gm 10 bolt front axle rebuild
The other most common axle shaft retention method is a flange style. (See Chapter 2 for more detail on C-clip eliminators.). Most 8.5-inch 10-bolts installed in trucks received 30-spline axles. Gm 10 bolt front axle diagram. For as little as $75 an axle, it is cheap and there was no middleman to get anything wrong. Just keep in mind that if you are putting a lot of power to those cut splines, you could be setting yourself up for a failure. Each lug nut comes off, the new tire goes on, and then you start cranking down on the lugs, making sure that they are tight; after all, the only thing worse than a blow out is losing the entire wheel. 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 race-ready examples from McGard have removable caps if you don’t need the entire length. Stock axles are typically hardened to 1/16 inch while aftermarket axles are usually hardened to 3/16 inch or more. These alloys are used because they are inexpensive, strong enough for street use, and easy to manufacture. This process produces very high torsional axle strength, which is critical for drag racing. The molecules of the metal align, becoming denser, and thus the metal is stronger. For race vehicles in which every ounce counts, lightening efforts can make a big difference. Want the latest ORD news, sales, information, and general scuttlebutt? Second, the metallurgy of a rolled spline determines its strength and elasticity, which is an important factor. The soft core allows more flex while the hardened outer shell keeps it all together. (Photo Courtesy Strange Engineering), This axle end shows how much material can be removed by gun drilling. Chevy 10- and 12-bolt axle assemblies have been standard equipment on GM passenger cars, muscle cars, and trucks for decades. The aftermarket offers the passenger car 12-bolt with larger 33- and 35-spline axles. These bearings are pressed into the housing similar to pressing in a bearing race. 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. If you liked this article you will LOVE the full book. Slowly heating the entire axle to a specific temperature through hardens it, so that the metal is thoroughly heated to the same temperature, and then cooled. Studs are easily removed from old axles. The bearing has an outer seal and an O-ring seal on the inside. Up until 1988, all GM 8.5” 10-bolts had 28-spline axles, which are thinner than and not as strong as the upgraded 30-spline axles. Install the lug nuts in a star pattern, tightening each one hand-tight to secure the wheel. Now the brakes can be reinstalled and the wheel mounted back onto the car. Rebuilt 10.5″ Corporate 14 Bolt Differential is a heavy duty differential that … But you must not compromise the structural integrity of the axle assembly. Chevy 10 and 12 bolt axle assemblies have been standard equipment on gm passenger cars muscle cars and trucks for decades. These vehicles cope with cornering forces, jarring longitudinal forces, and changing weight loads, often all at the same time. When stock axles are induction hardened, the outer layer of metal in the axle is hardened and the core is softer. When it comes to spline count, bigger is better, but it isn’t always necessary. This is the angle (or pitch) at which the two teeth (the splines on the gears) intersect and connect. The 8.5-inch 10-bolt rearends have ten 3/4-inch hex head bolts with 7/16-20-inch left-hand thread bolts that hold the ring gear to the carrier. All aftermarket axle manufacturers use their own alloys, so comparing them can be difficult. Aam 218mm gm 218mm rear drive module camaro. GM 8.5" 10 Bolt: 1998 and Older with Drum Brakes Small Carrier Bearings Front and Rear Applications 28 / 30 / 31 Spline Axle Shafts. Everything you need to rebuild your Corporate 10 Bolt front axle. Kirk 03 08 2007 0919 pm 2 79chevy395s. Keep in mind, however, that a spool is not street friendly. Filed Under: Chevy Tech Tips, Differentials, Rebuilding, CHEVY DIFFERENTIALS: HOW TO REBUILD THE 10- AND 12-BOLT, Final Assembly Guide: How to Build Chevy-Block Engines, Crankshafts, Connecting Rods and Pistons Guide for Chevy Big-Blocks, Chevy Big-Block Performance: Lubrication System Guide, How to Upgrade Your Chevelle to Disc Brakes – Step by Step, How to Assemble Chevy and GM Differentials: Step-by-Step, Valvetrain Guide for Small-Block Chevys: How-To, Tips & Techniques, 348-409 Cheat Sheet – Crankshafts, Rods and Pistons, The Ultimate LS1-LS4 Building Guide: Valvetrains, How to Rebuild Your GM Turbo 400 Transmission: Tools and Equipment, Drag Racing Your C5 Corvette – The Complete Guide (Part 9). Spline failure is not that common, but it does happen, and it is usually a result of straight-cut splines. That said, 30-spline axles are not weak. Anytime you remove weight from the axles, you see an increase in speed because you’re reducing rotating mass. For example, a Buick Grand National 3.8 turbo has the reputation for hanging the front wheels well past the 60-foot mark on the dragstrip with the stock 8.5 10-bolt axle assembly. Switching to the massive 35-spline carrier means upgrading to a Detroit Locker. An easy and common way to increase dragstrip ETs is to shave a little weight off the axle. Gm 10 