 9 Minutes Read / You will also notice the large, flat, cast-in protrusions at thefive andseven oclock positions. 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. Crankshaft Pulley to Hub Bolts 37. JavaScript is disabled. 1988 C1500 Silverado, 5.7L with some go fast parts. This will ensure that your backlash is correct without having to swap the shims. Part Number. Thick Gears and Carrier Breaks - Thick ring and pinion gears and differential carrier breaks explained. Next, attach the pinion nut onto the end of the shaft and use a torque wrench to tighten it to between 110-125 ft/lbs of torque. For a better experience, please enable JavaScript in your browser before proceeding. Axle Order Form; Floater Axle Order Form; Custom Driveshaft Order Form; . 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 . 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 . 6 TO 10. Ford 9 inch Torque Specs for Ford 9 inch center Section torque specs. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles. Use the blue medium strength on the retaining bolt and the red on the others. 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. That being said, limited gear sets are offered for the carriers, especially if you plan to change gear ratios. Zone 1.5 BL, 22x12s, California delete, Detroit TrueTrac, etc. I have a 2001 2500 HD. Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. Good luck finding one of these, however, as they are very popular among performance enthusiasts. The retaining bolt can be hard enough to get out without using the red high strength Lock Tight on it. The first is to use a crush collar; this involves applying pressure between the yoke and cup until it reaches the desired depth. 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. Torque Specs on Dana 60. 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. So, in order to adjust the pinion bearing pre-load, shims of varying thicknesses are inserted into pre-load retainers. Sometimes, you need to push yourself. If you're looking to get the most out of your pickup truck, you may want to consider changing the gear ratios. As well as many other third member torque specs from Strange. Pinion nut has no torque spec. http://www.gmfullsize.com/forum/showthread.php?t=41717&highlight=pinion+seal. 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 axle shafts are also held in place by four-bolt retainer plates at the outer bearing, not C-clips. The Hex is 5/16 the threaded part is SAE 5/16 inch 18 threads per inch. Dana Technical Service Specs. The more torque produced, the less energy needed to move the car forward. Is a GM 10 bolt rear end good? 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. It is important to have the right pinion nut for your 8.5-inch 10-bolt rearend. Oct 29, 2001. The reliability of the axle tube and . Upgrade your cam, intake, headers, stall converter, and the list goes on from there. 2/3 drop, HP Tuned, Built 60e, 4.10s, Yukon Duragrip, etc. . These are considered highway gears that are good for top speed, not for off-the-line performance. CAP TORQUE. DIFF MODEL. 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. I have a leaky pinion seal and housing seal so I am planning on replacing the seals in the very near future. 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. Additionally, it increases load capacity because it prevents misalignment due to vibration or thermal expansion of components. How Much Hp Can Stock 5.3 Injectors Handle, What Kind Of Gas Does A Jeep Cherokee Take, Popping Noise When Accelerating And Braking. Choosing a higher ratio will provide more power and torque for pulling heavier loads or navigating steep grades with ease, while lower gears are better suited for those tackling long stretches of open highway or cruising around town at slower speeds. Crankshaft Pulley to Crankshaft bolt 77. 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. 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. The inch pound rating is the force required to turn the pinion after the crush sleeve has been crushed. Tightening Torque Clamp Load (lbs.) havent done it, but i have the haynes repair manual and ill type out the steps for you, may take me a second though. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. This is zero backlash. Since listing them all within this article is impossible, well be focusing only on visual identification. Only 1 nut, it all depends on if your using a new crush collar or not and if your just swapping out the pinion yoke or a full rebuild. with an impact. Next we disassembled everything, starting with the cross pin bolt, cross pin and C clips. We look forward to serving you! When I changed all the bearings in my suburban rear end, I bought the crush sleeve eliminator shims from Summit. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. 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 . GM 8.5" 10 Bolt / Ring & Pinion Gear Set w/ Master Bearing . 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. On the other hand, reducing the size of the pinion or increasing the size of spur gear will result in decreased top speed but with an increase in acceleration. Part Number. Set the preload carefully (see "Set Up Specifications") so that the bearings will have a long life. 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. The number of teeth on each of these gears determines how much rotational force is converted into torque or speed. I then assembled the pinion, inner bearing, shim pack in the carrier then pressed on the outer bearing using a 20 t press then installed the yoke washer and nut. The closer the teeth count is between the two gears, the higher the speed output will be; conversely, if there is a greater difference in tooth count, then more torque will be generated. You tighten it until the bearing preload is correct. 8-10 ft lbs: None: None: GM 12 Bolt Car: Torque: Lubricant: Thread Locker: Main Caps: OEM Housing: . I thought the pinion nut would be more like 50-75 FOOT pounds? Once the specified preload has been obtained, make sure the bearings are seated by rotating the pinion several times. Rightfully so, because when comparing the 10 and 12-bolt units, its definitely the more durable of the two. This is in contrast to high-end torque, which describes how much power and force is produced by an engine at higher RPMs, such as 4000 or 6000. The OEM pinion nut is 1 1/4 inches. By continuing to use our website, you agree to our Privacy Policy. for new bearings. Failure to apply enough preload on the bearings can have an adverse affect on gear contact patterns. PINION NUT GM 7.5 8.5. on new bearings, or 1.2 Nm (10 inch lbs.) 1989 GMC Suburban SLE 2500 4WD 5.7L Granny 4-speed. The PYN10 is a 30 spline pinion nut designed for this purpose, and it is specifically made to be used with vehicles that have a 30 spline pinion in their 10-bolt 8.5" rear end assembly. GM 8.6" gears will fit GM 8.5" axles and as such have become the universal aftermarket size for both. The 8-inch rear axle looks very much like the popular Ford 9-inch rear axle. 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. One thing often overlooked is the RTV sealant that needs to be applied to the splines (otherwise rear end grease can leak past the splines), and locktite on the new pinion nut. Before disassembly, we marked the bearing caps and kept the side bearing shims on the correct side. Not sure what to do here but I know I'm looking at a boat load of parts I do not have the money for right now so not sure what the hell I'm going to do. Setup Specifications. .006" to .010" 120 ft-lbs. The date and location of manufacture coding changed in 1971. 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. Now that we know our pinion depth shim is correct we can do the final assembly. Axle Type Cover Bolts FT. LBS. 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.
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