For the street/strip car, the 10-bolt rearend is a great choice. West Coast Differentials has been distributing quality differential and axle parts since 1982. Chrysler 300 and Dodge Charger 2006-2008 Torque Specifications Repair Guide. This is very important, because if you go too far the crush sleeve will be ruined. 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 pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use. 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. With this pinion nut, you can rest assured that your vehicle will be ready for whatever terrain comes its way! Oct 20, 2011. .006" to .010" 120 ft-lbs. 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. If you're looking to get the most out of your pickup truck, you may want to consider changing the gear ratios. Mgrotel, nice cliff notes. It said you want this to be from 5-35. It is essential to ensure that the pinion flange is firmly held in place with a fixture or tool. 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. When installing a new 8.5-inch 10-bolt rear differential, it is important to use the right pinion nut for your application. All 8.6-inchrears have disc brakes, and 8.5-inch units have drum brakes. If it takes a 1/2-inch wrench to remove it, its an 8.2. 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. 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. Usually, when people are discussing gear ratios, theyre referring to the relationship between a pinion gear and a spur gear. 8 to 11 in-lbs. Ring gear bolts. When riding a bicycle, the hardest gear available is sometimes necessary for tackling steep climbs and flats alike. The small torque . I have seen the ring gear bolts, pinion nut and retaining bolt come loose, but never a bearing cap bolt. The pinion nut needs to be torqued to 250 ft/lbs. The 12-bolt is generally considered to be the stronger of the two rear axles. Jul 2, 2020 / 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. Is a GM 10 bolt rear end good? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! How to eliminate unwanted to holes in your car's body, trunk, floor, or firewall with easy to use patch plugs from Speedway Motors. Thick Gears and Carrier Breaks - Thick ring and pinion gears and differential carrier breaks explained. . 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 side bearing preload is the difference of preloads (5) x the gear ratio (3.73) = 18.65. Alternate Description. 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. The pinion nut should then be secured and tightened until there is no bearing play at all. 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. With its superior strength and durability, you can count on your PYN10 pinion nut to remain securely in place for years of reliable service. (note make sure the pinion bearing is well oiled when doing this procedure.) I have a leaky pinion seal and housing seal so I am planning on replacing the seals in the very near future. Differential Locker Comparison - A detailed comparison of popular differentials and lockers. 2/3 drop, HP Tuned, Built 60e, 4.10s, Yukon Duragrip, etc. The reason why it's so hard to turn the pinion nut is because not only are you crushing the crush collar but you're also pressing the outer pinion bearing onto the pinion gear. 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. Sometimes, you need to push yourself. Check the pinion preload by rotating the pinion with a torque wrench. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Mikz86TA. Crankshaft Main Bearing Cap Bolts 70. Ring and Pinion Gear Tooth Patterns - Gear tooth pattern setup and adjustement instructions. Pinion Nut (Solid Spacer) 28-Spline Pinion - 200 ft lbs. If you installed a new seal, add 1 or 2 in-oz. 9 Minutes Read / May 22, 2021 / carrier bearings, races, crush sleeve, pinion nut, pinion seal, a gasket and even has the gear marking grease included. 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. 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. Race-spec ring and pinion gears for desert racing, rock bouncing, and rock . By Albert. 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. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! 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. 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. 2 ways. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. 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. GM 10.5" 14 Bolt: 20 to 35 in-lbs. 8-10 ft lbs: None: None: GM 12 Bolt Car: Torque: Lubricant: Thread Locker: Main Caps: OEM Housing: . 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. With the pinion bearing properly lubricated, increase or decrease . GM 8.875" 12 Bolt Differential Ring Gear and Pinion Set. He is resurrecting a G-Body Chevy Monte Carlo and decided to reuse the original 3.73 gears and a factory GM posi unit. DANA SPICER: .035. It also has an inner diameter of 1 . :yipi: Thats it?? 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. 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 . Is a GM 10 bolt rear end good? 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. You can rest assured knowing that your axle is secured with this high quality product. I don't use it on the bearing cap bolts. **Note the Pinion nut is in INCH pounds Ring Gear Bolts = 55 lb. 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. 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. This website uses cookies or similar technologies to enhance your browsing experience. 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. Call 800.979.0122, 7am-10pm, everyday. without any detrimental effects occurring. 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. TORQUE-TENSION REFERENCE GUIDE Printed in U.S.A. Supply Part Number: 9702365 AS 06/14 Torque Poster . Additionally, it increases load capacity because it prevents misalignment due to vibration or thermal expansion of components. It also uses a 10 5/8-inch irregular-shaped cover. If the nut is loose then the crush sleeve must be changed. To begin, the yoke or coupler must be attached to the pinion shaft. This is in contrast to high-end torque, which describes how much power and force is produced by an engine at higher RPMs, such as 4000 or 6000. Finding a 12-bolt that is affordable, is getting to be anearly impossible endeavor. Step 2: Back off, then torque to 35 (lb-ft) for automatic hubs,or 50 (lb-ft) for manual hubs. Alternatively, shims can also be used to adjust the pinion depth. The rear end is full of it. The reliability of the axle tube and . If youre building a street car and want to improve performance, we all know the drill. Read More. BOP stands for Buick/Oldsmobile/Pontiac. The retaining bolt can be hard enough to get out without using the red high strength Lock Tight on it. While backlash is a necessary component of manufacturing tolerances, it can be a significant source of problems for certain applications. 