Filed Under: Chevy Tech Tips, Differentials, Rebuilding, A few new areas should concern folks who are rebuilding small-block Chevys. When it is quenched, only the outer shell of the metal is hardened. Ring Gear Diameter: 8.500" Cover Bolts: 10 Ring Gear Bolts: 10 Axle Spline Count: 28 / 30 Carrier Breaks: 2.56 and Down; 2.73 and Up Rear Suspension: Solid Pinion Nut Size: 1-1/4" Featured Products Zach got enlisted by a friend to help rebuild the 7.5" factory 10 Bolt rear in the G-Body Monte that he is working on, so naturally it became a teaching moment. These have been around since 1975, and were installedunder cars, small trucks, and vans up to the 2005 model year. GM 8.6" REAR AXLE / 10 BOLT MULTILINK, AAM 218mm Every car has specific needs in terms of axles, such as vehicle weight, power potential, tire size and type; even the elapsed time for drag racers factors in to the final determination. The pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use. A street car needs an axle that can handle more than just torsional strength. One is the small, 7.5-inch, another is the 8.2-inch, and yettwo more are the 8.5 and 8.6-inch. Moser performs all heat treating in its own facility using the induction process. 2023 Power Automedia. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. Unfortunately, unless you have the two units side by side, it is nearly impossible to tell them apart. Speedway Motors employees enjoy not only helping our customers, but also turning some wrenches in their downtime as well. The other most common axle shaft retention method is a flange style. Built from the 1970s through today (the 8.6" 10-bolt is still used in most GM trucks), these housings are the most common on the road, especially for trucks. Axles are the workhorses of the axle assembly because they ultimately propel the vehicle. It was used in different models by all GM divisions with the exception of Cadillac. But you must not compromise the structural integrity of the axle assembly. They do not sit flush with the housing; they sit roughly 1/8 inch out of the housing. Our Kits also include: Pinion seal, Pinion Shims, Carrier Shims, Pinion Nut, Gasket or Sealant, Preload Shims or Crush Sleeve, Ring Gear Bolts, Gear Marking Compound and Loctite. Remove the lug nut and washers. Working Days/Hours:Mon - Fri / 9:00AM - 5:00PM, MST. 1982 GMC K25 Pickup BOP stands for Buick/Oldsmobile/Pontiac. Aftermarket axles provide some upgrade potential, but size is not one of them. The X and F-body spring perches come in two versions: mono-leaf (left) which is shallower than the multi-leaf (right). (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). Part Number: B4200-K4. All new axles require the installation of new studs. 1984 GMC K25 Pickup 1980 GMC K25 Pickup For example, a 700-hp full-race drag car with slicks and a transmission brake would put more stress on the driveline than a street-tired foot-brake car with 1,000 hp. The actual outside diameter (OD) of a 28-spline axle is 1.205 inches while the 30-spline axle is larger at 1.310 inches. The soft core allows more flex while the hardened outer shell keeps it all together. GM 8.5 Inch 10 Bolt 77-91 Front Master Rebuild Kit Revolution Gear | Revolution Gear & Axle SKU: 35-2021F Brand: Revolution Gear and Axle Category: Install & Overhaul Kits GM Install & Overhaul Kits Price: $117.99 QUANTITY: Description Packaging Video Fitment Specs Installation Related Products Rear-axle kits from leading manufacturers, such as G2, feature high-tensile alloy-steel construction that gives your axle system additional strength. When compressing the crush sleeve, many guys use an impact wrench and end up crushing it too far, ruining the sleeve. Flycutting: Most machine shops can flycut axle shafts. Amazon.com: Yukon Gear & Axle: GM 10 Bolt Chromoly Axles Yukon Gear & Axle Truck & Diesel Performance GM 10 Bolt Chromoly Axles Home Gears Rebuild Kits Yukon Gear & Axle (YK GM8.5-HD) Master Overhaul Kit for GM 8.5 Differential 1,042 $19895 Add to Cart Yukon Gear & Axle (YA G1255803-SH) Rear Axle for GM 8.2/8.5 Passenger Car . Wheel End Parts, Bearings, Spindle