GM 8.6" differentials can be installed in a GM 8.5" axle with the proper conversion bearings. 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. Since listing them all within this article is impossible, well be focusing only on visual identification. See all 36 photos. The trick is to get it tight as possible without crushing the sleeve any more then it already is crushed. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. This is zero backlash. 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. . GM 8.6" gears will fit GM 8.5" axles and as such have become the universal aftermarket size for both. 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 the street/strip car, the 10-bolt rearend is a great choice. However, the gears will not interchange with a Chevy 8.2. 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 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. This results in improved performance, longer life span and more efficient operation of the system. Pinion nut has no torque spec. 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. 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. Record pinion flange rotating torque, with a torque wrench. This is all with the old crush sleeve. I don't use it on the bearing cap bolts. Follow along as Zach works over the old 10 bolt and brings it back to life. Peter - I'm retired but work part time as a pain in the ass. Is that really all it takes? A Series 2 carrierwill work with 2.56 and higher gears (numerically lower) such as 2.41. Our custom-length driveshaft kits make it a breeze to get the perfect 67-72 C10 driveshaft length. Zone 1.5 BL, 22x12s, California delete, Detroit TrueTrac, etc. Allstar Pinion Nut GM 7.5 8.5 ALL72156. You keep on tightening the pinion nut until you are within the in-lb. 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. You have to do it a little differently though. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. That does not describe how tight the pinion nut needs to be however. Find the application and ratio you need? Crankshaft Pulley to Hub Bolts 37. The "feel" people are way more experienced that you or I so the top one is re-commended. Order before 4PM and most parts ship out the SAME DAY. I have seen street 12 bolts that . BOP stands for Buick/Oldsmobile/Pontiac. 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. 2429 Mercantile Drive Suite A, Rancho Cordova, CA 95742, Copyright 2023 West Coast Differentials | Website Design by. From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. lbs. The retaining bolt can be hard enough to get out without using the red high strength Lock Tight on it. . The reason why it's so hard to turn the pinion nut is because not only are you crushing the crush collar but you're also pressing the outer pinion bearing onto the pinion gear. Before disassembly, we marked the bearing caps and kept the side bearing shims on the correct side. 10.50 PINION NUT: GM . 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. 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. You will need to know that there are different series of differentials (seriestwo and three). I will attempt to cover the necessary steps in building a differential for a GM 10 bolt rear end with an 8.5/8.6 ring gear. . GM 8.875" 12 Bolt Differential Ring Gear and Pinion Set. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. Backlash = 6-10 (.001 inch) 2003 S-10 ZQ8 - 262/M5:bowtie: 1986 Pontiac Trans Am - 355/A4 DIFF MODEL. One intimidating part for a lot of guys is the rear end. Too much won't hurt anything other than break the bolt. 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. Another way to tell the difference between an 8.2 and an 8.5 rearend is to pull the cover and look at the bolt holding the spider gear crosspin. Pinion preload (used bearings): 8 - 10 in*lb. If your mom is lunch, then yes, I've eaten lunch twice today. Just out of curiosity,what are the 8.5 (r 65lbft & c 60lbft ?) 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. Ring and Pinion Ratio Variations - An explanation of why some ring and pinion gear ratios vary. Pinion Bearing Preload (New) (inch/lbs) Pinion Bearing Preload (Used) (inch/lbs) Backlash (.001 in) Ring Gear Bolt Torque (Foot lbs.) So, when adjusting preload, if it is too loose then the shims should be removed. 