It first appeared in 1970 production cars as a corporate replacement for the 8.2-inch 10-bolt rearend. Check the fitment of the stud. GM 7.25" FRONT AXLE / IFS / 4WD and AWD
ARB Air Locker $1,250.00. This means that you can bolt a set of drag slicks to an otherwise stock 8.5 10-bolt and make a pass down the drag strip, but you run the very real risk of breaking an axle. One other option for all three differentials is available: a spool. 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 TWO ICONIC PARTS BRANDS IN ONE PLACE. 1981 GMC K15 Pickup DIFF BEARING AND SEAL REBUILD KIT. C-clips are located past the splines on the axle in the center of the differential, so there is nothing keeping the axle inside the tube at the end of the housing. On this episode of Dirt Every Day Extra, Fred Williams and Dave Chappelle ask Offroad Designs Stephen Watson for some insight on these solid front axles and discuss which one you really want.https://www.motortrendondemand.com/subscribe/freetrial/?bnr=organic:bnr:yt:dede:ep233_fr_de:link:na:mtod 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. That being said, limited gear sets are offered for the carriers, especially if you plan to change gear ratios. Ductile strength is the metals ability to spring back from bending. How To Rebuild a GM 10 Bolt Chevy 8.5 Rear End. GM 8.6" REAR AXLE / 10 BOLT
The oval-shaped cover measures 8 5/16 inches by 10 9/16 inches. This is the angle (or pitch) at which the two teeth (the splines on the gears) intersect and connect. The method of axle shaft retention is an important consideration. It is a key indication for determining how the splines were created. Tinman 2 Kustoms shows how to rebuild a 10 bolt Chevy 8.5 rear axle in the bagged C10 using Yukon Gear & Axle components. There are a couple of potential strength issues with cut splines. The easiest way to tell the difference is by looking at the brakes. 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. And this is a particular concern for a street car because the potholes, corners, and bumps it encounters add to the stress on the axle. Diagram Number: 39. Depending on your budget and power needs there are many ways to reach your goal. The hobbing process yields an accurate involute spline, and when done before the shaft is hardened is just about as accurate as a rolled spline. GM 7.6" REAR AXLE / 10 BOLT, AAM 800 Series
Most 8.5-inch 10-bolts installed in trucks received 30-spline axles. 1983 Chevy K10 Pickup Your Price: $268.10 Yukon master overhaul kits include everything you need to rebuild your differential, install new ring and pinion gears or add a differential locker. Keep in mind, however, that a spool is not street friendly. The splines are said to be involute. This means that the faces of the teeth are slightly curved. How deep the axle is hardened is key to its function. This is achieved by heating up the axle quickly, typically by running it through a heating coil then quenching it in oil or water. Most OEM axles are made from either 1039 steel (for flange-mount bearings) or 1050 steel (for C-clips). Installing the new studs can be done several ways, depending on the tools you have available and whether the axle is in the housing. It is internally different from the 8.2 Chevy, but has the same external bosses and brackets. 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 . Designed Specifically For Drag Racing. 1981 GMC K25 Pickup 1986 GMC K15 Pickup 1987 Chevy K10 Pickup 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. Sign up for our newsletter! 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. Speedway also offers the Economy Ring & Pinion Setup Tool we needed. A street car needs an axle that can handle more than just torsional strength. On the end of each CV axle is a CV . The wheel bearing end on the housing holds two components: the bearing and the seal.
1985 Chevy K10 Pickup They do not sit flush with the housing; they sit roughly 1/8 inch out of the housing. Dont stress too much; it happens. 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. Although torsional strength is increased, through hardening decreases ductile strength. That is theimpetus for why we decided to put this swap meet/junkyard identification guide together. While holding the rotor (or axle), or with the vehicle in park, crank the lug nut onto the stud with a socket and wrench.
