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. 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. 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. 2023 Power Automedia. Finding a 12-bolt that is affordable, is getting to be anearly impossible endeavor. As well as many other third member torque specs from Strange. for new bearings. 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. Is a GM 10 bolt rear end good? The concept of low-end torque is an important one for drivers to understand when it comes to the performance of a vehicle. GM 8.5 10 bolt - 10 bolt cover with 8.5 ring gear. At West Coast Differentials we are committed to making your experience with us totally enjoyable. Dana 60. Replace original worn or damaged nuts each time a gear set is changed. 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. Drive Train Specialists Setup Specifications | DriveTrainSpecialists.com Zach got enlisted by a friend to help rebuild the 7.5" factory 10 Bolt rear in the G-Body Monte that he is working on, so naturally it became a teaching moment. Record pinion flange rotating torque, with a torque wrench. 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. Too much won't hurt anything other than break the bolt. Gear oil is nasty stuff, mostly in smell. We were lucky and had a desirable contact pattern on both the drive and coast sides of the gear teeth. Here's a link to when I did mine. 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 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. That being said, limited gear sets are offered for the carriers, especially if you plan to change gear ratios. 1. remove d shaft straps push shaft aside. If sticky tires are used, youll quickly turn the 7.5-inch rear into a pile of unusable parts. range. 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. . Upgrade your cam, intake, headers, stall converter, and the list goes on from there. This article is a compilation of information and and specs relating to the venerable GM Corporate 14 Bolt full-floating rear axle - also referred to as the 10.5" (after the size of the ring gear in inches) or just simply the "14b" for short. I used an 1/4" inch-lb torque wrench with two adapters and a 1 1/16" socket to check the preload. Its strength and reliability have been proven time again, making it an excellent option for drivers looking for reliable performance from their vehicle. I like to measure the old crush sleeve and machine down a solid pinion spacer to that dimension and then . 14 bolts and 10 bolts are different, not sure about changing seals though. Axle Retainer Plate Nuts: 3/8" T-bolts - 30 ft lbs. It is essential to ensure that the pinion flange is firmly held in place with a fixture or tool. The more torque produced, the less energy needed to move the car forward. This is zero backlash. The number of teeth on each of these gears determines how much rotational force is converted into torque or speed. For 30 spline pinion axles, PYN10 offers a 10-bolt 8.5" pinion nut that is designed to provide secure and reliable performance in the toughest of conditions. This procedure is necessary in order to ensure that everything within the drivetrain is working correctly and efficiently. Determining the correct flexplate for your V8 Mopar-powered project takes a little understanding of how these engines were balanced. Like the 8.2-inch 10-bolt, the 8.5 10-bolts use C-clips to retain the axles. 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. GM 14 Bolt Specs (all data for SRW truck 14 Bolt axle - others may vary - see table on "different 14 bolts" below) . Ring Gear Diameter: 8.500Cover Bolts: 10Ring Gear Bolts: 10Ax . How Much Hp Can Stock 5.3 Injectors Handle, What Kind Of Gas Does A Jeep Cherokee Take, Popping Noise When Accelerating And Braking. Therefore when dealing with these types of sleeves it's important to make sure they are installed correctly so as not to compromise its integrity or longevity. 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. Nut secures driveshaft yoke to pinion gear. IMPORTANT: The pinion preload should be at or below 4 Nm (35 inch lbs.) If youre looking for a good.economical 10-bolt rearend to rebuild or install into your hot rod, you will need to be able to accurately identify thedifferent units so you dont accidentally come home with a 7.5 or 8.2-inch differential. Free Shipping - Yukon Gear & Axle Crush Sleeve Eliminator Kits with qualifying orders of $99. The unique design and shape make installation easier while providing ample strength for off-road applications. 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. This is especially true when it comes to cycling. Crankshaft Main Bearing Cap Bolts 70. 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. 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. Step 1: To seat, torque nut to 50 (lb-ft) while . 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. When a very slight increase in pinion turning effort is noted, check the pinion rotating torque using an inch-pound torque wrench. 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 . Rightfully so, because when comparing the 10 and 12-bolt units, its definitely the more durable of the two. Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. Tighten bolt to 20 ft/lbs. Mine was a pita. Here are the thin shims from the Summit crush sleeve eliminator. It has to be drained to get a peak inside. I've put a rachet strap to the axle, hit it with a hammer prayed from the inside but it won't budge enough for the c clip to clear the spider gear. The following are recommended Differential Set-Up Specifications for various differentials. 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. 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. 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 distance between the lower center bolt on the cover and either adjacent bolt is 3 3/4 inches. SPEC Clutches: For That Next Engine Swap Or OEM, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop, Moroso Anti-Roll Kit Is The Right Tool For The, Steer Your Classic Ride Straight With A New CPP Steering, NEW LS Bellhousing For Magnum And T56-Shifted Hot, Fenix Is A Next-Gen 69 Camaro With 1,180, A Brothers Quarrel Results In This Fine 1955 Chevy, Is This Barn Find The Worlds First Corvette? Unfortunately, once this tension has been released the crush sleeve cannot hold it again. Chevrolet GM 8.875 Inch 12 Bolt Truck Ring and Pinion Sets But, did you know there is more than one style of 10-bolt rearend? However, the gears will not interchange with a Chevy 8.2. Setup Specifications. By following these steps carefully and precisely, you can ensure that your gear and carrier are set up correctly for optimal performance. If you're looking to get the most out of your pickup truck, you may want to consider changing the gear ratios. When installing a new 8.5-inch 10-bolt rear differential, it is important to use the right pinion nut for your application. The pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use. Talk to the experts. 