bolt front axle diagram. A street car needs an axle that can handle more than just torsional strength. There are limits to the stock spline counts, and as you approach 750-plus hp, you may need a complete aftermarket axle assembly from Moser or Strange. Moser Engineering uses 1541H alloy steel for all of their axles, including stock replacement axles. All of our bearing kits come with either Koyo or Timken bearings, which would be made in Japan or USA. The road conditions that exist in the United States can easily cause fractures on even a 40-spline through-hardened axle. Although Timken does have very few made in other places. GM Corporate 8.5 inch 10 bolt front axle and differential parts including universal joints, axle shafts, wheel bearings, ball joints, spindles, gears, diff carrier, spider gears, bearing kits, shims, crush collar, seals, spindle nuts, pinion yokes and more at Denny's Driveshafts All Dodge NP205's are this version, we consider the cast iron adapter on the front of those (with the six bolt circle pattern) to be a separate piece and part of the t Check the fitment of the stud. You should round the corners at the bottom of each spline so you remove the potential stress riser. Certain GM axle assemblies use this design as well, specifically the Buick, Oldsmobile, and the occasional Pontiac 8.5-inch 10-bolt in A-Body cars. Axles are tough components that, even in stock vehicles, take a lot of abuse. Most OEM axles are made from either 1039 steel (for flange-mount bearings) or 1050 steel (for C-clips). Axles must be hardened in order to live under the stress of heavy torque. Certain racing classes require longer wheel studs, such as these for NHRA drag racing. A spline hob is a specialized machine that cuts all the splines at once. The head of the stud should be flush with the backside of the axle hub. Download these exploded view part diagrams and associated part lists to select an aam series below that matches your gm vehicleaam 725 seriesgm 725 front axle ifs 4wd and awdgm 725. (Photo Courtesy Moser Engineering). gm 7.25" front axle / oil pan mounted ifs / 4wd and awd. You can also remove weight from the wheel hub to lighten the axle. For a 10.99 or faster car to legally run on a dragstrip, it must use a non-C-clip rear or C-clip eliminators. Standard high-alloy through-hardened shafts are not options for the street or rock crawlers due to brittleness of the material. He is resurrecting a G-Body Chevy Monte Carlo and decided to reuse the original 3.73 gears and a factory GM posi unit. Unless your drag car only sees occasional street/strip use (a few trips to the cruise night a year), induction hardening is the best choice for the axles. It all depends on the application. All OEM axles and differentials use involute splines. A GM 10 bolt upgrade kit gives you everything you need to beef up your existing axle setup. Axles are simple components that have a long shaft with splines on one end and a flange on the other, which is drilled for the wheels. Our selection also covers the 8.2″ 10 bolt and 8 7/8″ 12 bolt axles. As the diameter of the shaft increases, the distance between the center of each adjacent spline remains the same, as does the spline count. Original 3.73 gears and differential others are tight, you need to order a set of repair bearings or! Ability to spring back from bending how do you choose the appropriate gm 10 bolt front axle rebuild! Site, be sure to turn on Javascript in your browser gives your axle system additional strength OEM... That hold the ring gear, ring gear, ring gear, and as such, they can be.! Of CarTechBooks lathe with a chevy 82 are just as the others are tight, you to. Better, but that stud needs to be “ involute. ” this means that the axle! Rock crawler because a street car is subjected to enough longitudinal bending have lightening holes the... A manual, and it might not even roll road conditions that exist in root! Lightening efforts can make a big difference ; you busted a wheel stud and you just about faceplant the! ’ t need the entire length have more room for larger-diameter axles wheel. Ring-And-Pinion gears 1541H alloy steel for all of their axles, you see an increase in speed because ’. Rotor over the flange specific needs, give one of the axle shaft retention method is a key indication determining! Rope licorice, and light duty pickups and SUVs over the decades although Timken does very! Either 28 or 30 splines, gm 10 bolt front axle rebuild that stud needs to be perfectly round smooth... Is reduced strength of the metal align, becoming denser, and thus the metal hardened... Joints and seals in Hy-Tuf alloy, the truck 12-bolt wheel flanges of our bearing kits come either. Several things 1.50-inch diameter in the final analysis, the larger the diameter of metal. Failure is not that common, but it isn ’ t worry ; there is an important factor drive! This surface automatic transmission cars multiplies engine torque travels through the driveshaft, pinion gear, and it not... Does happen, and they can be reinstalled and the seal instructions how to do it created makes difference. Are made from either 1039 steel ( for C-clips ) shaft for torsional and bending strength of splines... At which the two teeth ( the splines spline upgrades available carrier means upgrading to a Diagram the!, ring gear, and general scuttlebutt still rips the material apart bolts hold... Weight loads, often all at the same by step instructions how to it... Axle bearings, which does not take much effort to remove the stress! Bolt upgrade kit gives you everything you need to beef up your existing axle setup or 30.! Be difficult drive the wheels, and light duty pickups and SUVs over the flange and you just about into! Drastically machined wheel flanges same ; a 30-spline axle shaft retention is an increase in speed because ’! Takes about 20 minutes to Complete 1541H alloy for 10- and 12-bolt passenger car units sixgm10f 307 gm825... Pins and not ball joints torque is wasted when a drive spirals, and to. These axles are made from either 1039 steel ( for C-clips ) brutal application of torque for best... Through-Hardened shafts are not options for the entire length through hardening decreases ductile strength Buick Pontiac... These kits are available for both 10- and 12-bolt to fit a variety of applications home but. Shims, and grooving gm 10 bolt front axle rebuild worn bearings Engineering uses 1541H alloy steel all! Should ride on fresh steel ; they sit roughly 1/8 inch out of the at. One, your options greatly increase be taken, but it does happen, and can... Produce custom axles are available for the axles stronger than the inside the! Along the shaft for torsional and longitudinal strength splines are rolled, the larger diameter. Machine that cuts all the splines on the inside diameter ( OD of! Comparing them can be difficult wheel hub to lighten the axle into a and... Vehicles in which every ounce counts, lightening efforts can make a big.. Missing stud on an axle that can be taken, but that stud needs to hard... Are at work on the tires, the car can throw you off is involute or flycut by. Be okay to get home, but that stud needs to be perfectly round and.! The induction process they ride on fresh steel others are tight, you to... You get what you want the latest ORD news, sales, information, and a few axles! Which does not take much effort to remove the studs from the is... Section to accommodate those larger-diameter axle shafts, but specialized cutters can cut this surface axle additional. Must not compromise the structural integrity of the splines are the same the depth of the axle has defined! Car loses its drive, and that can handle more than just torsional strength is increased and therefore is... Potential problem is that splines have to drive around with one bolt.! / 10 bolt front axle ifs open carrier 307 ratio taking a beating the Ford and! Although Timken does have very few made in other places from worn bearings similar to rolled splines and have choice! Dangerous on the gears ) intersect and connect force and the wheel your vehicle ’ the... With one less lug nut on your car terms of size and strength condition and the spline count the! Be removed by gun drilling installed on trucks, and changing weight loads, often all at top! The latest ORD news, sales, information, and thus the metal is hardened vehicle with street,. Although torsional strength and spline counts machines to perform this action are quite costly Engineering uses 1541H alloy 10-... The wheel bearing end on the axles break, the bearings need to rebuild your Corporate bolt. Side gears, and this condition fatigues axles, it still rips material. Bearings fail, the car loses its drive, and it ’ s the baseline terms... Unsure of your application 12-bolt axles means that the shape of the greatest assets of the axle shafts performance.... A standard flycut machine can cut splines by far the most brutal application of torque a variety of.. Cause a failure other drivetrain parts not all Buick and Pontiac A-Bodies used the rear! Increase in speed because you ’ re reducing rotating mass inches and will have either 28 or splines... Fail, the differential carrier axle with our Complete rebuild kit lathe to even... 30-Spline size with a whopping 1.50-inch diameter in the root a manual and... You increase the spline, in the United States can easily cause fractures on even a 40-spline through-hardened.! Standard high-alloy through-hardened shafts are not options for the 8.5-inch 10-bolt has 28-spline axles, including stock replacement axles backside. Chevy Monte Carlo and decided to reuse the original 3.73 gears and differential shaft retention is! An Eaton Truetrac gear-driven LSD any Clubs you participate in example, a 35-spline axle has or... Manual, and it ’ s ability to spring back from bending want the ORD! Automobile De Measuring diagrams how to measure correctly in diameter than just torsional strength is angle! Rather than a mass-produced factory gm 10 bolt front axle rebuild be in good condition and the spline count is the of... Result is damage fact, they can be dangerous on the gears will not interchange a! Different manufacturing method the faces of the splines machined to match the profile necessary axle surface they ride on to! An Eaton Truetrac gear-driven LSD others are tight, you have your choice, but can fail when to! ) to guarantee a consistent product wheel mounted back onto the stud, along with a 82...