This procedure is necessary in order to ensure that everything within the drivetrain is working correctly and efficiently. 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. Before disassembly, we marked the bearing caps and kept the side bearing shims on the correct side. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. For a better experience, please enable JavaScript in your browser before proceeding. 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. By Albert. A forum community dedicated to all General Motors truck owners and enthusiasts. When working on the assembly of a differential, there are two methods for adjusting the pinion depth. Im gonna go buy a good manual for shit like this. This is done in order to decrease pre-load on the bearings; adding more shims will have an overall effect of decreasing it. See other Red Line Oil Products that we recommend. 1. 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! I have seen street 12 bolts that . As well as many other third member torque specs from Strange. This applies to all types of vehicles with any type of gearing system regardless of pitch or size it doesnt matter which one you change as long as you can adjust it accordingly. The specified preload needs to be obtained by carefully crushing the spacer with just enough force from turning the pinion nut in order for it not to be too loose or too tight, as either one can cause serious damage if done incorrectly. Tightening Torque Clamp Load (lbs.) Unfortunately, you cannot rely on this torque because the crush sleeve provides unpredictable and non-linear resistance as it buckles and crushes. It also has an inner diameter of 1 3/16", allowing it to accommodate most 30 spline yokes without any extra modifications or components needed. Is a GM 10 bolt rear end good? A higher engine power combined with more torque enables cars to accelerate faster while using less fuel - making it much more efficient and cost-effective in the long run. GM: .035. That does not describe how tight the pinion nut needs to be however. It also has an inner diameter of 1 . (note make sure the pinion bearing is well oiled when doing this procedure.) You can use this instead of the crush sleeve. I like to slowly tighten the new pinion nut until I take up all of the front to back free play. range. I thought the pinion nut would be more like 50-75 FOOT pounds? 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. It is important to have the right pinion nut for your 8.5-inch 10-bolt rearend. Since listing them all within this article is impossible, well be focusing only on visual identification. Just get a couple sacrificial pinion bearings and open them up a little so you don't have to press them on and off the pinion and add/remove shims until you get the correct preload shown on page 2 of the set up manual. 7/16" x all lengths 60-65 ft lb. without any detrimental effects occurring. grade 8. This is an 8.2 BOP axle. These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. Just out of curiosity,what are the 8.5 (r 65lbft & c 60lbft ?) MOPAR: 8.75" x 1.75" pinion: .090. . This website uses cookies or similar technologies to enhance your browsing experience. It doesn't have to be hard, and we offer some tips to keep your car's finish in top shape. Is a GM 10 bolt rear end good? ExtCab96S_Dime . OEM bolts have thread locker on the threads. Its strength and durability make it an ideal choice for those who want to take their car out for some fun on the track without having to worry about its performance or reliability. 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. Just think, now when you and Drew drive out to Moab, you can sit and take a nap every other time Drew has to fuel. You Make The, SEMA 2022: GEARWRENCH Leveled Up With Distinct Quality Hand, Reignite Your Cat Eye Silverado Headlights With, SEMA 2022: Paragon Corvette Adds Performance Parts To, PRI 2022: FuelTech Talks About The Tech Of The FT700, PRI 2022: Concept Performance Now Offers Aluminum LTR, PRI 2022: Get Locked In With Forgeline Beadlock, Creative Automotion: The Art of Farmtruck &, Randy Bolig The Media Mover And Shaker Behind Chevy, How Ken Lingenfelters Love for Corvettes Benefits So, Shop Tour: Prestige Motorsports Is Your One-Stop Hot Rod, Full Factory Tour: How Edelbrock Makes Its Cast Aluminum, HOLY SHIP! The 12-bolt is generally considered to be the stronger of the two rear axles. 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. Good luck finding one of these, however, as they are very popular among performance enthusiasts. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. In most cases, however, even with a straight case, a certain degree of backlash can be tolerated up to 0.005? West Coast Differentials stocks a complete line of light duty axle parts for Chevrolet, Chrysler, Dana, Ford, GM, Jeep and Toyota and more! It also uses a 10 5/8-inch irregular-shaped cover. Is that really all it takes? 5. put back together and tight pinion nut to specified torque. Automotive Chassis Torque Specs. The pinion nut needs to be torqued to 250 ft/lbs. By continuing to use our website, you agree to our Privacy Policy. 8 & 9 BOLTS Locknut Size Threads per inch Steel Hex Locknut Steel Hex Flange Nut Grade C FNL Grade 9 Grade F Grade G Clamp Load (lbs.) But, did you know there is more than one style of 10-bolt rearend? 