When working on the assembly of a differential, there are two methods for adjusting the pinion depth. 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. Learn more about GM steering column identification, GM steering column lengths, and GM steering column compatibility. Chrysler 300 and Dodge Charger 2006-2008 Torque Specifications Repair Guide. Tips For Rebuilding A GM 8.5" 10-Bolt Rear Differential .006" to .010" 120 ft-lbs. Take Zach R. for instance. Torque / Capacities - Currie Enterprises Bearing Cap Torque (Foot Lbs.) 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 . 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. If a bearing system is designed to have no clearance, then preloading is necessary. A 2.6-3.0 gear ratio range is perfect for flat places and most people find this ratio suitable for their needs. I used an 18" breaker bar with a 2 foot pipe on the end of it in order . 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. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. 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. Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.). Preload plays an important role in many machine designs for its ability to reduce wear and tear on critical components while improving efficiency and accuracy. If it takes a 1/2-inch wrench to remove it, its an 8.2. How involved is the process of changing it? (Note: The 7.5 GM rear used different pinion bearings in 1979-80 vs. the 81-up axles, so you want to make sure that the old bearings match up to your new pinion bearings). Ring gear bolts 65 foot pounds, bearing cap bolts 60 foot pounds. As a result, this construction became one of the most popular axle assemblies on the market due to its durability and affordability. Technical Specifications - Down To Fab 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. Fords small block and big block engine families have their share of flexplate differences. 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! We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. It is therefore important to strike a balance by carefully adjusting the backlash so that it meets manufacturer requirements for that particular differential system. 1/2" T-bolts - 50 ft lbs. Just out of curiosity,what are the 8.5 (r 65lbft & c 60lbft ?) Connecting Rod Cap Nuts 38. Follow along as Zach works over the old 10 bolt and brings it back to life. 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. 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 . 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. 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. Mine is leaking. Ring gear bolts. 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. without any detrimental effects occurring. Many mechanics use an impact gun while others insist the nut should be torqued by hand. 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. It also uses a 10 5/8-inch irregular-shaped cover. When it comes to Chevrolet rearends, its the 12-bolt that seems to get all the accolades. Torque Specs Dana 60 | Off Road Vehicles 14 bolts and 10 bolts are different, not sure about changing seals though. Many times, if you locate a 10-bolt rearend, its usually a 7.5-inch unit. 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. Step 1: To seat, torque nut to 50 (lb-ft) while . 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. The first is to use a crush collar; this involves applying pressure between the yoke and cup until it reaches the desired depth. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. Well show you what to look for in this buyers guide. We believe that our exceptional customer service and product knowledge is what sets us apart from the competition. This is done in order to decrease pre-load on the bearings; adding more shims will have an overall effect of decreasing it. 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. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? How tight should a pinion nut be? Skip to main content. The inch pound rating is the force required to turn the pinion after the crush sleeve has been crushed. Chevrolet GM 8.875 Inch 12 Bolt Truck Ring and Pinion Sets 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. 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. For a better experience, please enable JavaScript in your browser before proceeding. Oct 20, 2011. Gear oil is nasty stuff, mostly in smell. 4.replace seal. 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. In this context, "hardest gear" refers to the ratio of front sprocket teeth to rear sprocket teeth - typically expressed as 4.55:1. 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. If in doubt, consult our staff of differential parts specialists. Reply Quote. 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. That does not describe how tight the pinion nut needs to be however. 9 Minutes Read / The number of teeth on each of these gears determines how much rotational force is converted into torque or speed. 2008 Sprinter 2500 170 - camper van. The 12-bolt is generally considered to be the stronger of the two rear axles. See all 36 photos. Good luck finding one of these, however, as they are very popular among performance enthusiasts. Originally, gear ratios ranged from 2.41 through 4.10. One is the small, 7.5-inch, another is the 8.2-inch, and yettwo more are the 8.5 and 8.6-inch. Have a seal puller if possible, makes getting the old one out a lot easier. Pinion Bearing Preload (New) (inch/lbs) Pinion Bearing Preload (Used) (inch/lbs) Backlash (.001 in) Ring Gear Bolt Torque (Foot lbs.) Next we disassembled everything, starting with the cross pin bolt, cross pin and C clips. . 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 . When compressing the crush sleeve, many guys use an impact wrench and end up crushing it too far, ruining the sleeve. This assembly featured an 8.2-inch ring gear diameter as well as 28-spline axles which provided adequate strength for these vehicles. 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. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The rotating torque must be 2 to 3 N-m (15 - 25 inch pounds). 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. It has a black oxide finish that ensures corrosion resistance while its construction of hardened steel ensures durability even under extreme conditions. 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. West Coast Differentials has been distributing quality differential and axle parts since 1982. 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). GM 10-bolt 8.5-inch Differentials | Hemmings Alternatively, shims can also be used to adjust the pinion depth. Many times when you are rebuilding an existing rear end you want to save the original pinion bearing shim and re use it under the new bearing. Find the torque thats on it before hand and tighten it down to that afterwards. Repairing your C2 and C3 Corvette Rearend - MotorTrend First I measured the old crush sleeve as a starting point. Ring and Pinion Ratio Variations - An explanation of why some ring and pinion gear ratios vary. We pressed the new bearings onto the carrier and the front pinion bearing and went ahead and put the assembly together into the housing. Like all Chevy 10-bolts, the axles are retained by C-clips on the inner end of the axle shaft inside the carrier. MOPAR: 8.75" x 1.75" pinion: .090. . This is an 8.2 BOP axle. To do this, measure 10 thousandths of an inch on the shim and shift it accordingly. Data is accurate to the best of our knowledge and is offered as-is with no guarantee. Thats usually proven when used in high-performance, high-horsepower applications. 