The concept of low-end torque is an important one for drivers to understand when it comes to the performance of a vehicle. What size is pinion nut Silverado? Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! When I changed all the bearings in my suburban rear end, I bought the crush sleeve eliminator shims from Summit. Step 1: To seat, torque nut to 50 (lb-ft) while . 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. Good info on this site from what I've seen so far, kudos. The number of teeth on each of these gears determines how much rotational force is converted into torque or speed. OEM bolts have thread locker on the threads. tighten the nut down till its snug and put on your torque wrench and turn it about 3 revolutions. 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. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? A forum community dedicated to all General Motors truck owners and enthusiasts. Currie 44 : Torque: Pinion Nut (Solid Spacer) 250 ft lbs. 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. How to eliminate unwanted to holes in your car's body, trunk, floor, or firewall with easy to use patch plugs from Speedway Motors. The closer the teeth count is between the two gears, the higher the speed output will be; conversely, if there is a greater difference in tooth count, then more torque will be generated. 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. Mine was a pita. On the other hand, if the preload is set too loose it can cause a whining noise to originate from within the rear end as well as abnormal gear wear due to excessive movement between the two components - eventually leading to failure. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. 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. 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. You can replace the pinion seal without changing the crush sleeve. When changing a ring & pinion and doing final install of pinion there is no torque spec on the pinion nut itself. This heavy duty nut has been designed using high grade steel and features a zinc plated finish for maximum protection against rust and corrosion. lbs.) DIFF MODEL. Call 800.979.0122, 7am-10pm, everyday. 7/16" x all lengths 60-65 ft lb. This is especially true when it comes to cycling. 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. 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 8-inch rear axle looks very much like the popular Ford 9-inch rear axle. An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut. 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. 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. Part Number. (note make sure the pinion bearing is well oiled when doing this procedure.) Axle Retainer Plate Nuts: 3/8" Grade 8 - 45 ft lbs. (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). 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. havent done it, but i have the haynes repair manual and ill type out the steps for you, may take me a second though. Ring Gear Diameter: 8.500Cover Bolts: 10Ring Gear Bolts: 10Ax . Pinion nut has no torque spec. Our Mopar flexplate buyers guide will help. First mark the position of the nut with a chisel or other method so you can tighten it back to exactly the same place. 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. 12 Bolt Rear Axle Torque Specs. Data is accurate to the best of our knowledge and is offered as-is with no guarantee. Preloading a bearing eliminates the clearance, which increases stiffness and reduces friction. The first is to use a crush collar; this involves applying pressure between the yoke and cup until it reaches the desired depth. . We will safeguard your e-mail and only send content you request. 2. unbolt pinion nut. This heavy duty nut has been designed using high grade steel and features a zinc plated finish for maximum protection against rust and corrosion. 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. Alternatively, shims can also be used to adjust the pinion depth. Backlash refers to the distance between two mating gear teeth when they are not engaged. It has a black oxide finish that ensures corrosion resistance while its construction of hardened steel ensures durability even under extreme conditions. This is all with the old crush sleeve. This gives us confidence in the quality of the parts we sell. In most cases, however, even with a straight case, a certain degree of backlash can be tolerated up to 0.005? We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. We look forward to serving you! The 8.5-inch 10-bolt rearend is hugely popular because aftermarket carriers and gears are easily interchangeable. grade 8. Is a GM 10 bolt rear end good? Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. EDLANTA there is a "crush" spacer between the two pinion bearings that when tightened properly gives you the proper bearing preload. Crankshaft Pulley to Crankshaft bolt 77. Torque measures the amount of force that is generated when the engine rotates at a certain speed. 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. Ring gear bolts 65 foot pounds, bearing cap bolts 60 foot pounds. . Rotate the pinion when tightening the nut to seat the bearings evenly. May 22, 2021 / If it takes a 1/2-inch wrench to remove it, its an 8.2. The OEM pinion nut is 1 1/4 inches. While this article focuses specifically on the GM 8.5 10-bolt rear differential, the parts and processes described herein cover most differential housings.Built from the 1970s through today (the 8.6" 10-bolt is still used in most GM . 8-11 in/lbs for broken in bearings is acceptable. It also uses a 10 5/8-inch irregular-shaped cover. Pinion preload (used bearings): 8 - 10 in*lb. Once the specified preload has been obtained, make sure the bearings are seated by rotating the pinion several times. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Sometimes it feels like youre in a race car when you accelerate hard with a high-torque vehicle. 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. Our LS swap adapter kits make it easy! 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. As the speedometer rises, each gear shift is accompanied by an even more intense sensation of power, making every drive exhilarating and unforgettable. When it comes to Chevrolet rearends, its the 12-bolt that seems to get all the accolades. 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. 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. 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 will cause the bearings to press more firmly against the races, thereby increasing preload tension. 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. It said you want this to be from 5-35. I like to slowly tighten the new pinion nut until I take up all of the front to back free play. Bear Preload IN. You can rest assured knowing that your axle is secured with this high quality product. Over 6,000 Automotive Torque Specs. An 8.2 (shown) will have the same contour as the cover. Sometimes when repairing or replacing components within a transmission, you may encounter a crush sleeve. All of the parts we sell are also used every day in our busy service shop. 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. 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. GM: .035. There are other 14b axles out there - a 9.5" ring gear semi-float for one, and even a 11.5 . From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. I used an 18" breaker bar with a 2 foot pipe on the end of it in order . Both axles use a third member that contains the differential, which is made up of the . The Fora platform includes forum software by XenForo. How do you fix a loose pinion bearing preload? By Albert. This should result in approximately 7 thousandths of an inch adjustment in terms of backlash. 8-10 ft lbs: None: None: GM 12 Bolt Car: Torque: Lubricant: Thread Locker: Main Caps: OEM Housing: . . 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. When riding a bicycle, the hardest gear available is sometimes necessary for tackling steep climbs and flats alike. 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. This is an 8.2 BOP axle. You will need a torque meter in inch-lb. Some of the most popular GM vehicles have come with 10-bolt rear ends. Backlash = 6-10 (.001 inch) 2003 S-10 ZQ8 - 262/M5:bowtie: 1986 Pontiac Trans Am - 355/A4 Ring gear bolts. GM 8.875" 12 Bolt Differential Ring Gear and Pinion Set. 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. Check the pinion preload by rotating the pinion with a torque wrench. 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. If youre building a street car and want to improve performance, we all know the drill. If used in a daily driver or cruiser application, the 7.5-inch rearend should survive behind an engine with 350hp, if traction is limited during spirited driving. Typically, 10-bolt differentials are specific to a series of gears. Step 3: Back off 3/8-turn for automatic hubs, and just enough to free the bearing for manual hubs. Mgrotel, nice cliff notes. Save Share. . Differential cap bolt torque: 90 ft*lb. Inch pound torque wrench that will read that low of a number which will be "VERY" costly. 8 to 11 in-lbs. Use Loctite #271 on the bolt threads and torque in a crisscross fashion to 55 ft-lb. 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. 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. You keep on tightening the pinion nut until you are within the in-lb. sny 00235 converted 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. BOP stands for Buick/Oldsmobile/Pontiac. GM 8.6" gears will fit GM 8.5" axles and as such have become the universal aftermarket size for both. ft. The 8.5 rearend will have a round cover, and part of the cover will extend rearward to make room for the ring gear. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! 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. Would this be the same How to write up for my truck?

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