I got the price for the seal, and it is near $9. If you are installing an axle and need to know the torque specs, it is important to first understand what torque is. The LS swap is no doubt still going strong, but if youre planning to run an automatic behind your 4.8, 5.3, or 6.0L LS-powered ride, youll need to pay attention to a few items we discuss in this buyers guide. 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. These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles. Rotate the pinion when tightening the nut to seat the bearings evenly. This is very important, because if you go too far the crush sleeve will be ruined. 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 sticky tires are used, youll quickly turn the 7.5-inch rear into a pile of unusable parts. 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. We started by getting a rebuilt kit from Motive Gear . 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. 4.replace seal. Since it was so widely used, there is a better possibility of finding one of them at a salvage yard thanlocating a 12-bolt. When the preload of the pinion bearings is incorrectly adjusted, it can have serious consequences. This technology is particularly advantageous in improving vehicle handling and traction under all types of driving conditions, from wet roadways to tight turns. GM 8.5" 10 Bolt / Ring & Pinion Gear Set w/ Master Bearing . Maintaining your car's paint finish is essential to keep it looking great. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles. sny 00235 converted Torque Specs on Dana 60. 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 rotational torque spec is between 15-19. The first is to use a crush collar; this involves applying pressure between the yoke and cup until it reaches the desired depth. If you're looking to get the most out of your pickup truck, you may want to consider changing the gear ratios. Use Loctite #271 on the bolt threads and torque in a crisscross fashion to 55 ft-lb. 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. 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. These have been around since 1975, and were installedunder cars, small trucks, and vans up to the 2005 model year. you have it pretty much. Find the application and ratio you need? Reply Quote. 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. 2008 Sprinter 2500 170 - camper van. Inch pound torque wrench that will read that low of a number which will be "VERY" costly. How tight should a pinion nut be? First I measured the old crush sleeve as a starting point. To do this, measure 10 thousandths of an inch on the shim and shift it accordingly. 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. This method works every time is done precisely as described. With the exception of truck differentials with 30-spline axles, andthosecarrying 2.41 and 2.73 gears (series two), the differentials will support all gear ratios without having to change carriers. Once properly secured in place, you should have no further issues with your pinion nut installation. BOP stands for Buick/Oldsmobile/Pontiac. 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. Mgrotel, nice cliff notes. The distance between the lower center bolt on the cover and either adjacent bolt is 3 3/4 inches. However, when you have new gears, a new posi unit, and other variables like mixing housings with differentials you might have to try multiple shims to get a good pattern. 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. We look forward to serving you! They say ignorance is bliss but I say it's just damn expensive. When riding a bicycle, the hardest gear available is sometimes necessary for tackling steep climbs and flats alike. 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. When looking at the housing from the rear, an 8.5 will have two squared off chunks of casting hanging on each side near the bottom of the differential. This will ensure that your backlash is correct without having to swap the shims. Speedway also offers the . Our custom-length driveshaft kits make it a breeze to get the perfect 67-72 C10 driveshaft length. There are a few that have geared axles on here so they should chime in and help out with Real TECH :rocking: 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. From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. (note make sure the pinion bearing is well oiled when doing this procedure.) Not only is this a wise financial decision for both parties involved, but it also shows how much Chevrolet values customer satisfaction and safety. 2023 Power Automedia. A forum community dedicated to all General Motors truck owners and enthusiasts. Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.). I have a 2001 2500 HD. We believe that our exceptional customer service and product knowledge is what sets us apart from the competition. Used bearings 10 to 14 inch pounds. The correct way to do this is to use the yoke lock (part of the setup tool kit we bought) and use a breaker bar with a cheater pipe. This will help ensure that there isn't an excess of tension on these components, which can lead to premature wear or even failure. You will need to know that there are different series of differentials (seriestwo and three). As a result, this construction became one of the most popular axle assemblies on the market due to its durability and affordability. For that reason,many enthusiasts are considering the 10-bolt. 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. Differential cap bolt torque: 90 ft*lb. 8 to 11 in-lbs. 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. I am also replacing all the bearings on my son's 97 Chevy rear end. 1/2" x all lengths 100-110 ft lb. The carrier bearing rides in the races and you will snap the bolt off before you warp or crack the races. 35-Spline Pinion - 250 ft lbs. The 8.5 rearend will have a round cover, and part of the cover will extend rearward to make room for the ring gear. Shop Differential Pinion Bearing Spacers and Sleeves at Summit Racing. In this context, "hardest gear" refers to the ratio of front sprocket teeth to rear sprocket teeth - typically expressed as 4.55:1. By following these steps carefully and precisely, you can ensure that your gear and carrier are set up correctly for optimal performance. 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. 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. 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. Check the pinion preload by rotating the pinion with a torque wrench. Crankshaft Pulley to Hub Bolts 37. It is robust enough to withstand any punishment inflicted on it by racetrack use. Ring Gear Bolt Torque (Foot lbs) (N.m.) Bearing Cap Torque (Foot lbs) (N.m.) AMC; Model 15 : 20 - 40 (2.3 - 4.5 ) . 2429 Mercantile Drive Suite A 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. 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. As the speedometer rises, each gear shift is accompanied by an even more intense sensation of power, making every drive exhilarating and unforgettable. Upgrade your cam, intake, headers, stall converter, and the list goes on from there. It was in the 30-35 I "think" from GM. 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. Gear Ratio Calculator - Calculate the gear ratio of gears based on their tooth count. . 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. 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. The following table contains the proper specifications for all popular axles. Some builders . 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. Pinion nut has no torque spec. Thanks Mike, Id appreciate it. When installing a new 8.5-inch 10-bolt rear differential, it is important to use the right pinion nut for your application. So, in order to adjust the pinion bearing pre-load, shims of varying thicknesses are inserted into pre-load retainers. 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. The torque required to seat the nut is very large, possible 200 ft-lbs or more. With this pinion nut, you can rest assured that your vehicle will be ready for whatever terrain comes its way! This is all with the old crush sleeve. The Hex is 5/16 the threaded part is SAE 5/16 inch 18 threads per inch. The 8.5-inch 10-bolt rearend is hugely popular because aftermarket carriers and gears are easily interchangeable. A higher engine power combined with more torque enables cars to accelerate faster while using less fuel - making it much more efficient and cost-effective in the long run. Peter - I'm retired but work part time as a pain in the ass. When I changed all the bearings in my suburban rear end, I bought the crush sleeve eliminator shims from Summit. Received 16 Likes on 13 Posts. It saved me time and effort trying to crush a brand new crush sleeve. 1/2" T-bolts - 50 ft lbs. 14 TO 19. 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. This is especially true when it comes to cycling. Save Share. 1989 Toyota Pickup/3vze/R150F/Dual RF1A's/8.0 Detroit/8.0 Detroit/5" SAS/38 TSL'S. A Series 2 carrierwill work with 2.56 and higher gears (numerically lower) such as 2.41. Mine was a pita. 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. 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. 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. 1989 GMC Suburban SLE 2500 4WD 5.7L Granny 4-speed. The following are recommended Differential Set-Up Specifications for various differentials. carrier bearings, races, crush sleeve, pinion nut, pinion seal, a gasket and even has the gear marking grease included. For the street/strip car, the 10-bolt rearend is a great choice. 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.