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. sny 00235 converted VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Shop for New Auto Parts at 1AAuto.com http://1aau.to/c/553/e/driveshaftThe differential Pinion Flange is part of the universal joint that connects the drive . I have been taking it to ~250-300 ft lbs. By following these steps carefully and precisely, you can ensure that your gear and carrier are set up correctly for optimal performance. http://www.gmfullsize.com/forum/showthread.php?t=41717&highlight=pinion+seal. Crankshaft Pulley to Crankshaft bolt 77. For the fastest service, call our Differential Parts Experts at (800) 510-0950 for immediate assistance. A Series 2 carrierwill work with 2.56 and higher gears (numerically lower) such as 2.41. 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 torque required to seat the nut is very large, possible 200 ft-lbs or more. If a bearing system is designed to have no clearance, then preloading is necessary. BACK LASH 0.000". Give us a try, we think you'll be glad you did! 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. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. Recently a friend enlisted me to help rebuild his 7.5 GM 10 bolt. Pinion preload (new bearings): 17 - 30 in*lb. The inch pound rating is the force required to turn the pinion after the crush sleeve has been crushed. 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. JavaScript is disabled. 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. Tighten to 8 ft-lbs (10 N-m), then tighten an additional 1/3 turn to at least 37 ft-lbs (50 N-M). The rotating torque must be 2 to 3 N-m (15 - 25 inch pounds). FSM says 181-325 ft-lbs. 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. By Albert. Date and location of manufacture are stamped in the axle tube, and this table deciphers the code. DIFF MODEL. 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. 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. It's not easy, but pushing yourself can be rewarding; after all, with hard work come great rewards! If too tight, the bearings become overstressed and will fail prematurely, causing a catastrophic failure of both the ring and pinion gears. This is zero backlash. You will also notice the large, flat, cast-in protrusions at thefive andseven oclock positions. Replace original worn or damaged nuts each time a gear set is changed. 8-10 ft lbs: None: None: GM 12 Bolt Car: Torque: Lubricant: Thread Locker: Main Caps: OEM Housing: . Pinion Nut FT. LBS. The 8.5-inch 10-bolt rearend was used in cars and trucks over a wide range of years. Looking for a driveshaft for your 67-72 C10? The following are recommended Differential Set-Up Specifications for various differentials. By reducing the amount of free play between components, preloaded bearings can provide greater accuracy and quieter operation than standard ball bearings with clearances. 2 ways. 8-Inch Ford Rear End Torque Specifications. Pinion preload (used bearings): 8 - 10 in*lb. With the carrier removed w/ new bearings pinion bearing preload should measure a rolling torque of 20-30 in/lbs. Some of the most popular GM vehicles have come with 10-bolt rear ends. Axle Order Form; Floater Axle Order Form; Custom Driveshaft Order Form; . In this context, "hardest gear" refers to the ratio of front sprocket teeth to rear sprocket teeth - typically expressed as 4.55:1. 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. Zone 1.5 BL, 22x12s, California delete, Detroit TrueTrac, etc. After that we removed the old bearings and cleaned all the parts up in the solvent tank. It also uses a 10 5/8-inch irregular-shaped cover. I agree that the preload needs to be about 30 inch pounds. When compressing the crush sleeve, many guys use an impact wrench and end up crushing it too far, ruining the sleeve. you have it pretty much. 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. It refers to how much tension is applied to the spring before it's installed in the vehicle and can be adjusted accordingly. This versatility makes it a great choice for those who want to take their car from the street to the track without worrying about its durability. In addition, if the sleeve is over-crushed during installation then it must also be discarded and replaced with a new one as crushing it too much can cause damage to other components within your transmission. 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. checking the pre load with the inch lb torque . Uses 28 or 30 spline c-clip axles. The concept of low-end torque is an important one for drivers to understand when it comes to the performance of a vehicle. There is no way to happiness.happiness is the way. Would this be the same How to write up for my truck? Are all GM 10 bolts the same? Lifted78Chevy. 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. 2008 Sprinter 2500 170 - camper van. 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. Have a seal puller if possible, makes getting the old one out a lot easier. Gear Ratio Calculator - Calculate the gear ratio of gears based on their tooth count. 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. If you locate a rearend that has coil spring perches, it could be from a G, A, B-body, or El Camino. Ring and Pinion Gear Tooth Patterns - Gear tooth pattern setup and adjustement instructions. 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. 