Crankshaft Pulley to Crankshaft bolt 77. Thats usually proven when used in high-performance, high-horsepower applications. Differential Locker Comparison - A detailed comparison of popular differentials and lockers. Replace original worn or damaged nuts each time a gear set is changed. Thick Gears and Carrier Breaks - Thick ring and pinion gears and differential carrier breaks explained. There is no way to happiness.happiness is the way. Chrysler 300 and Dodge Charger 2006-2008 Torque Specifications Repair Guide. We believe that our exceptional customer service and product knowledge is what sets us apart from the competition. Sometimes, pinion bearing preload can be a tricky procedure. If rotating torque is low, tighten pinion nut in 6.8 Nm (5 ft. 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. How a GM 10-Bolt Differential Goes Bad. Pinion nut has no torque spec. 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. Mine is leaking. 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. For inquiries about our products and services, please fill out the form below. 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. It first appeared in 1970 production cars as a corporate replacement for the 8.2-inch 10-bolt rearend. JavaScript is disabled. Once properly secured in place, you should have no further issues with your pinion nut installation. If your mom is lunch, then yes, I've eaten lunch twice today. I don't use it on the bearing cap 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. 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. Record pinion flange rotating torque, with a torque wrench. Here's a link to when I did mine. Ford 9 inch torque specs; Gear Ratio Calculator; Order Forms. Whilethe 10-bolt rearendslineage can be identified by the code stamps, which are usually on the passengers side axle tube, there are literally hundreds ofpotential codes for the three different 10-bolt rearend housings. I like to slowly tighten the new pinion nut until I take up all of the front to back free play. The side bearing preload is the difference of preloads (5) x the gear ratio (3.73) = 18.65. This results in improved performance, longer life span and more efficient operation of the system. It saved me time and effort trying to crush a brand new crush sleeve. When looking at the housing from the rear, an 8.5 will have two squared off chunks of casting hanging on each side near the bottom of the differential. The reliability of the axle tube and . 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. 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 . 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. Introduction. 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. sny 00235 converted 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. 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. Backlash arises when two gear teeth mesh together in order to transmit power from one shaft to another; the teeth need some play to avoid jamming and ensure smooth operation. This essential part is designed for use on vehicles with a 1 1/4 inch socket and 7/8 x 14 thread that can be found in many common automotive applications such as differential covers, yokes, and axle shafts. The 8.5-inch 10-bolt also shares the same pinion shaft diameter as the more expensive 12-bolt. You can rest assured knowing that your axle is secured with this high quality product. This is also likely to reduce run times due to lower temperatures as theres less load being put on your vehicles engine when compared to running with a bigger pinion and smaller spur gear combination. To reach an accurate level of tension or preload, experience and expertise are usually required when dealing with this type of repair work. How involved is the process of changing it? Lifted78Chevy. While backlash is a necessary component of manufacturing tolerances, it can be a significant source of problems for certain applications. 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. Backlash refers to the distance between two mating gear teeth when they are not engaged. An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut. 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 . This gives us confidence in the quality of the parts we sell. increments until rotating torque is achieved. The oval-shaped cover measures 8 5/16 inches by 10 9/16 inches. tighten the nut down till its snug and put on your torque wrench and turn it about 3 revolutions. How to eliminate unwanted to holes in your car's body, trunk, floor, or firewall with easy to use patch plugs from Speedway Motors. 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 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. I have a 1993 Suburban K1500. Find the application and ratio you need? Ring Gear Bolt Torque (Foot lbs) (N.m.) Bearing Cap Torque (Foot lbs) (N.m.) AMC; Model 15 : 20 - 40 (2.3 - 4.5 ) . 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. 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. 3. remove yoke from splines. OEM bolts have thread locker on the threads. The following are recommended Differential Set-Up Specifications for various differentials. . This should result in approximately 7 thousandths of an inch adjustment in terms of backlash. Ring gear bolts 65 foot pounds, bearing cap bolts 60 foot pounds. If a bearing system is designed to have no clearance, then preloading is necessary. 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. The distance between thebottom center bolt in the cover and its adjacent bolts is 3 1/4 inches. A 2.6-3.0 gear ratio range is perfect for flat places and most people find this ratio suitable for their needs. Ring Gear Backlash Ring Gear Bolts to Cast FT. LBS. 2008 Sprinter 2500 170 - camper van. Recently a friend enlisted me to help rebuild his 7.5 GM 10 bolt. This allows you to put the pinion gear in, set the pinion bearing pre-load, set the backlash and then run a contact pattern without the chance of compressing the crush sleeve too much. 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 diameter is 1.438 inches, and has 25 splines. This is done in order to decrease pre-load on the bearings; adding more shims will have an overall effect of decreasing it. I need the torque on the pinion nut for the rear differential. By reducing the amount of free play between components, preloaded bearings can provide greater accuracy and quieter operation than standard ball bearings with clearances. 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. 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). You have to do it a little differently though. http://www.gmfullsize.com/forum/showthread.php?t=41717&highlight=pinion+seal. Furthermore, this process helps improve performance by increasing load capacity due to preventing misalignment caused by environmental factors such as vibration or thermal expansion of parts over time; additionally it also allows for smoother operation with less noise generation compared to regular ball bearings with their built-in clearances leading ultimately to higher durability rates since theres less overall wear and tear on individual components throughout long term use. This one is not as easy as it sounds. West Coast Differentials has been distributing quality differential and axle parts since 1982. 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. Give us a try, we think you'll be glad you did! The rear end is full of it. 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. How do you fix a loose pinion bearing preload? We think top-notch customer service is the most important thing we do. The 8.5 rearend will have a round cover, and part of the cover will extend rearward to make room for the ring gear. Unfortunately, you cannot rely on this torque because the crush sleeve provides unpredictable and non-linear resistance as it buckles and crushes. Ring Gear Diameter: 8.500Cover Bolts: 10Ring Gear Bolts: 10Ax . Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. If youre building a street car and want to improve performance, we all know the drill. 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. Date and location of manufacture are stamped in the axle tube, and this table deciphers the code. Axle Images: Axle Details. If you are installing an axle and need to know the torque specs, it is important to first understand what torque is. When installing a new 8.5-inch 10-bolt rear differential, it is important to use the right pinion nut for your application. 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.