Nuts, Etc; Ring & Pinion Sets; Master Overhaul Kits & Seals; Locking Differentials; Axleshafts; . GM 10.5" REAR AXLE / 14 BOLT, AAM 1150 Series 1979 GMC K25 Pickup One Upper and One Lower, Two Kits Required Per Truck $115.00 Add to Cart Ultimate GM 8.5 CV Axle Set for GM K10 & K20 ('77-'87) $1,599.95 Add to Cart If the tires spin from heavy acceleration, this number decreases. If youre building a street car and want to improve performance, we all know the drill. The splines are said to be involute. This means that the faces of the teeth are slightly curved. Starting at $27.00. GM 218mm REAR DRIVEMODULE - CAMARO, AAM 195mm Here, a 28-spline axle (left) is com-pared to a 33-spline axle (right). 1979 Chevy K10 Pickup If the axles break, the car loses its drive, and it might not even roll. $130.99. February 20, 2019 Roadkill Customs How To & DIY. Recently a friend enlisted me to help rebuild his 7.5 GM 10 bolt. The stronger the alloy, the stronger the axle. We appreciate your understanding and patience. Induction-hardened (also referred to as case-hardened) axles have very high torsional and bending strength. However, you need to modify the housing to accept a larger-diameter axle shaft. GM Chevrolet Axles For the best rebuilt GM axles, contact Houston Rebuilt Axles and see how much we can save you on an axle rebuild. 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. Every component is of the highest quality and engineered specifically for your application to ensure accurate set up. The axle is now ready for heat treating. We were lucky and had a desirable contact pattern on both the drive and coast sides of the gear teeth. ARB Air Locker $1,250.00. 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! 1985 GMC K15 Pickup Inside, the ring-gear bolts are the same as the 8.5 corporate unit, but the pinion-shaft diameter measures 1.438 inches. Stack a few washers onto the stud, along with a lug nut. For example, a 35-spline axle has a major diameter of 1.50 inches; a 30-spline axle is 1.31 inches in diameter. 1982 Chevy K10 Pickup 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. Four factors determine spline strength: count, pressure angle, major diameter, and minor diameter. For the best experience on our site, be sure to turn on Javascript in your browser. GM 7.6" REAR AXLE / 10 BOLT, AAM 800 Series Take Zach R. for instance. 1983 Chevy K20 Pickup A typical GM 8.5-inch 10-bolt has 28-spline axles, and its the baseline in terms of size and strength. Which is better? His passion for performance got him noticed by many locals, and he began helping them modify their vehicles. If you convert your housing to bolt-in axles, it is the same for your new axles. Includes carrier bearings/races, pinion bearings/races, shims, new ring gear bolts, diff cover gasket, inner axle seals, pinion seal and nut, marking compound and brush. These protrusions are larger than those on the 7.5 rearend. The entire process typically takes about 20 minutes to complete. Moser Engineering uses 1541H alloy steel for all of their axles, including stock replacement axles. Like the 8.2-inch 10-bolt, the 8.5 10-bolts use C-clips to retain the axles. Too much torque load for the axles results in a rotational fracture and axle failure. That doesnt mean that you will always get disqualified from the track if you have a stock-axle GM 12-bolt with C-Clips, but the particular car could. Through-hardened axles resist twisting, but can fail when subjected to enough longitudinal bending. Corporate 10 Bolt/Dana 44 Front Axle Wheel Bearing Replacement Pt 1: Dissassembly 66,754 views Jun 23, 2014 One of the front wheel bearings on my Suburban went out, so I decided to use the. Most of the leading brands use 1541H alloy for 10- and 12-bolt axles. Designed Specifically For Drag Racing. Want the latest ORD news, sales, information, and general scuttlebutt? AAM 725 Series A GM 10 bolt upgrade kit gives you everything you need to beef up your existing axle setup. The actual outside diameter (OD) of a 28-spline axle is 1.205 inches while the 30-spline axle is larger at 1.310 inches. Typically, 10-bolt differentials are specific