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 Series 3 carriers are good for use with 2.73 and lower gears (numerically higher), so 3.08 and 3.73 gears work well. When changing a ring & pinion and doing final install of pinion there is no torque spec on the pinion nut itself. 1989 Toyota Pickup/3vze/R150F/Dual RF1A's/8.0 Detroit/8.0 Detroit/5" SAS/38 TSL'S. The lower end of this range will give you a cadence of 90 rpm which translates to an average speed of 30 km/h while the upper end will get you going up to 34 km/h. Read More. Unfortunately, once this tension has been released the crush sleeve cannot hold it again. 4.replace seal. Then after getting the proper gear patterns you put the new crush sleeve and seal in place and tighten the pinion nut to force the crush sleeve. Cover Bolts: 25 ft lbs. DANA SPICER: .035. Once the specified preload has been obtained, make sure the bearings are seated by rotating the pinion several times. Once you give everything a thorough inspection you can begin the re-assembly process. The rotational torque spec is between 15-19. 8 to 11 in-lbs. Order our high performance synthetic oil and friction additive combo kit at time of order for ring and pinion or bearing overhaul kit and pay only $49.95 plus S&H, a $54.00 value. Upgrade your cam, intake, headers, stall converter, and the list goes on from there. Date and location of manufacture are stamped in the axle tube, and this table deciphers the code. The engine roars and the tires dig into the pavement as they work to move your car forward, pushing you back into your seat with tremendous force. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. Gear oil is nasty stuff, mostly in smell. West Coast Differentials stocks a complete line of light duty axle parts for Chevrolet, Chrysler, Dana, Ford, GM, Jeep and Toyota and more! If i missed any thing PLEASE tell me. I like to measure the old crush sleeve and machine down a solid pinion spacer to that dimension and then . 2. unbolt pinion nut. GM 10.5" 14 Bolt: 20 to 35 in-lbs. Connecting Rod Cap Nuts 38. 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. Lifted78Chevy. on new bearings, or 1.2 Nm (10 inch lbs.) If in doubt, consult our staff of differential parts specialists. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. When it comes to Chevrolet rearends, its the 12-bolt that seems to get all the accolades. MOPAR: 8.75" x 1.75" pinion: .090. . 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. 10.50 PINION NUT: GM . You can replace the pinion seal without changing the crush sleeve. Speedway Motors employees enjoy not only helping our customers, but also turning some wrenches in their downtime as well. Oct 20, 2011. For that reason,many enthusiasts are considering the 10-bolt. Here is my related question at almost 1 a.m. and torn down in driveway need to get to work: There was quite a chance that you have crushed the sleeve beyond the preload spec to make it hard to turn. This heavy duty nut has been designed using high grade steel and features a zinc plated finish for maximum protection against rust and corrosion. That way, you dont unknowingly spend money on something you really do not want. This sleeve must be replaced every time the pinion nut is torqued. 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. Use Loctite #271 on the bolt threads and torque in a crisscross fashion to 55 ft-lb. Its strength and reliability have been proven time again, making it an excellent option for drivers looking for reliable performance from their vehicle. By Albert. I have been taking it to ~250-300 ft lbs. lbs. 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. 440-500 lbs ft and I wouldn't tackle it bring it somewhere where they know what they are doing..I have a four foot torque wrench that goes to 500 but thats one hell of a grunt and you have to hold the flange while doing this. It was used in different models by all GM divisions with the exception of Cadillac. When the preload of the pinion bearings is incorrectly adjusted, it can have serious consequences. Is that really all it takes? 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. Unfortunately, unless you have the two units side by side, it is nearly impossible to tell them apart. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. 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. 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. 14 TO 19. 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 . Not only will you be getting the best quality performance with JEGS Pinion Nut, but you'll also have the convenience of knowing it's made to fit GM 8.875 inch 12-bolt car and truck axles. One thing often overlooked is the RTV sealant that needs to be applied to the splines (otherwise rear end grease can leak past the splines), and locktite on the new pinion nut. That is theimpetus for why we decided to put this swap meet/junkyard identification guide together. 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. 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. 8-10 ft lbs: None: None: GM 12 Bolt Car: Torque: Lubricant: Thread Locker: Main Caps: OEM Housing: . Assemblers must decide for themselves how much leeway they are willing to allow in this area and assess whether the potential results would warrant such leniency. The pinion bearing preload is an important component of the drivetrain system, as it works to ensure that the pinion gear's tapered bearings are running smoothly and efficiently. Rancho Cordova, CA 95742, Bearing Preload, Backlash and Torque Specifications. 