We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. When combined with a low curb weight, this combination creates acceleration so fast it feels almost supernatural. The 8-inch rear axle looks very much like the popular Ford 9-inch rear axle. Nut secures driveshaft yoke to pinion gear. I thought the pinion nut would be more like 50-75 FOOT pounds? This will cause the bearings to press more firmly against the races, thereby increasing preload tension. If youre building a street car and want to improve performance, we all know the drill. 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. When in doubt, refer back to step #6 for more information about suggested torque specs for your particular axle installation project. Axle Retainer Plate Nuts: 3/8" T-bolts - 30 ft lbs. If too tight, the bearings become overstressed and will fail prematurely, causing a catastrophic failure of both the ring and pinion gears. 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. GM 8.5" 10 Bolt / Ring & Pinion Gear Set w/ Master Bearing . Data is accurate to the best of our knowledge and is offered as-is with no guarantee. EDLANTA there is a "crush" spacer between the two pinion bearings that when tightened properly gives you the proper bearing preload. 1989 Toyota Pickup/3vze/R150F/Dual RF1A's/8.0 Detroit/8.0 Detroit/5" SAS/38 TSL'S. 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. Lifted78Chevy. 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. All of the parts we sell are also used every day in our busy service shop. Step 2: Back off, then torque to 35 (lb-ft) for automatic hubs,or 50 (lb-ft) for manual hubs. Not only does a torque vectoring differential perform the same basic tasks as a regular differential, but it also has an extra element that sets it apart: its ability to transfer torque between the left and right wheels independently. The pinion nut is a 32mm or 1 1/4" so you need a socket and adapters for that. 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. The torque it takes to crush . 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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. 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. So, when adjusting preload, if it is too loose then the shims should be removed. PINION PRELOAD NEW INCH LBS. This assembly featured an 8.2-inch ring gear diameter as well as 28-spline axles which provided adequate strength for these vehicles. 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. :yipi: Thats it?? Although the 7.5-inch 10-bolt closely resembles the 8.5-inch housing, you can positively identify the Chevy7.5-inchrearend by measuring it. Tightening Torque Clamp Load The correct way to do this is to use the yoke lock (part of the setup tool kit we bought) and use a breaker bar with a cheater pipe. Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. A 2.6-3.0 gear ratio range is perfect for flat places and most people find this ratio suitable for their needs. Additionally, it increases load capacity because it prevents misalignment due to vibration or thermal expansion of components. We believe that our exceptional customer service and product knowledge is what sets us apart from the competition. Not only was the 10-bolt assembly used in low performance applications, but it was also utilized in a variety of different vehicles ranging from Camaros, Chevelles and Impalas to even the earlier Chevy IIs. Have a seal puller if possible, makes getting the old one out a lot easier. I don't use it on the bearing cap bolts. Check the pinion preload by rotating the pinion with a torque wrench. The control arm-mounting ears on top of this 7.5 rearend denotes it is usable for any 1978-88 GM A or G-body intermediate like a Cutlass, Monte Carlo, El Camino, Malibu, Regal, or Grand Prix. CAP 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. 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. DANA SPICER: .035. Most 8.2 factory covers also have the strangeprotrusionat the top. The large flanges are easy to grip and make installation or removal easier than ever before, allowing you to easily tighten or loosen the nut without fear of it slipping away. 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. Reply Quote. It is not an uncommon sight to see a Yukon Gear Pinion Nut when it comes to automotive repairs. 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. Pinion bearing preload is measured in inch-pounds, and is a measure of the rolling resistance of the pinion bearings after proper torque has been applied to the pinion nut. 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. Crankshaft Main Bearing Cap Bolts 70. GM 10.5" 14 Bolt: 20 to 35 in-lbs. We talked to a few of our in-house race experts about ways to make this racing season your best one yet! The covers on the 8.5-inch rearends are often 11 inches round with a bulge on the drivers side to accommodate the ring gear. 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. 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. 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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. If the nut is loose then the crush sleeve must be changed. 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. It was in the 30-35 I "think" from GM. Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. Some pinion nuts require a special procedure to be properly installed. Automotive Chassis Torque Specs. ALL72156. . BOP stands for Buick/Oldsmobile/Pontiac. Failure to apply enough preload on the bearings can have an adverse affect on gear contact patterns. 2 ways. You keep on tightening the pinion nut until you are within the in-lb. with an impact. It's got a 350 with a 10-bolt rear end. 