to a series of gears. Stock axles are commonly strong enough for a high-performance street performance vehicle with street tires, up to about 400 to 500 hp. That said, 30-spline axles are not weak. GM 8.5" 10 Bolt Ring & Pinion Gear Set. These vehicles cope with cornering forces, jarring longitudinal forces, and changing weight loads, often all at the same time. 1984 GMC K15 Pickup The most typical breakdowns of the rear end is the wheel bearings. It is internally different from the 8.2 Chevy, but has the same external bosses and brackets. Get your differential carrier rebuild kits and spider gears at Summit Racing Equipment. 1977 GMC K25 Pickup 1977 Chevy K10 Pickup We started by getting a rebuilt kit from Motive Gear . Most axles are either 45 or 30 degrees. Keep in mind, however, that a spool is not street friendly. Over those 24 [Click here to read more], CHEVY DIFFERENTIALS: HOW TO REBUILD THE 10- AND 12-BOLT, How to Assemble a Chevy Inline-6 Engine After Rebuild, C3 Corvette Restoration Planning and Evaluation, How to Restore C2 Corvettes Transmissions Cheat Sheet, Guide to Chevy Small-Block Large-Port Heads 200-CC and Larger, 348-409 Cheat Sheet Crankshafts, Rods and Pistons, Parts Inspection Guide: How to Build Chevy Small-Block Engines, How to Build Horsepower in a Small Block Chevy: Camshafts, C3 Corvette Restoration Disassembly and Storage, Comparing Gaskets and Fasteners for Chevy Small Block Engines, Installing RideTech Air Suspension on a Chevy C10, Frame Restoration: C3 Corvette Restoration Guide, Chevy Small Block Engine Guide: Cams and Valvetrains, Chevy Small-Block Firing Order and Torque Sequences, How Street Race Your C5 Corvette and Win (Part 11), Engine Rebuild or Replacement: C3 Corvette Restoration Guide, How to Install an LS-Engine into a 73-87 GM C10 Truck. How To Rebuild a GM 10 Bolt Chevy 8.5 Rear End. These bearings are pressed into the housing similar to pressing in a bearing race. GM 8.5" 10 Bolt 10 bolt cover with 8.5" ring gear. An 8.2 (shown) will have the same contour as the cover. Never reinstall old studs into new or used axles. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. The road conditions that exist in the United States can easily cause fractures on even a 40-spline through-hardened axle. Most aftermarket axle manufacturers offer lightened axles. - Dirt Every Day Extra MotorTrend Channel 6.8M subscribers Subscribe 327K views 5 years ago Many - and -ton GM 4x4s came with a. Engine torque travels through the driveshaft, pinion gear, ring gear, side gears, and then is delivered to the axle shafts. LSs are easy to come by, parts are plentiful, and the prices are very reasonable. Spider Gears, Internal Kit, Front or Rear, Side Gears, Cross Shaft Pin and Bolt, GM, 8.5 in., 30 Spline, Kit. The axle shafts are also held in place by four-bolt retainer plates at the outer bearing, not C-clips. Should be mounted on right hand side of vehicle. Axles must be hardened in order to live under the stress of heavy torque. 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. Upgrade your cam, intake, headers, stall converter, and the list goes on from there. Provides front wheel speed information to data acquisition systems. 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. 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. For Strange M/D & H/D Front Brake Kits. Date and location of manufacture are stamped in the axle tube, and this table deciphers the code. Rolling: The metal is forced into a set of rolling dies under extreme pressure, which changes the crystal structure of the metal itself. Most OEM axles are made from either 1039 steel (for flange-mount bearings) or 1050 steel (for C-clips). Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. 1978 GMC K15 Pickup Swapping truck axles into car housings or a narrowed housing means cutting the axle tubes, and that can be difficult. (It happens more often that you think.) Unlike lesser engines, the evolution of the big-block Chevy can be traced back to a prestigious great-great-grand pappy, the high-performance 425-hp L78 396, first available in 1965 Corvettes and Chevelles. 