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. With the carrier removed w/ new bearings pinion bearing preload should measure a rolling torque of 20-30 in/lbs. Like most 10-bolts, the axles are held in place by C-clips on the inner end of the axles. The small torque . We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. The carrier bearing rides in the races and you will snap the bolt off before you warp or crack the races. You can feel the power of all that torque in your bones as it propels the car forward even faster than before. That being said, limited gear sets are offered for the carriers, especially if you plan to change gear ratios. Date and location of manufacture are stamped in the axle tube, and this table deciphers the code. Again, this would be okay in a daily driver or cruiser application, but if installed behind an engine with horsepower numbers climbing into the 400 range, you can plan on an eventual failure. We look forward to serving you! There is an anomaly to the corporate 8.5-inch axle assembly that was used in some 1971 and 1972 Buick, Oldsmobile, a few 1969 through 1972 Pontiac vehicles, as well as the 1970 through 1972 Monte Carlo. If in doubt, consult our staff of differential parts specialists. 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. Ring gear bolts. Once you give everything a thorough inspection you can begin the re-assembly process. This one is not as easy as it sounds. The pinion nut needs to be torqued to 250 ft/lbs. Some pinion nuts require a special procedure to be properly installed. How involved is the process of changing it? 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. Final torque on the pinion nut is necessary to compress the crush sleeve. Nut secures driveshaft yoke to pinion gear. Both axles use a third member that contains the differential, which is made up of the . sny 00235 converted It's got a 350 with a 10-bolt rear end. 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 was a pita. The rotating torque must be 2 to 3 N-m (15 - 25 inch pounds). Quaility Gears provide guaranteed performance. Pinion Nut (Solid Spacer) 28-Spline Pinion - 200 ft lbs. Search Car Torque Specifications by Engine or Model 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 is not an uncommon sight to see a Yukon Gear Pinion Nut when it comes to automotive repairs. Im gonna go buy a good manual for shit like this. 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 . Inch pound torque wrench that will read that low of a number which will be "VERY" costly. How to eliminate unwanted to holes in your car's body, trunk, floor, or firewall with easy to use patch plugs from Speedway Motors. RING GEAR TORQUE FOOR LBS. 2 ways. It is important to have the right pinion nut for your 8.5-inch 10-bolt rearend. The OEM pinion nut is 1 1/4 inches. The pinion diameter is 1.438 inches, and has 25 splines. Yukon Gear & Axle SK CSGM8.5 Yukon Gear & Axle Crush Sleeve Eliminator Kits | Summit Racing. This will ensure that your backlash is correct without having to swap the shims. EDLANTA there is a "crush" spacer between the two pinion bearings that when tightened properly gives you the proper bearing preload. Is a GM 10 bolt rear end good? 8 to 11 in-lbs. CHECK FREQUENTLY as you progressivley tighten the pinion nut. If the backlash is too tight, you'll need adjust the carrier shim by moving it away from the pinion. The 8.5-inch 10-bolt rearend is hugely popular because aftermarket carriers and gears are easily interchangeable. First I measured the old crush sleeve as a starting point. The pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use. We started by getting a rebuilt kit from Motive Gear . Talk to the experts. Try our Differential Gear Calculator. 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If you're just starting out your adventure with single speed or fixed gear bikes then it's best to opt for ratios around 2.7-2.8 as they are easier on your legs and can help build up strength gradually as you continue cycling further and faster each time. 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.) Automotive Chassis Torque Specs. 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. For inquiries about our products and services, please fill out the form below. 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. The Fora platform includes forum software by XenForo. Sometimes, pinion bearing preload can be a tricky procedure. 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. ALL72156. 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. . 2008 Sprinter 2500 170 - camper van. You can use this instead of the crush sleeve. So, in order to adjust the pinion bearing pre-load, shims of varying thicknesses are inserted into pre-load retainers. On top of that, many pickup owners find that making such modifications also provides them with a greater sense of control over their vehicles capabilities, allowing them to feel more confident and secure on their journey no matter what lies ahead on Oct 5 2022. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? Tighten bolt to 20 ft/lbs. This heavy duty nut has been designed using high grade steel and features a zinc plated finish for maximum protection against rust and corrosion. Step 1: To seat, torque nut to 50 (lb-ft) while spinning hub. It is internally different from the 8.2 Chevy, but has the same external bosses and brackets.
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