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. The 8.5-inch 10-bolt rearends have ten 3/4-inch hex head bolts with 7/16-20-inch left-hand thread bolts that hold the ring gear to the carrier. Failure to apply enough preload on the bearings can have an adverse affect on gear contact patterns. CHECK FREQUENTLY as you progressivley tighten the pinion nut. #5. 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.) We look forward to serving you! I agree that the preload needs to be about 30 inch pounds. This technology is particularly advantageous in improving vehicle handling and traction under all types of driving conditions, from wet roadways to tight turns. All of the parts we sell are also used every day in our busy service shop. FOR 1994-2001 CHEVY S10's & GMC SONOMA's. **ALL TORQUE SPECS ARE PER GM FACTORY & HAYNES MANUAL**. Setup 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. 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. Bear Preload IN. Rear end pre load torque | Chevy and GMC Duramax Diesel Forum MODEL 20. ExtCab96S_Dime . 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. carrier bearings, races, crush sleeve, pinion nut, pinion seal, a gasket and even has the gear marking grease included. 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. To begin, the yoke or coupler must be attached to the pinion shaft. The "feel" people are way more experienced that you or I so the top one is re-commended. Once you get close to the right pinion preload, shim thickness adjustments need to be made in the .003 and down range to make adjustments, small increments make a big difference in pinion preload. One intimidating part for a lot of guys is the rear end. Ultimately, both engine power and torque play important roles in determining a cars performance capability as well as its overall efficiency. Mine was a pita. 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. 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. We have your differential parts in stock ready to ship today. 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 . Its strength and reliability have been proven time again, making it an excellent option for drivers looking for reliable performance from their vehicle. If you are installing an axle and need to know the torque specs, it is important to first understand what torque is. 1/2" x all lengths 100-110 ft lb. Typically, 10-bolt differentials are specific to a series of gears. Pinion nut torque spec. | S-10 Forum I got the price for the seal, and it is near $9. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The rotational torque spec is between 15-19. Pinion Lock Bolt Torque Specs - YouTube Doing a gear ratio change but not sure what you want? Replace original worn or damaged nuts each time a gear set is changed. Torque specs for Pinion Nut on rear end Yoke | Team Camaro Tech 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. 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. 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? 2023 Power Automedia. This tension is achieved through a collapsible spacer which is placed between the bearings and then compressed by turning the pinion gear nut. need rear diff torque specs - Diesel Place As the speedometer rises, each gear shift is accompanied by an even more intense sensation of power, making every drive exhilarating and unforgettable. You will need a torque meter in inch-lb. When installing a new 8.5-inch 10-bolt rear differential, it is important to use the right pinion nut for your application. 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. Here's a link to when I did mine. To reach an accurate level of tension or preload, experience and expertise are usually required when dealing with this type of repair work. When a very slight increase in pinion turning effort is noted, check the pinion rotating torque using an inch-pound torque wrench. Ford 9 inch Torque Specs for Ford 9 inch center Section torque specs. Axle Order Form; Floater Axle Order Form; Custom Driveshaft Order Form; . An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut. Call 800.979.0122, 7am-10pm, everyday. An 8.2 (shown) will have the same contour as the cover. 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. Before disassembly, we marked the bearing caps and kept the side bearing shims on the correct side. JavaScript is disabled. Crawlpedia is an off-road encyclopedia featuring a complete list of proper ring and pinion gear set up torque and backlash specs. 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. Rebuilding the GM 10-Bolt Rear Axle - MotorTrend Yukon Gear's Pinion Nut makes any job more efficient by ensuring your parts remain secure while providing superior protection from contaminants. Pinion nut has no torque spec. Backlash = 6-10 (.001 inch) 2003 S-10 ZQ8 - 262/M5:bowtie: 1986 Pontiac Trans Am - 355/A4 You keep on tightening the pinion nut until you are within the in-lb. What is the torque on the pinion yoke nut - JustAnswer Record pinion flange rotating torque, with a torque wrench. 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. The distance between the lower center bolt on the cover and either adjacent bolt is 3 3/4 inches. 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. 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. If too tight, the bearings become overstressed and will fail prematurely, causing a catastrophic failure of both the ring and pinion gears. 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. 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. 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. Our custom-length driveshaft kits make it a breeze to get the perfect 67-72 C10 driveshaft length. Like the 8.2-inch 10-bolt, the 8.5 10-bolts use C-clips to retain the axles. It said you want this to be from 5-35. Some of the most popular GM vehicles have come with 10-bolt rear ends. In most cases, however, even with a straight case, a certain degree of backlash can be tolerated up to 0.005? 1989 GMC Suburban SLE 2500 4WD 5.7L Granny 4-speed. torque specs 8.5 rear | NastyZ28.com The more torque produced, the less energy needed to move the car forward. Back off left-side adjusting nut approximately 2 slots. 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. It is not an uncommon sight to see a Yukon Gear Pinion Nut when it comes to automotive repairs. History and Identification of Chevy 10 and 12 Bolt Chevy Differentials 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. GENERAL MOTORS: APPLICATION: FT-LBS / ( N-m) AXLE SHAFT FLANGE BOLT 'S' BODY CAR: 27 (37) TRUCKS: 60 (82) AXLE SPINDLE NUT 'A' BODY: 192 (261) 'C' 'E' 'H' & 'K' BODIES : 180 (245) 'J' & 'L' BODIES . 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.