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. GM 10-bolt 8.5-inch Differentials | Hemmings #5. The rotating torque must be 2 to 3 N-m (15 - 25 inch pounds). With this pinion nut, you can rest assured that your vehicle will be ready for whatever terrain comes its way! 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. need rear diff torque specs - Diesel Place Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.). That being said, it isnot recommended for use behind engines that make a serious amount ofhorsepower. It is robust enough to withstand any punishment inflicted on it by racetrack use. sny 00235 converted . Additionally, it increases load capacity because it prevents misalignment due to vibration or thermal expansion of components. Once you have obtained your desired setting, it is important to apply preload while rotating the pinion in order to ensure proper engagement with its mating components. 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. When it comes to Chevrolet rearends, its the 12-bolt that seems to get all the accolades. (note make sure the pinion bearing is well oiled when doing this procedure.) 1/2" x all lengths 100-110 ft lb. What happens if you have too much backlash in differential. 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. Axle Order Form; Floater Axle Order Form; Custom Driveshaft Order Form; . Find out how to access AutoZone's Torque Specifications Repair Guide for 300, 300C & Magnum 2006-2008, Charger 2006-2008. When riding a bicycle, the hardest gear available is sometimes necessary for tackling steep climbs and flats alike. Differential Set-Up Specifications | West Coast Differentials Gm 10 Bolt Differential Torque Specs | caredcar.com Torque Specs Dana 60 | Off Road Vehicles 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. Ring and Pinion Gear Set Up Specs - Torque and Backlash - Crawlpedia One intimidating part for a lot of guys is the rear end. This technology is particularly advantageous in improving vehicle handling and traction under all types of driving conditions, from wet roadways to tight turns. 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. . Mgrotel, nice cliff notes. The torque it takes to crush . It also has an inner diameter of 1 . 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. 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. I have been taking it to ~250-300 ft lbs. big gear head. 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. Yukon Gear's Pinion Nut makes any job more efficient by ensuring your parts remain secure while providing superior protection from contaminants. 3/8" T-bolt - 30 ft lbs. Rear end pre load torque | Chevy and GMC Duramax Diesel Forum 1/2" T-bolts - 50 ft lbs. 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. 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! Dana Technical Service Specs. When I changed all the bearings in my suburban rear end, I bought the crush sleeve eliminator shims from Summit. GM 8.6" gears will fit GM 8.5" axles and as such have become the universal aftermarket size for both. 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. Crankshaft Pulley to Crankshaft bolt 77. Many mechanics use an impact gun while others insist the nut should be torqued by hand. Speedway Motors employees enjoy not only helping our customers, but also turning some wrenches in their downtime as well. Bearing Cap Torque (Foot Lbs.) Find the torque thats on it before hand and tighten it down to that afterwards. 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 bearings that are already in use, set preload at 15 inch-pounds; if they are new bearings then you should aim for 25 inch-pounds when setting preload. The pinion diameter is 1.438 inches, and has 25 splines. If rotating torque is low, tighten pinion nut in 6.8 Nm (5 ft. Or some do it by feel. Im gonna go buy a good manual for shit like this. 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.) on old bearings. PINION PRELOAD NEW INCH LBS. 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. However, when you have new gears, a new posi unit, and other variables like mixing housings with differentials you might have to try multiple shims to get a good pattern. with an impact. Are all GM 10 bolts the same? ALL72156. Lifted78Chevy. 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. MOPAR: 8.75" x 1.75" pinion: .090. . 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. 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. torque specs 8.5 rear | NastyZ28.com 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 . 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. The pinion nut should then be secured and tightened until there is no bearing play at all. For reference use at own risk. Ultimately, both engine power and torque play important roles in determining a cars performance capability as well as its overall efficiency. GM 10.5" 14 Bolt: 20 to 35 in-lbs. 8-11 in/lbs for broken in bearings is acceptable. It is internally different from the 8.2 Chevy, but has the same external bosses and brackets. 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. Sometimes it feels like youre in a race car when you accelerate hard with a high-torque vehicle. 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. If youre building a street car and want to improve performance, we all know the drill. 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. Yukon Gear & Axle SK CSGM8.5 Yukon Gear & Axle Crush Sleeve Eliminator Kits | Summit Racing. The 8-inch rear axle looks very much like the popular Ford 9-inch rear axle. 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. For that reason,many enthusiasts are considering the 10-bolt. CAP TORQUE. For the street/strip car, the 10-bolt rearend is a great choice. The retaining bolt can be hard enough to get out without using the red high strength Lock Tight on it. It is important to follow the instructions that came with your differential cover, as torque specifications can vary drastically depending on the material and grade of fastener used as well as the material of the diff cover itself. Use Loctite #271 on the bolt threads and torque in a crisscross fashion to 55 ft-lb. First introduced in 1970 as a corporate replacement for the older 8.2-inch 10-bolt or 12-bolt 8.875-inch axles, its popularity quickly spread to nearly every GM division aside from Cadillac throughout the 70s. 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. 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. 10.50 PINION NUT: GM . minimum is 181 ft-lbs., maximum 325 ft-lbs., keep cranking till you get within the range of 7.8-11.3 in-lbs of preload torque on the pinion. Pinion Lock Bolt Torque Specs - YouTube I used an 18" breaker bar with a 2 foot pipe on the end of it in order . It has a black oxide finish that ensures corrosion resistance while its construction of hardened steel ensures durability even under extreme conditions. 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.
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