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. and 12 bolt #s. found these #s at Richmond Gear: Torque specifications. 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 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. Setup Specifications. Take Zach R. for instance. Speedway also offers the . If rotating torque is low, tighten pinion nut in 6.8 Nm (5 ft. There is an anomaly to the corporate 8.5-inch axle assembly that was used in some 1971 and 1972 Buick, Oldsmobile, a few 1969 through 1972 Pontiac vehicles, as well as the 1970 through 1972 Monte Carlo. FORD: .020. This should result in approximately 7 thousandths of an inch adjustment in terms of backlash. Since it was so widely used, there is a better possibility of finding one of them at a salvage yard thanlocating a 12-bolt. 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. The pinion nut is a 32mm or 1 1/4" so you need a socket and adapters for that. 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. 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. Pinion nut torque (shimmed preload style): 250 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 I changed all the bearings in my suburban rear end, I bought the crush sleeve eliminator shims from Summit. minimum is 181 ft-lbs., maximum 325 ft-lbs., keep cranking till you get within the range of 7.8-11.3 in-lbs of preload torque on the pinion. 9 Minutes Read / . 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. 2. unbolt pinion nut. If it checks out you can put your axles back in, C clips on, cross pin and bolt and you are ready to put the cover on and fill it with rear end lube! The OEM pinion nut is 1 1/4 inches. Uses 28 or 30 spline c-clip axles. Upgrade your cam, intake, headers, stall converter, and the list goes on from there. An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut. But, did you know there is more than one style of 10-bolt rearend? Date and location of manufacture are stamped in the axle tube, and this table deciphers the code. Or some do it by feel. LBS. What happens if you have too much backlash in differential. 3. remove yoke from splines. These protrusions are larger than those on the 7.5 rearend. We think top-notch customer service is the most important thing we do. I also like to put some oil on the seal surface of the yoke to avoid tearing the new pinion seal. It was used in different models by all GM divisions with the exception of Cadillac. The rotational torque spec is between 15-19. One intimidating part for a lot of guys is the rear end. Just out of curiosity,what are the 8.5 (r 65lbft & c 60lbft ?) That is theimpetus for why we decided to put this swap meet/junkyard identification guide together. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. For a better experience, please enable JavaScript in your browser before proceeding. There are other 14b axles out there - a 9.5" ring gear semi-float for one, and even a 11.5 . GM 8.6" differentials can be installed in a GM 8.5" axle with the proper conversion bearings. Use oil on the pinion nut washer surface during all assemblies . The date and location of manufacture coding changed in 1971. Since listing them all within this article is impossible, well be focusing only on visual identification. The distance between thebottom center bolt in the cover and its adjacent bolts is 3 1/4 inches. Find the application and ratio you need? When compressing the crush sleeve, many guys use an impact wrench and end up crushing it too far, ruining the sleeve. 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. 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. Many mechanics use an impact gun while others insist the nut should be torqued by hand. This one is not as easy as it sounds. Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear. on new bearings, or 1.2 Nm (10 inch lbs.) lbs. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. The carrier bearing rides in the races and you will snap the bolt off before you warp or crack the races. ALL72156. How a GM 10-Bolt Differential Goes Bad. stock 4L60E on 5th filter/fluid change; 2nd set of drive shaft u . 1. remove d shaft straps push shaft aside. Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.). The 8-inch Ford rear axle was used from the early 1960s to 1980 in small and mid-size passenger cars with six- and small-block V-8 engines. By continuing to use our website, you agree to our Privacy Policy. Locate a Sierra Gear & Axle Distributor near you. Once you give everything a thorough inspection you can begin the re-assembly process. 14 bolts and 10 bolts are different, not sure about changing seals though. It is not an uncommon sight to see a Yukon Gear Pinion Nut when it comes to automotive repairs. Vendor Part Number. I have seen street 12 bolts that . GM: .035. Originally, gear ratios ranged from 2.41 through 4.10. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? Sometimes strength is an important factor when choosing between components, and this is true with the 10-bolt and 12-bolt rearends. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. Not only is this a wise financial decision for both parties involved, but it also shows how much Chevrolet values customer satisfaction and safety. With the carrier removed w/ new bearings pinion bearing preload should measure a rolling torque of 20-30 in/lbs. Next remove the nut and change the seal. 5. put back together and tight pinion nut to specified torque. 24-32 INCH pounds?? when assembling the pinion into place, include the crush sleeve between the two pinion bearings. So, in order to adjust the pinion bearing pre-load, shims of varying thicknesses are inserted into pre-load retainers. 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. New bearings 19 to 22 inch pounds. 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. 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 . The 8-inch rear axle looks very much like the popular Ford 9-inch rear axle. 