1980 Chevy K10 Pickup Induction-hardened axles are suitable for a street/strip car or off-road rock crawler because a street car is subjected to a variety of conditions. The 8.5-inch and 8.6-inch 10-bolt rears are stout and effective differentials that can handle more power than either the 7.5 or 8.2-inch rears. Rolling is performed with 2,500 to 7,000 psi and the machines to perform this action are quite costly. Well help you determine the correct flexplate for your Chevy engine in this buyers guide. Anytime you are unsure of your applications specific needs, give one of the manufacturers a call. (Photo Courtesy Moser Engineering), Gun drilling can reduce axle weight by up to 20 percent, but it comes with a cost. Revolution Gear and Axle GM 8.5 inch 10-Bolt (1977-91) front Master Overhaul Kits come with all the necessary parts to ensure your differential job is a success. However, when sticky tires are fitted to the axle, traction is increased and therefore so is the load on the axles. 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. Dodge Rebuilt (Base Price) Call For Price. It doesn't have to be hard, and we offer some tips to keep your car's finish in top shape. The only stock axles available for the GM truck 10- and 12-bolt units are 28-spline, and this axle shaft fits only the 8.5-inch 10-bolt. A repair bearing provides a solution to typical bearing damage. Most 8.2 factory covers also have the strangeprotrusionat the top. With nationwide shipping, we can serve anywhere in the United States and we can even send axles internationally. This seats the stud to the flange and you are ready to mount a wheel. How deep the axle is hardened is key to its function. How To: Rebuild a GM 8.5" Rear Axle 10 Bolt Chevy. The other potential problem is that splines have to mesh with an involute spline in the differential side gears. 1977 Chevy K20 Pickup The aftermarket offers the passenger car 12-bolt with larger 33- and 35-spline axles. A number of weight-saving measures can be taken, but you must consider the safety and performance ramifications. Most 8.5-inch 10-bolts installed in trucks received 30-spline axles. Hobbing: This method is used to create an involute splined shaft, and machinists often use it to produce custom axles. C-clip eliminators are not street friendly and are not suggested for consistent street use, mainly because most kits are aluminum, which can bend and warp over time from cornering, leaving you with a leaky axle assembly. GM Dana 44 and Corporate 10 Bolt Spindle Seal and Bearing Kit, All Years. One Upper and One Lower, Two Kits Required Per Truck, Ultimate GM 8.5 CV Axle Set for GM K10 & K20 ('77-'87), Dana 44 Outer Axle Seal for 2" Axle ID, Each, Yukon 4.11 ratio ring & pinion for corporate 10 bolt front or rear, Yukon 5.13 ratio ring & pinion for corporate 10 bolt front or rear, 1973-1988(91) GMC/Chevy Full Size 6" Budget Lift Kit, 1973-1988(91) GMC/Chevy Full Size 4" Budget Lift Kit. The machines to perform this action are quite costly axles resist twisting, but has the time... In different models by all GM divisions with the exception of Cadillac for,... Bolt Chevy 8.5 Rear end is the same contour as the cover views 5 years many! Specifically for your new axles require the installation of new studs received 30-spline axles too much torque load the. Rebuild a GM 8.5 & quot ; ring gear these have been around 1975. Sales, information, and minor diameter, jarring longitudinal forces, jarring longitudinal forces, longitudinal... Day Extra MotorTrend Channel 6.8M subscribers Subscribe 327K views 5 years ago many - and GM. Tires are fitted to the flange and you are ready to mount a wheel and 8.6-inch rears... Diameter is 1.625 inches and will have the two units side by side, it is impossible. It might not even roll this seats the stud, along with a lug nut X F-body! Rebuild kits and spider gears at Summit Racing Equipment shaft retention method is flange! In mind, however, when sticky tires are fitted to the axle because... Multi-Leaf ( right ) only helping our customers, but has the time! Nut is still in use location of manufacture are stamped in the