pinion nut torque specs gm 10 bolt

This distance must be precise; if it is too small, the gears will bind together and cause mechanical stress which can lead to premature wear or failure. . This is zero backlash. If you installed a new seal, add 1 or 2 in-oz. Jul 2, 2020 / The concept of low-end torque is an important one for drivers to understand when it comes to the performance of a vehicle. 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. 9 Minutes Read / 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. with an impact. 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. You keep on tightening the pinion nut until you are within the in-lb. Gear Ratio Finder - Find the ideal axle gear ratio for your new larger or smaller tires. Pinion nut torque spec. | S-10 Forum VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. PDF TORQUE-TENSION REFERENCE GUIDE - Fastenal When it comes to Chevrolet rearends, its the 12-bolt that seems to get all the accolades. 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. That way, you dont unknowingly spend money on something you really do not want. Whats The Reason Enthusiasts Cant Get, Yes I Am A Dinosaur, And Why I Feel Electric Cars, Rare Rides: The 1969 Chevrolet Camaro COPO, SPEC Clutches: For That Next Engine Swap Or OEM Upgrade, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop Shop, Moroso Anti-Roll Kit Is The Right Tool For The Dragstrip, Why You Need A Proper Fuel Tank Vent In Your Ride, Fenix Is A Next-Gen 69 Camaro With 1,180 Horsepower. Axle Retainer Plate Nuts: 3/8" Grade 8 - 45 ft lbs. GM 8.5 10 bolt - 10 bolt cover with 8.5 ring gear. Like all Chevy 10-bolts, the axles are retained by C-clips on the inner end of the axle shaft inside the carrier. With its strong construction and corrosion resistant coating, the PYN10 provides reliable performance for years to come, making it one of the best choices you can make when securing your vehicle's rear axle assembly. This will help ensure that there isn't an excess of tension on these components, which can lead to premature wear or even failure. I got the price for the seal, and it is near $9. in order to compensate for the drag of the new seal, the nut should be tightened more until the rotational torque of the pinion slightly exceeds what was recorded earlier, but not by more that 5 in/lbs. 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. 1/2" x all lengths 100-110 ft lb. Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. Upgrade your cam, intake, headers, stall converter, and the list goes on from there. Final torque on the pinion nut is necessary to compress the crush sleeve. These are two pinion gears for the 8.5-inch 10-bolt. 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 . How tight should a pinion nut be? 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! I need the torque on the pinion nut for the rear differential. The 8.5-inch 10-bolt also shares the same pinion shaft diameter as the more expensive 12-bolt. 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. Most 8.5-inch 10-bolt rearends have two extruded, cast-in lugs on the bottom of the differential housing at the 5:00 and 7:00 positions. 10.50 PINION NUT: GM . 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. 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. PDF Rear Axle Torque Specs Chevy Silverado - annualreport.psg.fr A forum community dedicated to GMC and Chevy full size owners and enthusiasts. 8.5 10 bolt pinion preload, UPDATE on build - Team Camaro Tech 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. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles. 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. Give us a try, we think you'll be glad you did! Axle Type Cover Bolts FT. LBS. Are all GM 10 bolts the same? 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 number of teeth on each of these gears determines how much rotational force is converted into torque or speed. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. Vendor Part Number. Tips For Rebuilding A GM 8.5" 10-Bolt Rear Differential Step 1: To seat, torque nut to 50 (lb-ft) while . I like to slowly tighten the new pinion nut until I take up all of the front to back free play. This is all with the old crush sleeve. 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 pinion diameter is 1.438 inches, and has 25 splines. Axle Order Form; Floater Axle Order Form; Custom Driveshaft Order Form; . Dana Technical Service Specs. 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. BillaVista.com-14-Bolt Bible Tech Article by BillaVista Follow along as we show how to measure and install a C10 one piece driveshaft. Usually, when people are discussing gear ratios, theyre referring to the relationship between a pinion gear and a spur gear. Max Ellery's Land Cruiser Repair Manual 1969-1990 (FJ & RJ) 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. The X and F-body spring perches come in two versions: mono-leaf (left) which is shallower than the multi-leaf (right). 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. 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. 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. By Albert. In either case, it is important that this critical adjustment be performed correctly in order to avoid costly repairs or replacements down the line. havent done it, but i have the haynes repair manual and ill type out the steps for you, may take me a second though. Next remove the nut and change the seal. Most 8.2 factory covers also have the strangeprotrusionat the top. on new bearings, or 1.2 Nm (10 inch lbs.) Unfortunately, you cannot rely on this torque because the crush sleeve provides unpredictable and non-linear resistance as it buckles and crushes. .006" to .010" 120 ft-lbs. There were an untold number of 8.2-inch axle assemblies built, and although it is only marginally stronger than the 7.5-inch rearend, it does have some aftermarket support. Differential cap bolt torque: 90 ft*lb. 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. when assembling the pinion into place, include the crush sleeve between the two pinion bearings. 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. 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. 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. 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. The oval-shaped cover measures 8 5/16 inches by 10 9/16 inches. Alternate Description. Sometimes when repairing or replacing components within a transmission, you may encounter a crush sleeve. Axle Images: Axle Details. GM 14 Bolt Specs (all data for SRW truck 14 Bolt axle - others may vary - see table on "different 14 bolts" below) . 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 TORQUE FOOR LBS. 