An airplanes fuselage can flex ever so slightly and not fracture, and you want some of the same characteristics for a street axle. TruTrac Limited Slip call for price. These Strange axles have lightening holes in the wheel flange. That being said, it isnot recommended for use behind engines that make a serious amount ofhorsepower. 1982 GMC K15 Pickup A number of weight-saving measures can be taken, but you must consider the safety and performance ramifications. The entire process typically takes about 20 minutes to complete. Insert the new stud from the back of the flange, then install the brake rotor over the flange. The 8.5-inch 10-bolt also shares the same pinion shaft diameter as the more expensive 12-bolt. Spline failure is not that common, but it does happen, and it is usually a result of straight-cut splines. Inside, the ring-gear bolts are the same as the 8.5 corporate unit, but the pinion-shaft diameter measures 1.438 inches. Furthermore, because upgrade kits feature larger-diameter shafts, you can haul and tow heavier loads . 1986 Chevy K10 Pickup 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. Every component is of the highest quality and engineered specifically for your application to ensure accurate set up. He is resurrecting a G-Body Chevy Monte Carlo and decided to reuse the original 3.73 gears and a factory GM posi unit. Timken brand. Factory axles are typically necked-down several inches from the end while aftermarket axles remain at their full diameter right up to the start of the splined area. With the flange retainer, four bolts and a plate keep the outer wheel bearing in the housing, and this retains the axle shaft inside the tube. I use the GM special. Not Available At This Time. The bearing is moved about 1 inch from the inside to the outside of the axle where it should ride on fresh steel. Although the 7.5-inch 10-bolt closely resembles the 8.5-inch housing, you can positively identify the Chevy7.5-inchrearend by measuring it. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles. Unfortunately, unless you have the two units side by side, it is nearly impossible to tell them apart. GM 7.6" FRONT AXLE / IFS
It was used in different models by all GM divisions with the exception of Cadillac. An 8.2 (shown) will have the same contour as the cover. I also like to put some oil on the seal surface of the yoke to avoid tearing the new pinion seal. Chrome Differential Covers. The Ford 9-inch and a few differentials use flange axle tubes. Optional Upgrade to Solid Pinion Spacer. The other potential problem is that splines have to mesh with an involute spline in the differential side gears. GM 8.25" FRONT AXLE / IFS 900, AAM 860 Series
You can choose to rebuild the engine yourself, find a reputable machine shop to do [Click here to read more], Since the first edition of this book, we have suffered the inevitable ravages of inflation. 1978 GMC K15 Pickup Add On Options. Even though the big-block was destined to eventually find a home in trucks and family sedans, it started off as a serious . Other loads are at work on the axles as well. Wheel studs fail and its not uncommon when you are running a muscle car. Too much torque load for the axles results in a rotational fracture and axle failure. But, did you know there is more than one style of 10-bolt rearend? Part Number: B4200-K4. GM 8.5" 10 Bolt 10 bolt cover with 8.5" ring gear. Includes both bearings, both races and the hub seal for one side. GM Dana 44 and Corporate 10 Bolt Spindle Seal and Bearing Kit, All Years. An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut. All OEM axles and differentials use involute splines. 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.
Most 8.2 factory covers also have the strangeprotrusionat the top. Stack a few washers onto the stud, along with a lug nut. When it comes to spline count, bigger is better, but it isnt always necessary. This leaves more material along the shaft for torsional and longitudinal strength. If you liked this article you will LOVE the full book. 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. In the 1950s, Corvettes were difficult to beat in stoplight races. 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. GM 8.5" 10 Bolt Gear & Posi Package Description Package Includes: (1) Limited Slip Positraction Carrier (Choose Spline Count Above)(1) Ring and Pinion Gear Set (Choose Ratio Above)(1) Differential Master Install Kit - Our Rigid Axle Eaton style limited-slip positraction unit uses carbon fiber and steel friction p (Photo Courtesy Strange Engineering). 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. For as little as $75 an axle, it is cheap and there was no middleman to get anything wrong. We will safeguard your e-mail and only send content you request. 