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  See more parts for Buick Apollo
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Yukon Gear & Axle Yukon Positraction Internals for 8.5 Inch GM 28 Spline Axles - YPKGM8.5-P-28

If you’re diving into a rebuild or just need to swap out those worn-out spider gears, the Yukon Gear & Axle spider gear kit is your go-to. These kits are built tough, using top-notch materials and solid production techniques that really make a difference in longevity. Trust me, you want something that can handle the grind without giving up on you.

This kit is specifically designed for GM 8.5” differentials equipped with Dura Grip positraction. You’ll get everything you need for a complete replacement—no hunting around for extra parts. It includes two side gears, two pinion gears, a cross pin shaft, a roll pin, and even the thrust washers for the spider gears. Just a heads up, it doesn’t come with clutches, so keep that in mind when you’re planning your install.

Features:

  • Fits GM 8.5" differential with Dura Grip positraction
  • 28 spline axles
  • Complete with two side gears, two pinion gears, cross pin shaft, roll pin, and thrust washers
  • Clutches not included

Specifications:

  • Grade Type: Regular

Now, let’s talk fitment. This kit is compatible with a whole bunch of classic rides, from the Buick Apollo to the Pontiac GTO. Here’s a quick rundown of what it fits:

  • Buick Apollo (1973-1975)
  • Buick Electra (1971-1989)
  • Buick Regal (1973-1987)
  • Chevrolet Camaro (1970-1981)
  • Chevrolet Caprice (1970-1996)
  • GMC Jimmy (1977-1989)
  • Oldsmobile Cutlass (1970-1977)
  • Pontiac Firebird (1970-1981)

So, if you're looking to keep your ride running smooth and reliable, this spider gear kit is a solid choice. It’s got the durability and the right fit for a range of classic GM models, so you can hit the road with confidence.

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
1973-1975
 Buick Apollo
1971-1989
 Buick Electra
1973-1987
 Buick Regal
1975-1978
 Buick Riviera
1970-1972, 1975-1979
 Buick Skylark
1970-1975
 Chevrolet Bel Air
1987-1989
 Chevrolet Blazer
1977-1986
 Chevrolet C/K 10
1988-1989
 Chevrolet C/K 1500
1978-1986
 Chevrolet C/K 20
1970-1981
 Chevrolet Camaro
1970-1996
 Chevrolet Caprice
1973
 Chevrolet Chevelle
1971-1976
 Chevrolet El Camino
1979-1988
 Chevrolet G10
1978-1989
 Chevrolet G20
1971-1985
 Chevrolet Impala
1977-1986
 Chevrolet K5 Blazer
1973-1983
 Chevrolet Malibu
1973-1978
 Chevrolet Monte Carlo
1970-1979
 Chevrolet Nova
1987
 Chevrolet R/V 10
1987
 Chevrolet R/V 20
1977-1989
 Chevrolet Suburban
1977-1978
 GMC C/K 15
1979-1986, 1988
 GMC C/K 1500
1978
 GMC C/K 25
1979-1986
 GMC C/K 2500
1983-1988
 GMC G1500
1983-1988
 GMC G2500
1977-1989
 GMC Jimmy
1987
 GMC R1500
1994-1998
 GMC Sonoma
1987
 GMC V1500
1988-1989
 GMC V1500 Suburban
1987
 GMC V2500
1988-1989
 GMC V2500 Suburban
1970-1977
 Oldsmobile Cutlass
1985-1987
 Oldsmobile Cutlass Supreme
1973-1979
 Oldsmobile Omega
1970-1986
 Pontiac Bonneville
1970-1981
 Pontiac Firebird
1970-1973
 Pontiac GTO
1973-1974
 Pontiac Grand Prix
Yukon's mission is to build quality parts that exceed your expectations. We achieve this through state-of-the-art product design and an in-house engineering team. Our parts are then produced by leaders in OEM manufacturing and endure rigorous testing.
Yukon Gear & Axle ("Yukon") warrants the original retail purchaser that all Yukon products will be free from defects in materials and workmanship for the periods shown herein. Yukon makes no other warranty of any kind, express or implied. All other warranties, including but not limited to an implied warranty of merchantability or fitness for a particular purpose, are excluded. This warranty is offered provided that the Yukon product has been installed and maintained in accordance with Yukon instructions, and that it has not been subject to modification, accident, abnormal use or misuse. At Yukon's discretion, this warranty may be voided if installation of Yukon product(s) occurs on vehicles with tires that exceed Yukon Maximum Recommended Tire Size.

Upon notification of a warranty claim, Yukon shall investigate the claim of defect, and, in the event of a verified defect, shall, at their sole choice, either repair the defective product, replace it, or refund the purchase price.

This warranty does not cover, and Yukon shall not be liable for, incidental or consequential damages, including loss of time, road service charges, labor charges, inconvenience, loss of vehicle use, loss of revenues, or loss or damage to personal property (including loss or damage to vehicle parts due to the failure of the Yukon product)*. In addition, this warranty does not cover, and Yukon shall not be liable for, any undertaking, representation, or agreements made by dealers or other third parties selling Yukon Gear & Axle products, except where such agreements are within the provisions of this Warranty statement. Also, this warranty does not cover damage to the axle caused by or facilitated by failure of a non-Yukon component.