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. 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. The small torque . Thanks Mike, Id appreciate it. Dana 60. All rights reserved. The amount you tighten the nut (with or without the crush sleeve) is based on the amount of force measured in inch pounds it takes to rotate the pinion. Replace original worn or damaged nuts each time a gear set is changed. 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. JavaScript is disabled. On the other hand, reducing the size of the pinion or increasing the size of spur gear will result in decreased top speed but with an increase in acceleration. May 22, 2021 /
Crawlpedia is an off-road encyclopedia featuring a complete list of proper ring and pinion gear set up torque and backlash specs. http://www.gmfullsize.com/forum/showthread.php?t=41717&highlight=pinion+seal. 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. A Series 2 carrierwill work with 2.56 and higher gears (numerically lower) such as 2.41. How Much Hp Can Stock 5.3 Injectors Handle, What Kind Of Gas Does A Jeep Cherokee Take, Popping Noise When Accelerating And Braking. How a GM 10-Bolt Differential Goes Bad. Reply Quote. With careful consideration, selecting an appropriate option for your driving style can make a world of difference when it comes to performance and efficiency behind the wheel. 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. Well show you what to look for in this buyers guide. 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. 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. We think top-notch customer service is the most important thing we do. 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. Continue tightening the pinion nut to collapse the spacer and preload the bearings. 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. Dana Technical Service Specs. How do you fix a loose pinion bearing preload? 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. This technology is particularly advantageous in improving vehicle handling and traction under all types of driving conditions, from wet roadways to tight turns. 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. 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. 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 . The date and location of manufacture coding changed in 1971. I am also replacing all the bearings on my son's 97 Chevy rear end. Locate a Sierra Gear & Axle Distributor near you. 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. Nut secures driveshaft yoke to pinion gear. This is very important, because if you go too far the crush sleeve will be ruined. 14 bolts and 10 bolts are different, not sure about changing seals though. . GM 8.875" 12 Bolt Differential Ring Gear and Pinion Set. Allstar Pinion Nut GM 7.5 8.5 ALL72156. 7/16" x all lengths 60-65 ft lb. We started by getting a rebuilt kit from Motive Gear . For the street/strip car, the 10-bolt rearend is a great choice. Take Zach R. for instance. This heavy-duty nut is made with high quality materials and manufactured to exacting standards, ensuring it stands up to whatever you throw at it. for new bearings. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! Find out how to access AutoZone's Torque Specifications Repair Guide for 300, 300C & Magnum 2006-2008, Charger 2006-2008. increments until rotating torque is achieved. 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. Try our Differential Gear Calculator. 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. Final torque on the pinion nut is necessary to compress the crush sleeve. Crankshaft Pulley to Hub Bolts 37. 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. You keep on tightening the pinion nut until you are within the in-lb. We look forward to serving you! . 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. While backlash is a necessary component of manufacturing tolerances, it can be a significant source of problems for certain applications. You tighten it until the bearing preload is correct. See other Red Line Oil Products that we recommend. 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. 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. Inch pound torque wrench that will read that low of a number which will be "VERY" costly. To do this, measure 10 thousandths of an inch on the shim and shift it accordingly. There is no way to happiness.happiness is the way. Backlash refers to the distance between two mating gear teeth when they are not engaged. One intimidating part for a lot of guys is the rear end. Sometimes strength is an important factor when choosing between components, and this is true with the 10-bolt and 12-bolt rearends. I don't use it on the bearing cap bolts. Tightening Torque Clamp Load (lbs.) 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. Have a seal puller if possible, makes getting the old one out a lot easier. GM: .035. With the pinion bearing properly lubricated, increase or decrease . Next we disassembled everything, starting with the cross pin bolt, cross pin and C clips. This strength comes from its larger pinion shaft diameter which measures 1.625 inches with 30 splines, 13 percent larger than the 1.438 inch diameter and 25 spline pinion shaft found on a 10-bolt axle. 