1980 Chevy K10 Pickup Changing your tires profile, be it width, height, or both, can provide increased traction, braking, and handling. Next we disassembled everything, starting with the cross pin bolt, cross pin and C clips. Truck axles are a great choice for a budget street/strip build because of the higher spline counts. GM Corporate 10 Bolt Front Axle Complete Rebuild Kit . Talk to the experts. GM 11.5" REAR AXLE / 14 BOLT, GM 7.25" FRONT AXLE / Oil Pan Mounted IFS / 4WD and AWD, GM 9.76" REAR AXLE / SALISBURY / 12 BOLT. Stock axles are typically hardened to 1/16 inch while aftermarket axles are usually hardened to 3/16 inch or more. Per Side, Two Kits Required Per Truck. Maintaining your car's paint finish is essential to keep it looking great. You will also notice the large, flat, cast-in protrusions at thefive andseven oclock positions. Most aftermarket axle manufacturers offer lightened axles. How to eliminate unwanted to holes in your car's body, trunk, floor, or firewall with easy to use patch plugs from Speedway Motors. Before disassembly, we marked the bearing caps and kept the side bearing shims on the correct side. Anytime you are unsure of your applications specific needs, give one of the manufacturers a call. Typically, 10-bolt differentials are specific to a series of gears. Determining the correct flexplate for your V8 Mopar-powered project takes a little understanding of how these engines were balanced. Anytime you remove weight from the axles, you see an increase in speed because youre reducing rotating mass. 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. The 8.5-inch 10-bolt rearend is hugely popular because aftermarket carriers and gears are easily interchangeable. . This seats the stud to the flange and you are ready to mount a wheel. Yeah, you really did it this time; you busted a wheel stud. The axle shafts are also held in place by four-bolt retainer plates at the outer bearing, not C-clips. In fact, they can be dangerous on the street. It also uses a 10 5/8-inch irregular-shaped cover. GM Dana 44 and Corporate 10 Bolt Spindle Seal and Bearing Kit, All Years. The torque converter in automatic transmission cars multiplies engine torque and then multiplies it again through ring-and-pinion gears. Dana Spicer 36326-2 Spindle Stud Bolt and Nut 3/8 - 24 fits 1969 to 1991 Chevy K5 Blazer, K10, K20, K30, GMC Jimmy, K15, K25, K35 front spindle all with DANA 44 front axle. 1980 Chevy K20 Pickup Want the latest ORD news, sales, information, and general scuttlebutt? There are weight limits for drilled axles, so check with your manufacturer to ensure that your decision is a safe one. Dump the clutch for a manual, and the shock is even bigger. Two kits required per axle. Many times when you are rebuilding an existing rear end you want to save the original pinion bearing shim and re use it under the new bearing. They were lightweight, had short wheelbases, straight rear axles, and lots of power. One intimidating part for a lot of guys is the rear end. Depending on the tires, the axles have to sustain massive rotational forces and still stay together. Front Hub Assembly. (It happens more often that you think.) 1987 Chevy K20 Pickup Rolling: The metal is forced into a set of rolling dies under extreme pressure, which changes the crystal structure of the metal itself. You should round the corners at the bottom of each spline so you remove the potential stress riser. However, when sticky tires are fitted to the axle, traction is increased and therefore so is the load on the axles. GM 195mm REAR DRIVEMODULE - CAMARO, AAM 250mm
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. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. The spline count is the number of splines on the axle shaft. Chevy Hardcore NEWSLETTER - SIGN UP FREE! However, comparing those to OEM axles is simple enough. This is one of the greatest assets of the Ford 9-inch. 1980 GMC K15 Pickup Speedway also offers the Economy Ring & Pinion Setup Tool we needed. Lightweight cars, such as street rods and fiberglass-bodied dragsters, dont put as much stress on the axles as a full-size 1970 Buick GS, which tips the scales at 4,000 pounds. Fits Strange Medium Duty & Heavy Duty Front Brake Kits *. - Dirt Every Day Extra MotorTrend Channel 6.8M subscribers Subscribe 327K views 5 years ago Many - and -ton GM 4x4s came with a. DT Components DRK-321MK . But the situation is the same. Moser Engineering uses 1541H alloy steel for all of their axles, including stock replacement axles. This allows you to put the pinion gear in, set the pinion bearing pre-load, set the backlash and then run a contact pattern without the chance of compressing the crush sleeve too much. Most axles are either 45 or 30 degrees. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! Only a few stock axles are offered for the Chevy 10- and 12-bolt. 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. 1983 Chevy K20 Pickup 18 Steel Discs, GM 8.2 10 Bolt/8.875 12 Bolt, Kit. GM 8.6" Yukon Master Overhaul Kit | '09 and Newer Filed Under: Chevy Tech Tips, Differentials, Rebuilding, A few new areas should concern folks who are rebuilding small-block Chevys. GM 8.0" REAR AXLE / 10 BOLT, AAM 825 Series
Installing machine-cut splines on an involute side gear is possible, but there will be some potential strength loss, as much as 30 percent. On a single page you may see several cam specs given, and many [Click here to read more], Cylinder Numbers andFiring Order