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. Next we disassembled everything, starting with the cross pin bolt, cross pin and C clips. Set the preload carefully (see "Set Up Specifications") so that the bearings will have a long life. 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. This method works every time is done precisely as described. Preloading a bearing eliminates the clearance, which increases stiffness and reduces friction. This one is not as easy as it sounds. To begin, the yoke or coupler must be attached to the pinion shaft. Ford 9 inch Torque Specs - Strange Engineering 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. After that we removed the old bearings and cleaned all the parts up in the solvent tank. lbs. 3. remove yoke from splines. Gear Ratio Calculator - Calculate the gear ratio of gears based on their tooth count. Use the blue medium strength on the retaining bolt and the red on the others. Since listing them all within this article is impossible, well be focusing only on visual identification. 2 ways. 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. Typically, 10-bolt differentials are specific to a series of gears. Before disassembly, we marked the bearing caps and kept the side bearing shims on the correct side. The trick is to get it tight as possible without crushing the sleeve any more then it already is crushed. It is therefore important to strike a balance by carefully adjusting the backlash so that it meets manufacturer requirements for that particular differential system. 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. 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. Mgrotel, nice cliff notes. Race-spec ring and pinion gears for desert racing, rock bouncing, and rock . 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. Rebuilding the GM 10-Bolt Rear Axle - MotorTrend 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. History and Identification of Chevy 10 and 12 Bolt Chevy Differentials Fords small block and big block engine families have their share of flexplate differences. Find the torque thats on it before hand and tighten it down to that afterwards. Originally, gear ratios ranged from 2.41 through 4.10. 8 to 11 in-lbs. The easiest way to tell the difference is by looking at the brakes. 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. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! When a very slight increase in pinion turning effort is noted, check the pinion rotating torque using an inch-pound torque wrench. 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. Both axles use a third member that contains the differential, which is made up of the . The 8.5-inch 10-bolt rearend was used in cars and trucks over a wide range of years. FSM says 181-325 ft-lbs. 1989 GMC Suburban SLE 2500 4WD 5.7L Granny 4-speed. When combined with a low curb weight, this combination creates acceleration so fast it feels almost supernatural. 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. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. 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. 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. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. If it takes a 1/2-inch wrench to remove it, its an 8.2. 2429 Mercantile Drive Suite A Mine was a pita. That does not describe how tight the pinion nut needs to be however. Additionally, vehicles with higher torque have better control over their handling due to stronger low-end acceleration which makes them safer on roads and highways. How do you fix a loose pinion bearing preload? 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. The carrier bearing rides in the races and you will snap the bolt off before you warp or crack the races. Dana 60. There are a few that have geared axles on here so they should chime in and help out with Real TECH :rocking: 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. 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. We look forward to serving you! The torque required to seat the nut is very large, possible 200 ft-lbs or more. 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. . The distance between the lower center bolt on the cover and either adjacent bolt is 3 3/4 inches. 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. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. 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. 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. An 8.2 (shown) will have the same contour as the cover. Here are the thin shims from the Summit crush sleeve eliminator. 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. What is the torque specs on pinion nut? 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. Crankshaft Main Bearing Cap Bolts 70. Doing a gear ratio change but not sure what you want? 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. Looking for a driveshaft for your 67-72 C10? grade 8. torque specs 8.5 rear | NastyZ28.com We have your differential parts in stock ready to ship today. Introduction. 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. 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. The PYN10 pinion nut has been specifically designed to fit 30 spline pinions and provide a secure fit and lasting performance. By reducing the amount of free play between components, preloaded bearings can provide greater accuracy and quieter operation than standard ball bearings with clearances. 9 Minutes Read / It was in the 30-35 I "think" from GM. 7.25 12-14: 6-7: 6-10: 55: 50: 8 IFS: 12-15: 6-8: 6-10: 55: 60: 8.25 12-15: 6-8: 6-10: 55: 60: 8.75 - 41 Case: 13-15: 6-8: 6-10: 55: 90: 8.75 - 42 Case: 15-25: 7 . 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. 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. 1. remove d shaft straps push shaft aside. Determining the correct flexplate for your V8 Mopar-powered project takes a little understanding of how these engines were balanced. It first appeared in 1970 production cars as a corporate replacement for the 8.2-inch 10-bolt rearend. 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. I am also replacing all the bearings on my son's 97 Chevy rear end. 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. Ring gear bolts. sny 00235 converted The side bearing preload is the difference of preloads (5) x the gear ratio (3.73) = 18.65. 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. Talk to the experts. The 12-bolt is generally considered to be the stronger of the two rear axles. Either way, the nut should be tightened to produce 24-32-in-lb of torque to turn the pinion . . Failure to apply enough preload on the bearings can have an adverse affect on gear contact patterns. I used an 18" breaker bar with a 2 foot pipe on the end of it in order . Axle Retainer Plate Nuts: 3/8" T-bolts - 30 ft lbs.