A 2.6-3.0 gear ratio range is perfect for flat places and most people find this ratio suitable for their needs. 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 . 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. 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 . The 12-bolt is generally considered to be the stronger of the two rear axles. This heavy duty nut has been designed using high grade steel and features a zinc plated finish for maximum protection against rust and corrosion. 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? #5. Instead of using a C-clip to hold the axle in the housing, these axle assemblies use bolt-in axles, much like an 8.2 BOP rearend. If the nut is loose then the crush sleeve must be changed. These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. Once the specified preload has been obtained, make sure the bearings are seated by rotating the pinion several times. 35-Spline Pinion - 250 ft lbs. Find the torque thats on it before hand and tighten it down to that afterwards. This is an 8.2 BOP axle. Im gonna go buy a good manual for shit like this. 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. Vendor Part Number. There is no way to happiness.happiness is the way. Low-end torque refers to the amount of power and force generated by an engine at low revolutions per minute (RPMs), usually between 2000 and 3000. These are two pinion gears for the 8.5-inch 10-bolt. JavaScript is disabled. I also like to put some oil on the seal surface of the yoke to avoid tearing the new pinion seal. The distance between the lower center bolt on the cover and either adjacent bolt is 3 3/4 inches. The easiest way to tell the difference is by looking at the brakes. Peter - I'm retired but work part time as a pain in the ass. If sticky tires are used, youll quickly turn the 7.5-inch rear into a pile of unusable parts. It is essential to ensure that the pinion flange is firmly held in place with a fixture or tool. Follow along as we show how to measure and install a C10 one piece driveshaft. 14 TO 19. Preloading a bearing eliminates the clearance, which increases stiffness and reduces friction. 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. 3/8" x all lengths 45-50 ft lb. Date and location of manufacture are stamped in the axle tube, and this table deciphers the code. If you're looking to get the most out of your pickup truck, you may want to consider changing the gear ratios. Replace original worn or damaged nuts each time a gear set is changed. Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. You keep on tightening the pinion nut until you are within the in-lb. sny 00235 converted Search Car Torque Specifications by Engine or Model Ring gear bolt torque: 110 ft*lb. If it takes a 1/2-inch wrench to remove it, its an 8.2. 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. Camshaft thrust Plate bolts 106 in-lbs. If too tight, the bearings become overstressed and will fail prematurely, causing a catastrophic failure of both the ring and pinion gears. One will want to torque the pinion nut to 190- 240 ft lbs (Small Diff's) D60 and larger 225 -350 Ft lbs with the proper preload achieved. MOPAR: 8.75" x 1.75" pinion: .090. . Tighten to 8 ft-lbs (10 N-m), then tighten an additional 1/3 turn to at least 37 ft-lbs (50 N-M). Inside, the ring-gear bolts are the same as the 8.5 corporate unit, but the pinion-shaft diameter measures 1.438 inches. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. Original gear ratios in pickups can range from 2.41:1 all the way up to 4.10:1, offering a wide variety of options depending on your needs and preferences. 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. 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. What is the gear ratio on a 10 bolt rear end? 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. Sometimes, you need to push yourself. DIFF MODEL. I need the torque on the pinion nut for the rear differential. 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. Skip to main content. 4.replace seal. Find the application and ratio you need? We pressed the new bearings onto the carrier and the front pinion bearing and went ahead and put the assembly together into the housing. . The pinion diameter is 1.438 inches, and has 25 splines. Ring Gear Diameter: 8.500Cover Bolts: 10Ring Gear Bolts: 10Ax . 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. 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. The pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use. A Series 2 carrierwill work with 2.56 and higher gears (numerically lower) such as 2.41. Step 1: To seat, torque nut to 50 (lb-ft) while spinning hub. Looking for a driveshaft for your 67-72 C10? Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.). 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. 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. The 8.5 rearend will have a round cover, and part of the cover will extend rearward to make room for the ring gear. 14 bolts and 10 bolts are different, not sure about changing seals though. 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. The 7.5 rearend uses an oval cover and the housing has two small cast-in protrusions near two of the bottom cover bolts. Once you give everything a thorough inspection you can begin the re-assembly process. Nov 18, 2016. when assembling the pinion into place, include the crush sleeve between the two pinion bearings. without any detrimental effects occurring. First I measured the old crush sleeve as a starting point. The axle shafts are also held in place by four-bolt retainer plates at the outer bearing, not C-clips. These protrusions are larger than those on the 7.5 rearend. I like to slowly tighten the new pinion nut until I take up all of the front to back free play. Find out how to access AutoZone's Torque Specifications Repair Guide for 300, 300C & Magnum 2006-2008, Charger 2006-2008. 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. Speedway also offers the . When combined with a low curb weight, this combination creates acceleration so fast it feels almost supernatural. If a bearing system is designed to have no clearance, then preloading is necessary. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. Well help you determine the correct flexplate for your Chevy engine in this buyers guide. range. I am also replacing all the bearings on my son's 97 Chevy rear end. Set the preload carefully (see "Set Up Specifications") so that the bearings will have a long life. 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. Pinion nut torque (shimmed preload style): 250 ft*lb. 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. GM 10 Bolt 8.2; GM 10 Bolt 8.5; GM 12 Bolt 8.875; GM 8.6 IRS; GM Install Kits; MOPAR. 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. You will need to know that there are different series of differentials (seriestwo and three). We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. Ford 9 inch torque specs; Gear Ratio Calculator; Order Forms. This will cause the bearings to press more firmly against the races, thereby increasing preload tension. 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. Ring gear bolts. Read More. 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. This ring and pinion setup guide is Copyright Crawlpedia.com - Please provide a link back to this page when copying. How involved is the process of changing it?
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