GM 8.5" 10 Bolt / Ring & Pinion Gear Set w/ Master Bearing . Sometimes when repairing or replacing components within a transmission, you may encounter a crush sleeve. You will need a torque meter in inch-lb. 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. 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. All 8.6-inchrears have disc brakes, and 8.5-inch units have drum brakes. 8-10 ft lbs: None: None: GM 12 Bolt Car: Torque: Lubricant: Thread Locker: Main Caps: OEM Housing: . 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. It is important to have the right pinion nut for your 8.5-inch 10-bolt rearend. This heavy duty nut has been designed using high grade steel and features a zinc plated finish for maximum protection against rust and corrosion. The Fora platform includes forum software by XenForo. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. To reach an accurate level of tension or preload, experience and expertise are usually required when dealing with this type of repair work. These protrusions are larger than those on the 7.5 rearend. Find the application and ratio you need? By Albert. 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. Lifted78Chevy. If a bearing system is designed to have no clearance, then preloading is necessary. Failure to apply enough preload on the bearings can have an adverse affect on gear contact patterns. There are a few that have geared axles on here so they should chime in and help out with Real TECH :rocking: EDLANTA there is a "crush" spacer between the two pinion bearings that when tightened properly gives you the proper bearing preload. Fords small block and big block engine families have their share of flexplate differences. 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. Part Number. This ensures all parts remain tightly fitted together without any space between them, resulting in increased stiffness as well as reduced friction within the system as a whole. It is not an uncommon sight to see a Yukon Gear Pinion Nut when it comes to automotive repairs. 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. Currie 44 : Torque: Pinion Nut (Solid Spacer) 250 ft lbs. Unfortunately, unless you have the two units side by side, it is nearly impossible to tell them apart. You have to do it a little differently though. 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. range. The axle shafts are also held in place by four-bolt retainer plates at the outer bearing, not C-clips. For the street/strip car, the 10-bolt rearend is a great choice. 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. Pin. Upgrade your cam, intake, headers, stall converter, and the list goes on from there. The rotating torque must be 2 to 3 N-m (15 - 25 inch pounds). 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. When compressing the crush sleeve, many guys use an impact wrench and end up crushing it too far, ruining the sleeve. GM: .035. This difference can cause issues with accuracy and repeatability in some applications, necessitating either higher-end components or additional compensation mechanisms. Dana Technical Service Specs. MODEL 20. DIFF MODEL. 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. 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. Camshaft thrust Plate bolts 106 in-lbs. . ExtCab96S_Dime . 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. Crawlpedia is an off-road encyclopedia featuring a complete list of proper ring and pinion gear set up torque and backlash specs. It also has an inner diameter of 1 . FORD: .020. Our Mopar flexplate buyers guide will help. Are all GM 10 bolts the same? For reference use at own risk. Rotate the pinion when tightening the nut to seat the bearings evenly. 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 . By following these steps carefully and precisely, you can ensure that your gear and carrier are set up correctly for optimal performance. Nov 18, 2016. Recently a friend enlisted me to help rebuild his 7.5 GM 10 bolt. Automotive Chassis Torque Specs. 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. 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. Install left-side adjusting nut lock, washer, and bolt. Doing a gear ratio change but not sure what you want? Back off left-side adjusting nut approximately 2 slots. 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. Gear Ratio Calculator - Calculate the gear ratio of gears based on their tooth count. 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. 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. When changing a ring & pinion and doing final install of pinion there is no torque spec on the pinion nut itself. The OEM pinion nut is 1 1/4 inches. 6 TO 10. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. What is the torque specs on pinion nut? You can use this instead of the crush sleeve. 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. Sometimes, you need to push yourself. 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. How do you fix a loose pinion bearing preload? 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 . Once you give everything a thorough inspection you can begin the re-assembly process. 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. That way, you dont unknowingly spend money on something you really do not want. DANA SPICER: .035. To begin, the yoke or coupler must be attached to the pinion shaft. We were lucky and had a desirable contact pattern on both the drive and coast sides of the gear teeth. 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. Determining the correct flexplate for your V8 Mopar-powered project takes a little understanding of how these engines were balanced. Differential cap bolt torque: 90 ft*lb. The 7.5 rearend uses an oval cover and the housing has two small cast-in protrusions near two of the bottom cover bolts. Ring and Pinion Ratio Variations - An explanation of why some ring and pinion gear ratios vary. These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. 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. First I measured the old crush sleeve as a starting point. 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. Chrysler 300 and Dodge Charger 2006-2008 Torque Specifications Repair Guide. 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. Next we disassembled everything, starting with the cross pin bolt, cross pin and C clips. It's not easy, but pushing yourself can be rewarding; after all, with hard work come great rewards! Next, attach the pinion nut onto the end of the shaft and use a torque wrench to tighten it to between 110-125 ft/lbs of torque. 2. unbolt pinion nut. For the fastest service, call our Differential Parts Experts at (800) 510-0950 for immediate assistance. 4.replace seal. 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. It refers to how much tension is applied to the spring before it's installed in the vehicle and can be adjusted accordingly. Mine is leaking. 