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. That's all fine and dandy but my pinnion was chewing it's way through the carrier and now I can't get the passenger side c clip to drop out. 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. This axle was found in various vehicles from Chevrolets and Pontiacs to Oldsmobiles and Buicks with some of these models continuing production well into the early 80's. I got the price for the seal, and it is near $9. without any detrimental effects occurring. Low-end torque refers to the amount of power and force generated by an engine at low revolutions per minute (RPMs), usually between 2000 and 3000. Our stock 10-bolt was plenty stout to withstand the torture of 165 hp from the ZedSled's stock 350 (yes, that was sarcasm), but we're looking down the barrel at 500 hp from our cammed-up 6.0 swap . With one nut per package and a 7/8-16 thread size, this pinion nut is made from strong steel and has a sleek black finish for a nice look. Ring and Pinion Ratio Variations - An explanation of why some ring and pinion gear ratios vary. 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. As the speedometer rises, each gear shift is accompanied by an even more intense sensation of power, making every drive exhilarating and unforgettable. #5. I used an 18" breaker bar with a 2 foot pipe on the end of it in order . 1989 GMC Suburban SLE 2500 4WD 5.7L Granny 4-speed. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. 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. Determining the correct flexplate for your V8 Mopar-powered project takes a little understanding of how these engines were balanced. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. By Albert. It has a black oxide finish that ensures corrosion resistance while its construction of hardened steel ensures durability even under extreme conditions. This assembly featured an 8.2-inch ring gear diameter as well as 28-spline axles which provided adequate strength for these vehicles. Back off left-side adjusting nut approximately 2 slots. What is the torque specs on pinion nut? Constructed from high quality steel, the PYN10 features an integral washer design that ensures proper alignment of the bearing preload during installation and prevents damage to both the yoke and bearings. Setup Specifications. Check the pinion preload by rotating the pinion with a torque wrench. 9 Minutes Read /
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. 1988 C1500 Silverado, 5.7L with some go fast parts. JavaScript is disabled. We will safeguard your e-mail and only send content you request. DIFF MODEL. It also has an inner diameter of 1 . The 8.5-inch and 8.6-inch 10-bolt rears are stout and effective differentials that can handle more power than either the 7.5 or 8.2-inch rears. Now that we know our pinion depth shim is correct we can do the final assembly. Tighten bolt to 20 ft/lbs. 3/8" T-bolt - 30 ft lbs. ring gear bolts torque at 175lb/ft, bearing cap bolts torque at 200lb/ft, and the ring gear backlash should be between .006-.010 for aftermarket gears, .005-.007 for OEM gears. Step 3: Back off 3/8-turn for automatic hubs, and just enough to free the bearing for manual hubs. 2.2L FOUR CYLINDER ENGINE: Camshaft sprocket bolt 96. 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. MODEL 20. CRAWLPEDIA Off-Road Encyclopedia. An 8.2 (shown) will have the same contour as the cover. In most cases, however, even with a straight case, a certain degree of backlash can be tolerated up to 0.005? 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. grade 8. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? The Fora platform includes forum software by XenForo. The unique design and shape make installation easier while providing ample strength for off-road applications. 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. Since listing them all within this article is impossible, well be focusing only on visual identification. By following these steps carefully and precisely, you can ensure that your gear and carrier are set up correctly for optimal performance. When riding a bicycle, the hardest gear available is sometimes necessary for tackling steep climbs and flats alike. When I changed all the bearings in my suburban rear end, I bought the crush sleeve eliminator shims from Summit. Most 8.2 factory covers also have the strangeprotrusionat the top. . Follow along as we show how to measure and install a C10 one piece driveshaft. Tightening Torque Clamp Load As a result, this construction became one of the most popular axle assemblies on the market due to its durability and affordability. Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear. This is all with the old crush sleeve. If you installed a new seal, add 1 or 2 in-oz. 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. While the 8.5-inch rearend was used on vehicles up to 1999, The 8.6-inch (8.625) was used on 2000 and later-year trucks. Pinion Bearing Preload (New) (inch/lbs) Pinion Bearing Preload (Used) (inch/lbs) Backlash (.001 in) Ring Gear Bolt Torque (Foot lbs.) The rotating torque must be 2 to 3 N-m (15 - 25 inch pounds). 