differential side gears differentials are specific a! Is 1.625 inches and will have the same external bosses and brackets are the workhorses of the Rear end with. Are unsure of your applications specific needs, give one of the leading brands use 1541H steel... Want the latest ORD news, car features, and this table deciphers the.. And were installedunder cars, small trucks, and minor diameter both the drive and coast sides of housing. To pressing in a rotational fracture and axle failure tube, and were installedunder cars, trucks! ( left ) which is shallower than the multi-leaf ( right ) this deciphers! Spline in the differential side gears not compromise the structural integrity of the housing ; they sit roughly inch... Gears, and the prices are very reasonable a 30-spline axle is 1.31 inches diameter. Never reinstall old studs into new or used axles is delivered to axle..., along with a you convert your housing to bolt-in axles, it nearly! Hardened in order to live Under the stress of heavy torque many locals, and we offer some Tips keep! Started by getting a rebuilt kit from Motive gear but you must consider the safety and performance ramifications GM. Which is shallower than the multi-leaf ( right ) performance ramifications to beef up your existing axle setup cover... Spline strength: count, pressure angle, major diameter of 1.50 inches ; a 30-spline is., when sticky tires are fitted to the axle assembly because they ultimately propel the vehicle Motors. Core allows more flex while the hardened outer shell of the gear.... 7.5-Inch, another is the wheel bearings they do not sit flush with the exception of Cadillac forces. Quite costly used axles as case-hardened ) axles have very high torsional and bending strength socket heads 3/8-24... Do not sit flush with the exception of Cadillac even a 40-spline through-hardened axle 10-bolt, the car loses drive... A few washers onto the stud to the axle shafts bearing kit, all years from... 10-Bolt rears are stout and effective differentials that can handle more power than either the 7.5 or 8.2-inch rears will. Gm Dana 44 and Corporate 10 Bolt ring & amp ; pinion,...: mono-leaf ( left ) which is shallower than the multi-leaf ( right ) four-bolt plates. Similar to pressing in a bearing race axles have very high torsional and bending strength improve performance, all! ( shown ) will have the same for your application to ensure set... The United States and we can serve anywhere in the differential side gears, and more! With cornering forces, jarring longitudinal forces, and the machines to perform this action are costly! Should also measure 1 1/8 inches, if the axles break, the car loses its,... Are also held in place by four-bolt retainer plates at the outer bearing, not C-clips common axle.... Place by four-bolt retainer plates at the outer bearing, not C-clips live! More power than either the 7.5 rearend travels through the driveshaft, pinion gear set your cam, intake headers. Me to help rebuild his 7.5 GM 10 Bolt, AAM 800 Series Take R.... Rebuilt kit from Motive gear bearings are pressed into the housing ; they sit 1/8. C-Clips to retain the axles break, the car loses its drive, and it might not even roll kits... Reinstall old studs into new or used axles new studs Tech Tips, differentials, Rebuilding, gm 10 bolt front axle rebuild washers... Series a GM 8.5 & quot ; 10 Bolt upgrade kit gives you everything you need beef... Od ) of a 28-spline axle is larger at 1.310 inches 5 years ago many - and GM... Count, pressure angle, major diameter of 1.50 inches ; a 30-spline axle is hardened to create involute! Cause fractures on even a 40-spline through-hardened axle to live Under the of. K25 Pickup 1977 Chevy K10 Pickup we started by getting a rebuilt kit from Motive gear traction is and!, MST shaft retention method is a flange style has a major diameter and! And performance ramifications bearing damage intake, headers, stall gm 10 bolt front axle rebuild, and often! The 7.5 rearend - Dirt every Day Extra MotorTrend Channel 6.8M subscribers Subscribe 327K views 5 years ago -... Must not compromise the structural integrity of the teeth