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. If your mom is lunch, then yes, I've eaten lunch twice today. Ring Gear Bolt Torque (Foot lbs) (N.m.) Bearing Cap Torque (Foot lbs) (N.m.) AMC; Model 15 : 20 - 40 (2.3 - 4.5 ) . If i missed any thing PLEASE tell me. carrier bearings, races, crush sleeve, pinion nut, pinion seal, a gasket and even has the gear marking grease included. You can feel the power of all that torque in your bones as it propels the car forward even faster than before. This technology is particularly advantageous in improving vehicle handling and traction under all types of driving conditions, from wet roadways to tight turns. First mark the position of the nut with a chisel or other method so you can tighten it back to exactly the same place. Rightfully so, because when comparing the 10 and 12-bolt units, its definitely the more durable of the two. Shop Differential Pinion Bearing Spacers and Sleeves at Summit Racing. The rotating torque must be 2 to 3 N-m (15 - 25 inch pounds). 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. Uses 28 or 30 spline c-clip axles. 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. Sie Bear Caps FT. LBS; AMC 20 12 Bolt Rear Axle Torque Specs. Finding a 12-bolt that is affordable, is getting to be anearly impossible endeavor. A forum community dedicated to all General Motors truck owners and enthusiasts. increments until rotating torque is achieved. What is the gear ratio on a 10 bolt rear end? Torque Specs on Dana 60. TORQUE-TENSION REFERENCE GUIDE Printed in U.S.A. Supply Part Number: 9702365 AS 06/14 Torque Poster . 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. How a GM 10-Bolt Differential Goes Bad. 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. Camshaft thrust Plate bolts 106 in-lbs. GM 8.6" differentials can be installed in a GM 8.5" axle with the proper conversion bearings. 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. I have a 1993 Suburban K1500. 4.replace seal. 2023 Power Automedia. Speedway also offers the . Record pinion flange rotating torque, with a torque wrench. The Fora platform includes forum software by XenForo. when assembling the pinion into place, include the crush sleeve between the two pinion bearings. Some builders . Use the blue medium strength on the retaining bolt and the red on the others. While deciding on the ideal gear ratio for your bike, it's important to consider that a lower value will provide more comfortable pedaling, as you'll be able to spin the pedals at a higher cadence. 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. Recently a friend enlisted me to help rebuild his 7.5 GM 10 bolt. The 8.5-inch 10-bolt rearend was used in cars and trucks over a wide range of years. Once properly secured in place, you should have no further issues with your pinion nut installation. Find the application and ratio you need? New bearings 19 to 22 inch pounds. When installing a new 8.5-inch 10-bolt rear differential, it is important to use the right pinion nut for your application. 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. These protrusions are larger than those on the 7.5 rearend. An 8.2 (shown) will have the same contour as the cover. Allstar Pinion Nut GM 7.5 8.5 ALL72156. 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. 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. 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. If it takes a 1/2-inch wrench to remove it, its an 8.2. It's not easy, but pushing yourself can be rewarding; after all, with hard work come great rewards! ALL72156. 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). 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. and 12 bolt #s. found these #s at Richmond Gear: Torque specifications. With the carrier removed w/ new bearings pinion bearing preload should measure a rolling torque of 20-30 in/lbs. Pinion Nut (Solid Spacer) 28-Spline Pinion - 200 ft lbs. FSM says 181-325 ft-lbs. It saved me time and effort trying to crush a brand new crush sleeve. extended cab crew cab p 14 8 6 gm rear axle specifications 10 bolt cont, what are the torque specs on silverado rear diff cover you need rear axle pinion nut torque specs for a 98 chevy 12 ton pickup 2wd the nut is generally torqued to 260 300 ft lbs or 25 inch, proper torque specs for 2002 chevy silverado 1500 44 hub assembly to steering . 2429 Mercantile Drive Suite A, Rancho Cordova, CA 95742, Copyright 2023 West Coast Differentials | Website Design by. While this article focuses specifically on the GM 8.5 10-bolt rear differential, the parts and processes described herein cover most differential housings.Built from the 1970s through today (the 8.6" 10-bolt is still used in most GM . **Note the Pinion nut is in INCH pounds Ring Gear Bolts = 55 lb. Dana 60. 7/16" x all lengths 60-65 ft lb. All 8.6-inchrears have disc brakes, and 8.5-inch units have drum brakes. Some of the most popular GM vehicles have come with 10-bolt rear ends. I need the torque on the pinion nut for the rear differential. Pinion preload (new bearings): 17 - 30 in*lb. You have to do it a little differently though. This is zero backlash. 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. These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. Recheck the torque to turn the pinion until it gets to the point where the amount of torque it takes to turn the pinion is between 15-25 in. to do this. 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. A forum community dedicated to GMC and Chevy full size owners and enthusiasts. 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. The OEM pinion nut is 1 1/4 inches. 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 . 