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. Backlash refers to the distance between two mating gear teeth when they are not engaged. When riding a bicycle, the hardest gear available is sometimes necessary for tackling steep climbs and flats alike. The oval-shaped cover measures 8 5/16 inches by 10 9/16 inches. Save Share. There are several differentials for the 10-bolt rearend. He is resurrecting a G-Body Chevy Monte Carlo and decided to reuse the original 3.73 gears and a factory GM posi unit. The rear end is full of it. To install your ring and pinion gears and/or differential correctly, it is critical to torque your bolts and set your preload and backlash correctly. I have a 1993 Suburban K1500. 1/2" x all lengths 100-110 ft lb. The date and location of manufacture coding changed in 1971. does anyone know the torque specs for a 10 bolt 7.5 for the pinion and carrier caps . On the other hand, if there is too much backlash then this will also lead to excessive mechanical wear due to increased friction and noise as the teeth continually rub against each other. You tighten it until the bearing preload is correct. These have been around since 1975, and were installedunder cars, small trucks, and vans up to the 2005 model year. This sleeve must be replaced every time the pinion nut is torqued. By manipulating these two components and their ratio to each other, you can achieve different levels of performance from your vehicle that may suit your individual needs better than stock settings would. stock 4L60E on 5th filter/fluid change; 2nd set of drive shaft u . Ring gear bolts 65 foot pounds, bearing cap bolts 60 foot pounds. Pinion nut has no torque spec. PINION NUT GM 7.5 8.5. Ring gear bolts. 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. Bearing Cap Torque (Foot Lbs.) One is the small, 7.5-inch, another is the 8.2-inch, and yettwo more are the 8.5 and 8.6-inch. 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. To do this, measure 10 thousandths of an inch on the shim and shift it accordingly. This will help ensure that there isn't an excess of tension on these components, which can lead to premature wear or even failure. 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. Crankshaft Main Bearing Cap Bolts 70. We have your differential parts in stock ready to ship today. Torque Specs on Dana 60. Connecting Rod Cap Nuts 38. 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. tighten the nut down till its snug and put on your torque wrench and turn it about 3 revolutions. The GM 8.5" 10 Bolt axle, also known as the GM 8.6" axle or GM 10-Bolt, is available in many front and rear axle . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! I got the price for the seal, and it is near $9. Too much won't hurt anything other than break the bolt. Preloading a bearing eliminates the clearance, which increases stiffness and reduces friction. Sometimes it feels like youre in a race car when you accelerate hard with a high-torque vehicle. 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. (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). Follow along as Zach works over the old 10 bolt and brings it back to life. There is a difference, but you cant see it unless you set both units on their side, and then measure the distance from that surface to the face where the ring gear attaches. From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. The reliability of the axle tube and . In addition, if a crush sleeve is over-crushed during installation then it must be discarded and replaced with a new one as it will no longer be able to provide the necessary level of tension between the bearings for them to function properly. 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 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. 2/3 drop, HP Tuned, Built 60e, 4.10s, Yukon Duragrip, etc. 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. Ford 9 inch torque specs; Gear Ratio Calculator; Order Forms. Ring Gear Diameter: 8.500Cover Bolts: 10Ring Gear Bolts: 10Ax . 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. Step 3: Back off 3/8-turn for automatic hubs, and just enough to free the bearing for manual hubs. GM 10.5" 14 Bolt: 20 to 35 in-lbs. 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 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. .006" to .010" 120 ft-lbs. 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. Pin. That way, you dont unknowingly spend money on something you really do not want. I have a leaky pinion seal and housing seal so I am planning on replacing the seals in the very near future. 14 TO 19. Jul 2, 2020 / 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. Once you give everything a thorough inspection you can begin the re-assembly process. The number of teeth on each of these gears determines how much rotational force is converted into torque or speed. 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. You have to do it a little differently though. What size is pinion nut Silverado? The pinion nut is a 32mm or 1 1/4" so you need a socket and adapters for that. This gives us confidence in the quality of the parts we sell. Our Mopar flexplate buyers guide will help. Torque is a measure of rotational force that must be applied in order to secure components such as axles and other parts together. Sometimes strength is an important factor when choosing between components, and this is true with the 10-bolt and 12-bolt rearends. Some pinion nuts require a special procedure to be properly installed. IMPORTANT: The pinion preload should be at or below 4 Nm (35 inch lbs.) 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. An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut.