Typically, 10-bolt differentials are specific to a series of gears. MODEL 20. Looking for a driveshaft for your 67-72 C10? 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 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. The 8.5-inch is often referred to as the "GM corporate 10-bolt" because of its multiple uses, and the 8.5-inch is a semi-float axle, meaning it has only one axle bearing per side, mounted inside the axle tube. These protrusions are larger than those on the 7.5 rearend. 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. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? Replace original worn or damaged nuts each time a gear set is changed. We pressed the new bearings onto the carrier and the front pinion bearing and went ahead and put the assembly together into the housing. For a better experience, please enable JavaScript in your browser before proceeding. How Much Hp Can Stock 5.3 Injectors Handle, What Kind Of Gas Does A Jeep Cherokee Take, Popping Noise When Accelerating And Braking. 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. 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. The following table contains the proper specifications for all popular axles. 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. 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Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear. This website uses cookies or similar technologies to enhance your browsing experience. 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. See all 36 photos. Ford 9 inch torque specs; Gear Ratio Calculator; Order Forms. From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. If rotating torque is low, tighten pinion nut in 6.8 Nm (5 ft. If too tight, the bearings become overstressed and will fail prematurely, causing a catastrophic failure of both the ring and pinion gears. It should be noted that while this axle is suitable for everyday driving and light duty applications, it must be upgraded if you plan on doing any serious racing or off-road activities with your vehicle. 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. checking the pre load with the inch lb torque . 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. What is the gear ratio on a 10 bolt rear end? The pinion nut needs to be torqued to 250 ft/lbs. 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. What size is pinion nut Silverado? Unfortunately, unless you have the two units side by side, it is nearly impossible to tell them apart. This one is not as easy as it sounds. ALL72156. You keep on tightening the pinion nut until you are within the in-lb. Automotive Chassis Torque Specs. 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. It said you want this to be from 5-35. The pinion nut should then be secured and tightened until there is no bearing play at all. Pinion Nut Size: 1-1/4" Featured Products: GM 8.2"/8.5"/8.6" (Chevy) 10 Bolt / Aluminum Girdle Cover / TA Performance / TA_1807 . JavaScript is disabled. It first appeared in 1970 production cars as a corporate replacement for the 8.2-inch 10-bolt rearend. It is robust enough to withstand any punishment inflicted on it by racetrack use. However, the gears will not interchange with a Chevy 8.2. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. 2429 Mercantile Drive Suite A If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. 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 . 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. Sometimes strength is an important factor when choosing between components, and this is true with the 10-bolt and 12-bolt rearends. 5. put back together and tight pinion nut to specified torque. 3/8" x all lengths 45-50 ft lb. OEM bolts have thread locker on the threads. Currie 60/70 : Torque . While backlash is a necessary component of manufacturing tolerances, it can be a significant source of problems for certain applications. Unfortunately, once this tension has been released the crush sleeve cannot hold it again. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. 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. .006" to .010" 120 ft-lbs. 9 Minutes Read / By Albert. . This essential part is designed for use on vehicles with a 1 1/4 inch socket and 7/8 x 14 thread that can be found in many common automotive applications such as differential covers, yokes, and axle shafts. Backlash refers to the distance between two mating gear teeth when they are not engaged. PINION NUT GM 7.5 8.5. Torque measures the amount of force that is generated when the engine rotates at a certain speed. 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. Torque Specs on Dana 60. 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 can rest assured knowing that your axle is secured with this high quality product. 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. Well show you what to look for in this buyers guide. I got the price for the seal, and it is near $9. Pinion Nut (Solid Spacer) 28-Spline Pinion - 200 ft lbs. 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. Used bearings 10 to 14 inch pounds. Finding a 12-bolt that is affordable, is getting to be anearly impossible endeavor. FORD: .020. I like to measure the old crush sleeve and machine down a solid pinion spacer to that dimension and then . 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. GM 8.5 10 bolt - 10 bolt cover with 8.5 ring gear. Differential cap bolt torque: 90 ft*lb. If the nut is loose then the crush sleeve must be changed. 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. Call 800.979.0122, 7am-10pm, everyday. The most current parts and application information can always be found here on our website or by calling one of our differential parts experts. Axle Retainer Plate Nuts: 3/8" T-bolts - 30 ft lbs. Additionally, its unique thread pattern provides torque retention while eliminating any possibility of loosening or vibrating off over time due to vibration or shock loads. 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. By following these steps carefully and precisely, you can ensure that your gear and carrier are set up correctly for optimal performance. When it comes to adjusting the backlash of your vehicle's pinion gear and carrier, there are a few rules of thumb to keep in mind. on new bearings, or 1.2 Nm (10 inch lbs.) I thought the pinion nut would be more like 50-75 FOOT pounds? Axle Retainer Plate Nuts: 3/8" Grade 8 - 45 ft lbs. Sometimes when repairing or replacing components within a transmission, you may encounter a crush sleeve. 1/2" x all lengths 100-110 ft lb. 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. I reused the old crush sleeve and just added a thin shim out of the set to be able to get the pinion preload using the old crush sleeve. For the street/strip car, the 10-bolt rearend is a great choice. Fords small block and big block engine families have their share of flexplate differences. Check the pinion preload by rotating the pinion with a torque wrench. . Differential Locker Comparison - A detailed comparison of popular differentials and lockers. So, in order to adjust the pinion bearing pre-load, shims of varying thicknesses are inserted into pre-load retainers. When riding a bicycle, the hardest gear available is sometimes necessary for tackling steep climbs and flats alike. Max Ellery's Land Cruiser Repair Manual 1969-1990 (FJ & RJ) Generally speaking, these torque specifications will fall between 20-30 ft/lbs; however, for most applications ARB recommends a torque specification of right around 25 ft/lbs. Gear oil is nasty stuff, mostly in smell. Thick Gears and Carrier Breaks - Thick ring and pinion gears and differential carrier breaks explained. without any detrimental effects occurring. Are all GM 10 bolts the same? The pinion diameter is 1.438 inches, and has 25 splines. A forum community dedicated to all General Motors truck owners and enthusiasts. **Note the Pinion nut is in INCH pounds Ring Gear Bolts = 55 lb. For that reason,many enthusiasts are considering the 10-bolt. For reference use at own risk. The distance between thebottom center bolt in the cover and its adjacent bolts is 3 1/4 inches. 6 TO 10. Rightfully so, because when comparing the 10 and 12-bolt units, its definitely the more durable of the two. DANA SPICER: .035. 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 . 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. 2. unbolt pinion nut. Data is accurate to the best of our knowledge and is offered as-is with no guarantee. FSM says 181-325 ft-lbs. The concept of low-end torque is an important one for drivers to understand when it comes to the performance of a vehicle. to do this. 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. The torque it takes to crush . CHECK FREQUENTLY as you progressivley tighten the pinion nut. Or some do it by feel. Record pinion flange rotating torque, with a torque wrench. This ring and pinion setup guide is Copyright Crawlpedia.com - Please provide a link back to this page when copying. Many mechanics use an impact gun while others insist the nut should be torqued by hand. Install left-side adjusting nut lock, washer, and bolt. The rear end is full of it. When combined with a low curb weight, this combination creates acceleration so fast it feels almost supernatural. This assembly featured an 8.2-inch ring gear diameter as well as 28-spline axles which provided adequate strength for these 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. Like all Chevy 10-bolts, the axles are retained by C-clips on the inner end of the axle shaft inside the carrier. 1/2" T-bolts - 50 ft lbs. 10.50 PINION NUT: GM . The pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use. I have a 1993 Suburban K1500. 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. I also like to put some oil on the seal surface of the yoke to avoid tearing the new pinion seal. Nut secures driveshaft yoke to pinion gear. Ring gear bolts. 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. The more torque produced, the less energy needed to move the car forward. To reach an accurate level of tension or preload, experience and expertise are usually required when dealing with this type of repair work. It also uses a 10 5/8-inch irregular-shaped cover. Preloading a bearing eliminates the clearance, which increases stiffness and reduces friction. Pinion preload (used bearings): 8 - 10 in*lb. Since listing them all within this article is impossible, well be focusing only on visual identification. If in doubt, consult our staff of differential parts specialists. Next we disassembled everything, starting with the cross pin bolt, cross pin and C clips. It is important to have the right pinion nut for your 8.5-inch 10-bolt rearend. Some vehicles require an 8.5" 10-bolt pinion nut to secure the rear axle assembly of their vehicle. The date and location of manufacture coding changed in 1971. 3/8" T-bolt - 30 ft lbs. :yipi: Thats it?? 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. 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. Backlash = 6-10 (.001 inch) 2003 S-10 ZQ8 - 262/M5:bowtie: 1986 Pontiac Trans Am - 355/A4 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 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. #5. 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. We started by getting a rebuilt kit from Motive Gear . How a GM 10-Bolt Differential Goes Bad. PINION PRELOAD NEW INCH LBS. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Is that really all it takes? When changing a ring & pinion and doing final install of pinion there is no torque spec on the pinion nut itself. Whilethe 10-bolt rearendslineage can be identified by the code stamps, which are usually on the passengers side axle tube, there are literally hundreds ofpotential codes for the three different 10-bolt rearend housings. Here are the thin shims from the Summit crush sleeve eliminator. It is important to keep in mind that this can change dramatically based on specific materials used or other variables so it is critical to be sure to consult any instruction manual included with your differential cover before attempting any installation. Ring and Pinion Gear Tooth Patterns - Gear tooth pattern setup and adjustement instructions. Our custom-length driveshaft kits make it a breeze to get the perfect 67-72 C10 driveshaft length. 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. Tighten to 8 ft-lbs (10 N-m), then tighten an additional 1/3 turn to at least 37 ft-lbs (50 N-M). 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. Ring Gear Backlash Ring Gear Bolts to Cast FT. LBS. 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. 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. Step 1: To seat, torque nut to 50 (lb-ft) while spinning hub. It saved me time and effort trying to crush a brand new crush sleeve. GM: .035. If sticky tires are used, youll quickly turn the 7.5-inch rear into a pile of unusable parts. Mgrotel, nice cliff notes. Dana Technical Service Specs. We will safeguard your e-mail and only send content you request. Follow along as we show how to measure and install a C10 one piece driveshaft.
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