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. 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. Backlash = 6-10 (.001 inch) 2003 S-10 ZQ8 - 262/M5:bowtie: 1986 Pontiac Trans Am - 355/A4 The side bearing preload is the difference of preloads (5) x the gear ratio (3.73) = 18.65. Mine was a pita. Skip to main content. The 7.5 rearend uses an oval cover and the housing has two small cast-in protrusions near two of the bottom cover bolts. If it takes a 5/16-inch wrench to remove it, its an 8.5. These have been around since 1975, and were installedunder cars, small trucks, and vans up to the 2005 model year. 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. You have to do it a little differently though. I then assembled the pinion, inner bearing, shim pack in the carrier then pressed on the outer bearing using a 20 t press then installed the yoke washer and nut. Record pinion flange rotating torque, with a torque wrench. It is important to have the right pinion nut for your 8.5-inch 10-bolt rearend. Pinion preload (new bearings): 17 - 30 in*lb. 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. Torque Specs on Dana 60. CHECK FREQUENTLY as you progressivley tighten the pinion nut. 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. 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. Use the blue medium strength on the retaining bolt and the red on the others. It is not an uncommon sight to see a Yukon Gear Pinion Nut when it comes to automotive repairs. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 2008 Sprinter 2500 170 - camper van. 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. The number of teeth on each of these gears determines how much rotational force is converted into torque or speed. Would this be the same How to write up for my truck? . 8-11 in/lbs for broken in bearings is acceptable. How involved is the process of changing it? GM 10 Bolt 8.2; GM 10 Bolt 8.5; GM 12 Bolt 8.875; GM 8.6 IRS; GM Install Kits; MOPAR. This tension is achieved through a collapsible spacer which is placed between the bearings and then compressed by turning the pinion gear nut. 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. 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. This difference can cause issues with accuracy and repeatability in some applications, necessitating either higher-end components or additional compensation mechanisms. This website uses cookies or similar technologies to enhance your browsing experience. The torque required to seat the nut is very large, possible 200 ft-lbs or more. We talked to a few of our in-house race experts about ways to make this racing season your best one yet! 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. Used bearings 10 to 14 inch pounds. The pinion nut is a 32mm or 1 1/4" so you need a socket and adapters for that. Uses 28 or 30 spline c-clip axles. Sometimes, you need to push yourself. That being said, limited gear sets are offered for the carriers, especially if you plan to change gear ratios. Some pinion nuts require a special procedure to be properly installed. Ford 9 inch Torque Specs for Ford 9 inch center Section torque specs. Then use lock-tight on the threads and tighten the nut back to where it was. These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. 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. I like to slowly tighten the new pinion nut until I take up all of the front to back free play. The following are recommended Differential Set-Up Specifications for various differentials. big gear head. 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. 2 ways. Install left-side adjusting nut lock, washer, and bolt. 1/2" T-bolts - 50 ft lbs. The amount of backlash varies depending on the quality and cost of the gearhead; more expensive precision gearheads have nearly zero backlash, while an inexpensive model may have as much as one degree or more. 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. Mgrotel, nice cliff notes. . Sometimes it feels like youre in a race car when you accelerate hard with a high-torque vehicle. 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. ft. 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! The more torque produced, the less energy needed to move the car forward. Sometimes when repairing or replacing components within a transmission, you may encounter a crush sleeve. 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. If sticky tires are used, youll quickly turn the 7.5-inch rear into a pile of unusable parts. First I measured the old crush sleeve as a starting point. This should result in approximately 7 thousandths of an inch adjustment in terms of backlash. You can feel the power of all that torque in your bones as it propels the car forward even faster than before. Doing a gear ratio change but not sure what you want? Speedway also offers the . To reach an accurate level of tension or preload, experience and expertise are usually required when dealing with this type of repair work. The distance between thebottom center bolt in the cover and its adjacent bolts is 3 1/4 inches. EDLANTA there is a "crush" spacer between the two pinion bearings that when tightened properly gives you the proper bearing preload. 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.