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. 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. If i missed any thing PLEASE tell me. With this pinion nut, you can rest assured that your vehicle will be ready for whatever terrain comes its way! You can replace the pinion seal without changing the crush sleeve. It also uses a 10 5/8-inch irregular-shaped cover. I need the torque on the pinion nut for the rear differential. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. 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. Nut secures driveshaft yoke to pinion gear. How Much Hp Can Stock 5.3 Injectors Handle, What Kind Of Gas Does A Jeep Cherokee Take, Popping Noise When Accelerating And Braking. GM 10 Bolt 8.2; GM 10 Bolt 8.5; GM 12 Bolt 8.875; GM 8.6 IRS; GM Install Kits; MOPAR. 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-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. 7/16" x all lengths 60-65 ft lb. Gear Ratio Finder - Find the ideal axle gear ratio for your new larger or smaller tires. TORQUE SPECIFICATIONS. Is a GM 10 bolt rear end good? Locate a Sierra Gear & Axle Distributor near you. Since listing them all within this article is impossible, well be focusing only on visual identification. 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. 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. There is no way to happiness.happiness is the way. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The GM 8.5" 10 Bolt axle, also known as the GM 8.6" axle or GM 10-Bolt, is available in many front and rear axle . Oct 29, 2001. #5. It saved me time and effort trying to crush a brand new crush sleeve. Chevy Hardcore NEWSLETTER - SIGN UP FREE! 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. Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.). Speedway Motors employees enjoy not only helping our customers, but also turning some wrenches in their downtime as well. It first appeared in 1970 production cars as a corporate replacement for the 8.2-inch 10-bolt rearend. A Series 2 carrierwill work with 2.56 and higher gears (numerically lower) such as 2.41. The small torque . Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear. Preloading a bearing eliminates the clearance, which increases stiffness and reduces friction. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. All of the parts we sell are also used every day in our busy service shop. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 1988 C1500 Silverado, 5.7L with some go fast parts. . 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. FOR 1994-2001 CHEVY S10's & GMC SONOMA's. **ALL TORQUE SPECS ARE PER GM FACTORY & HAYNES MANUAL**. Mikz86TA. Continue tightening the pinion nut to collapse the spacer and preload the bearings. 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. Ring Gear Backlash Ring Gear Bolts to Cast 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. Axle Retainer Plate Nuts: 3/8" Grade 8 - 45 ft lbs. 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. 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. 8-11 in/lbs for broken in bearings is acceptable. I have a 2001 2500 HD. What is the gear ratio on a 10 bolt rear end? You can feel the power of all that torque in your bones as it propels the car forward even faster than before. 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. In either case, it is important that this critical adjustment be performed correctly in order to avoid costly repairs or replacements down the line. 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. PINION PRELOAD NEW INCH LBS. 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. Just out of curiosity,what are the 8.5 (r 65lbft & c 60lbft ?) Final torque on the pinion nut is necessary to compress the crush sleeve. 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. 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. Alternatively, shims can also be used to adjust the pinion depth. We believe that our exceptional customer service and product knowledge is what sets us apart from the competition. Alternate Description. As well as many other third member torque specs from Strange. 1989 Toyota Pickup/3vze/R150F/Dual RF1A's/8.0 Detroit/8.0 Detroit/5" SAS/38 TSL'S. 14 TO 19. The number of teeth on each of these gears determines how much rotational force is converted into torque or speed. This gives us confidence in the quality of the parts we sell. 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. You tighten it until the bearing preload is correct. GM 8.5 10 bolt - 10 bolt cover with 8.5 ring gear. 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. Introduction. Talk to the experts. 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. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. For inquiries about our products and services, please fill out the form below. By Albert. The 8.5 rearend will have a round cover, and part of the cover will extend rearward to make room for the ring gear. The date and location of manufacture coding changed in 1971. When additional shims are added, this increases the total width of the retainer assembly, pushing the bearing cones further away from their respective cups and as a result reducing drag on them. 3.08 and numerically lower gears = 1.660-inch, 3.23 and numerically higher gears = 1.950- inch, 2.73 and numerically lower gears = 1.615-inch, 3.08 and numerically higher gears = 2.00-inch, 2.56 and numerically lower gears = 1.530-inch, 2.73 and numerically higher gears = 1.720-inch. See other Red Line Oil Products that we recommend. 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. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? 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. This is especially true when it comes to cycling. checking the pre load with the inch lb torque . 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. Mine was a pita. Originally, gear ratios ranged from 2.41 through 4.10. . 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. Not only has the 10-bolt rearend proved its worth in high-performance, high-horsepower applications, but it has also been found to be a great unit for street/strip cars. New bearings 19 to 22 inch pounds. We pressed the new bearings onto the carrier and the front pinion bearing and went ahead and put the assembly together into the housing. This process helps increase longevity of both the pinion gear and its tapered bearings while also providing optimal performance from both components at all times. The torque required to seat the nut is very large, possible 200 ft-lbs or more. 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. 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. 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). 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. I don't use it on the bearing cap bolts. Finding a 12-bolt that is affordable, is getting to be anearly impossible endeavor.

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