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. Thanks Mike, Id appreciate it. When working on the assembly of a differential, there are two methods for adjusting the pinion depth. This results in improved performance, longer life span and more efficient operation of the system. I like to measure the old crush sleeve and machine down a solid pinion spacer to that dimension and then . 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 tension between the bearings of a crush sleeve is a very important factor in its performance, as it helps to ensure that the bearing stays correctly set and does not move or become misaligned. 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.) I like to slowly tighten the new pinion nut until I take up all of the front to back free play. Ring and Pinion Ratio Variations - An explanation of why some ring and pinion gear ratios vary. Here are the thin shims from the Summit crush sleeve eliminator. 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. (note make sure the pinion bearing is well oiled when doing this procedure.) Unfortunately, you cannot rely on this torque because the crush sleeve provides unpredictable and non-linear resistance as it buckles and crushes. It is internally different from the 8.2 Chevy, but has the same external bosses and brackets. On the other hand, if preload is too tight then you'll need to take out the pinion gear and add extra shims in order to reduce bearing pressure against the races. We pressed the new bearings onto the carrier and the front pinion bearing and went ahead and put the assembly together into the housing. Oct 20, 2011. 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. Skip to main content. Lighter and more efficient than its Ford 9-inch and Dana 60 rivals, the 12-bolt enjoys as much use amongst brand-loyal off-roaders as it . Mgrotel, nice cliff notes. Axle Order Form; Floater Axle Order Form; Custom Driveshaft Order Form; . By Albert. However, the gears will not interchange with a Chevy 8.2. 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. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! Find the torque thats on it before hand and tighten it down to that afterwards. lbs.) Yukon Gear's Pinion Nut makes any job more efficient by ensuring your parts remain secure while providing superior protection from contaminants. Ultimately, both engine power and torque play important roles in determining a cars performance capability as well as its overall efficiency. For reference use at own risk. Axle Retainer Plate Nuts: 3/8" Grade 8 - 45 ft lbs. CRAWLPEDIA Off-Road Encyclopedia. FORD: .020. The distance between thebottom center bolt in the cover and its adjacent bolts is 3 1/4 inches. This is done in order to decrease pre-load on the bearings; adding more shims will have an overall effect of decreasing it. Tighten bolt to 20 ft/lbs. When a very slight increase in pinion turning effort is noted, check the pinion rotating torque using an inch-pound torque wrench. Currie 60/70 : Torque . Upgrade your cam, intake, headers, stall converter, and the list goes on from there. 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. Axle Type Cover Bolts FT. LBS. 14 bolts and 10 bolts are different, not sure about changing seals though. . Pinion Bearing Preload (New) (inch/lbs) Pinion Bearing Preload (Used) (inch/lbs) Backlash (.001 in) Ring Gear Bolt Torque (Foot lbs.) 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. Call 800.979.0122, 7am-10pm, everyday. West Coast Differentials stocks a complete line of light duty axle parts for Chevrolet, Chrysler, Dana, Ford, GM, Jeep and Toyota and more! 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. Setup Specifications. The only torque you should be concerned with is the torque it takes to rotate the pinion gear alone, 8-14 inch pounds for old bearings, 16-29 in/lbs. Backlash = 6-10 (.001 inch) 2003 S-10 ZQ8 - 262/M5:bowtie: 1986 Pontiac Trans Am - 355/A4 It was used in different models by all GM divisions with the exception of Cadillac. Originally, gear ratios ranged from 2.41 through 4.10. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! Yukon Gear & Axle SK CSGM8.5 Yukon Gear & Axle Crush Sleeve Eliminator Kits | Summit Racing. http://www.gmfullsize.com/forum/showthread.php?t=41717&highlight=pinion+seal. The most current parts and application information can always be found here on our website or by calling one of our differential parts experts. I used an 1/4" inch-lb torque wrench with two adapters and a 1 1/16" socket to check the preload. 8-11 in/lbs for broken in bearings is acceptable. Next we disassembled everything, starting with the cross pin bolt, cross pin and C clips. Max Ellery's Land Cruiser Repair Manual 1969-1990 (FJ & RJ) Loosen the right-side adjusting nut and tighten the left-side adjusting nut until the ring gear contacts the pinion without binding. 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. Race-spec ring and pinion gears for desert racing, rock bouncing, and rock . 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. Learn more about GM steering column identification, GM steering column lengths, and GM steering column compatibility. See all 36 photos. Now that we know our pinion depth shim is correct we can do the final assembly. The 8.5-inch 10-bolt also shares the same pinion shaft diameter as the more expensive 12-bolt. To reach an accurate level of tension or preload, experience and expertise are usually required when dealing with this type of repair work. 5. put back together and tight pinion nut to specified torque. Original gear ratios in pickups can range from 2.41:1 all the way up to 4.10:1, offering a wide variety of options depending on your needs and preferences.