This agreement offers you specific legal rights. You may also have other rights which vary from state to state.

YUKON WARRANTY BY PRODUCT

Spool
  • Length:As long as original purchaser owns vehicle in which Spool is originally installed
  • Notes:It is normal for Spools to cause tire chatter, squeal, or scrubbing when vehicle is not moving in a straight line. Both rear tires must measure the same height from ground to top of wheel for Spool to function properly without premature wear.
Super Joint
  • Length:As long as original purchaser owns vehicle in which Super Joint is originally installed
  • Notes:Warranty coverage is for breakage of cross section or caps only. Failure by wear or galling is not covered.
YP - Series Products (other than Spool and Super Joint)
  • Length:One (1) Year
  • Notes:Covers parts for one year against manufacturers defects.
Front Axle (1541H)
  • Length:Ten (10) Years
  • Notes:Covers parts for ten years against manufacturing defects.
Rear Axle (1541H)
  • Length:Ten (10) Years
  • Notes:Covers parts for ten years against manufacturing defects.
Rear Axle 4340 (YA W)
  • Length:Limited Lifetime
  • Notes:Limited Lifetime warranty covering manufacturing defects and axle breakage for as long as you own the vehicle. This warranty is not transferable to another party. "No Questions Asked" replacement for first warranty return, however, Yukon reserves the right to either replace axle or refund original purchase price after the first warranty claim. Yukon (through RANDYS Worldwide Automotive) makes final determination on warranty considerations.
Front Axle (Series YA W)
  • Length:Limited Lifetime
  • Notes:Limited Lifetime warranty covering manufacturing defects and axle breakage for as long as you own the vehicle. This warranty is not transferable to another party. "No Questions Asked" replacement for first warranty return, however, Yukon reserves the right to either replace axle or refund original purchase price after the first warranty claim. Yukon (through RANDYS Worldwide Automotive) makes final determination on warranty considerations.
Ring & Pinion Gear Set
  • Length:One (1) Year
  • Notes:Warrantied against manufacturing defects for one (1) year.
Positraction Differential
  • Length:One (1) Year
  • Notes:Exclusions apply, does not cover premature clutch wear or abuse. It is normal for Positraction differentials to cause tire chatter, squeal, or scrubbing when vehicle is not moving in a straight line. Both rear tires must measure the same height from ground to top of wheel for differential to function properly without premature wear. Limited slip additive or appropriate friction modifier must be used with oil to reduce Positraction chatter.
Zip Locker (YZL)
  • Length:Six (6) Years
  • Notes:All Zip Lockers come with a six (6) year warranty against manufacturer defect, including any collaterally damaged parts and associated labor, up to $2,000*, for the first two (2) years. Collaterally damaged parts must be submitted for inspection. Receipts for parts and associated labor must be submitted as well. Only claims deemed reasonable by Yukon Gear & Axle will be accepted. Offer may be discontinued without advance notice.
Grizzly Locker (YGL)
  • Length:One (1) Year
  • Notes:Covers the replacement of the unit and any collaterally damaged parts and associated labor, up to $2,000. Collaterally damaged parts must be submitted for inspection. Receipts for parts and associated labor must be submitted as well. Only claims deemed reasonable by Yukon Gear & Axle will be accepted. Offer may be discontinued without advance notice.
Yokes
  • Length:One (1) Year
  • Notes:Covers parts for one year against manufacturing defects.
Carriers (YC)
  • Length:One (1) Year
  • Notes:Covers parts for one year against manufacturing defects.
Tools (YT)
  • Length:One (1) Year
  • Notes:Covers parts for one year against manufacturing defects.
Install Kits
  • Length:One (1) Year
  • Notes:Includes BK, MK, PK, and YK. Covers parts for one year against manufacturing defects.
Spider Gear Kits (YPK)
  • Length:One (1) Year
  • Notes:One year against manufacturing defects. Exclusions apply, does not cover clutch wear in limited slip differentials.
YHC Drive Flanges
  • Length:Limited Lifetime
  • Notes:Limited Lifetime warranty covering manufacturing defects and breakage for as long as you own the vehicle. This warranty is not transferable to another party. "No Questions Asked" replacement for first warranty return, however, Yukon reserves the right to either replace the part or refund original purchase price after the first warranty claim. Yukon (through RANDYS Worldwide Automotive) makes final determination on warranty considerations.
Yukon Hardcore Locking Hubs
  • Length:Limited Lifetime
  • Notes:Limited Lifetime warranty covering manufacturing defects and breakage for as long as you own the vehicle. This warranty is not transferable to another party. "No Questions Asked" replacement for first warranty return, however, Yukon reserves the right to either replace the part or refund original purchase price after the first warranty claim. Yukon (through RANDYS Worldwide Automotive) makes final determination on warranty considerations
Driveshafts
  • Length:One (1) Year
  • Notes:Warrantied against manufacturing defects for one (1) year. Longer warranty is available through purchase of a Y.E.S. plan.

Installation Instructions

Click to view the Installation Instructions here

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