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. Peter - I'm retired but work part time as a pain in the ass. This procedure is necessary in order to ensure that everything within the drivetrain is working correctly and efficiently. What is the torque specs on pinion nut? Ford 9 inch Torque Specs for Ford 9 inch center Section torque specs. 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. A Series 2 carrierwill work with 2.56 and higher gears (numerically lower) such as 2.41. PINION NUT GM 7.5 8.5. 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. This heavy duty nut has been designed using high grade steel and features a zinc plated finish for maximum protection against rust and corrosion. This means that extra care and attention needs to be taken when installing these components so that they do not become damaged or rendered unusable. Save Share. RING GEAR TORQUE FOOR LBS. 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 sticky tires are used, youll quickly turn the 7.5-inch rear into a pile of unusable parts. I agree that the preload needs to be about 30 inch pounds. Yukon Gear's Pinion Nut makes any job more efficient by ensuring your parts remain secure while providing superior protection from contaminants. These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. 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. When working on the assembly of a differential, there are two methods for adjusting the pinion depth. 3/8" T-bolt - 30 ft 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. Failure to apply enough preload on the bearings can have an adverse affect on gear contact patterns. A forum community dedicated to GMC and Chevy full size owners and enthusiasts. Step 1: To seat, torque nut to 50 (lb-ft) while . 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. The 8.5-inch 10-bolt rearend was used in cars and trucks over a wide range of years. One is the small, 7.5-inch, another is the 8.2-inch, and yettwo more are the 8.5 and 8.6-inch. Thats usually proven when used in high-performance, high-horsepower applications. Many times, if you locate a 10-bolt rearend, its usually a 7.5-inch unit. 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! 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. ft. Part Number. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! 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. Mine was a pita. 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. Some pinion nuts require a special procedure to be properly installed. We show you how to keep that old GM transmission when swapping in an LS engine. I thought the pinion nut would be more like 50-75 FOOT pounds? 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. If too tight, the bearings become overstressed and will fail prematurely, causing a catastrophic failure of both the ring and pinion gears. Replace original worn or damaged nuts each time a gear set is changed. Too much won't hurt anything other than break the bolt. Sometimes, pinion bearing preload can be a tricky procedure. 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. It was first developed for racing cars where superior control on fast corners is essential for success; however, today torque vectoring differentials can be found in many production vehicles as well due to their exceptional performance benefits. 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. Install left-side adjusting nut lock, washer, and bolt. Lifted78Chevy. 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. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. . Inch pound torque wrench that will read that low of a number which will be "VERY" costly. 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. GM 14 Bolt Specs (all data for SRW truck 14 Bolt axle - others may vary - see table on "different 14 bolts" below) . Looking for a driveshaft for your 67-72 C10? Not sure what to do here but I know I'm looking at a boat load of parts I do not have the money for right now so not sure what the hell I'm going to do. Well help you determine the correct flexplate for your Chevy engine in this buyers guide. If you are installing an axle and need to know the torque specs, it is important to first understand what torque is. For a better experience, please enable JavaScript in your browser before proceeding. I have a 2004 Chevy Silverado 1500, 4.8L engine, 4x4, single cab, 6' bed, what are the torque specs for the drive shaft bolts that bolt the drive shaft into the rear end yolk? . The 8.5 rearend will have a round cover, and part of the cover will extend rearward to make room for the ring gear. Speedway also offers the Economy Ring & Pinion Setup Tool we needed. While adjusting preload can provide some relief from overly-stiff or soft springs, ultimately you should replace the springs themselves if they dont provide the desired level of performance. 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. Call 800.979.0122, 7am-10pm, everyday. range. 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. 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. 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. Unfortunately, once the tension on this type of sleeve has been released during installation it cannot be re-used since it will no longer hold the proper tension. We believe that our exceptional customer service and product knowledge is what sets us apart from the competition. What size is pinion nut Silverado? Back off left-side adjusting nut approximately 2 slots. 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 . 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. Pinion bearing preload is measured in inch-pounds, and is a measure of the rolling resistance of the pinion bearings after proper torque has been applied to the pinion nut. Is that really all it takes? Once properly secured in place, you should have no further issues with your pinion nut installation. 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. Unfortunately, once this tension has been released the crush sleeve cannot hold it again. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. 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. 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. I used an 1/4" inch-lb torque wrench with two adapters and a 1 1/16" socket to check the preload. 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.

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