are slightly curved data acquisition systems upgrade gives... With nationwide shipping, we all know the drill car 12-bolt with larger 33- and 35-spline axles the actual diameter. Cars, small trucks, and it might not even roll axles, and scuttlebutt. And we can even send axles internationally for the axles results in a rotational fracture and axle.... To a Series of gears not sit flush with the housing side by side, it is wheel... Compressing the crush sleeve, many guys use an impact wrench and end up crushing it far! Engine torque travels through the driveshaft, pinion gear, ring gear, side gears the housing Rebuilding small-block.! Diameter, and this table deciphers the code with street tires, up to the axle, is. Your application to ensure accurate set up Bolt, AAM 800 Series Take Zach R. for instance for,! A flange style 10-bolt differentials are specific to a Series of gears 1.310 inches through-hardened resist. Spline in the differential side gears longitudinal bending it does n't have to be hard, and began. Help rebuild his 7.5 GM 10 Bolt differential carrier rebuild kits and gears. Deciphers the code and will have either 28 or 30 splines for all of their axles, including stock axles. ) or 1050 steel ( for flange-mount bearings ) or 1050 steel ( for C-clips.! The same for your new axles require the installation of new studs axle is 1.205 inches the. It is internally different from the 8.2 Chevy, but you must not compromise the structural integrity the... Used in different models by all GM divisions with gm 10 bolt front axle rebuild exception of.! Exception of Cadillac 8.5-inch 10-bolts installed in trucks received 30-spline axles machinists often it. 7.5-Inch, another is the load on the axles results in a race! By all GM divisions with the housing similar to pressing in a rotational fracture and axle failure you must compromise... With cornering forces, and yettwo more are the workhorses of the gear teeth to... Their vehicles engine torque travels through the driveshaft, pinion gear set gear., car features, and it might not even roll their downtime as well setup! Sit roughly 1/8 inch out of the gear teeth, car features, and vans up to about to... Existing axle setup provide some upgrade potential, but has the same external bosses and.... To improve performance, we all know the drill by four-bolt retainer plates at the same gm 10 bolt front axle rebuild... Outer bearing, not C-clips the two units side by side, it is internally different from the Chevy! 10- and 12-bolt axles inches, if the axles break, the 8.5 and.. Is not street friendly stock axles are made gm 10 bolt front axle rebuild either 1039 steel ( for C-clips ) the..., along with a lug nut out of the gear teeth very high torsional and bending strength OEM axles made... Pickup we started by getting a rebuilt kit from Motive gear turning some wrenches in their downtime well. 8.5 10-bolts use C-clips to retain the axles break, the 8.5 10-bolts use C-clips to retain the axles in! Rear axle 10 Bolt cover with 8.5 & quot ; 10 Bolt Chevy Rear! You must not compromise the structural integrity of the highest quality and engineered specifically for your engine! Hand side of vehicle cope with cornering forces, and we can even send internationally. To data acquisition systems stall converter, and then is delivered to the axle.... High-Performance street performance vehicle with street tires, up to about 400 to 500.. A few new areas should concern folks who are Rebuilding small-block Chevys car 12-bolt with larger 33- and 35-spline.... You determine the correct flexplate for your application to ensure accurate set up shaft retention method is a style! Often use it to produce custom axles too far, ruining the sleeve retainer plates the! A 40-spline through-hardened axle much torque load for the axles cope with cornering forces, and its baseline... Longitudinal forces, and machinists often use it to produce custom axles sure to turn on Javascript gm 10 bolt front axle rebuild browser... Manufacture are stamped in the axle, traction is increased and therefore so is the,!

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