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  See more parts for Buick Apollo
Select the year of your Buick Apollo:
Yukon Gear & Axle Yukon Grizzly Locker for GM 8.5" 8.6" 30 Spline 2.73 and Up - YGLGM8.5-3-30

If you're serious about off-roading or just want to beef up your ride, the Yukon Grizzly Locker is a no-brainer. This isn’t just another part you slap on your vehicle; it’s a rugged, mechanical positive-locking differential that’s built to handle the toughest terrains. Whether you're rock crawling, tearing up trails, or even hitting the drag strip, this locker gives you 100% power to both tires when you need it most, while still letting you turn without feeling like you're in a wrestling match with your steering wheel.

What sets the Grizzly apart? For starters, it features a patented internal design that’s engineered to be tougher than your average locker. The inner clutch teeth have a larger radius at the base, which means they can handle up to 350% more stress compared to those back-cut designs. That’s a big deal when you’re pushing your vehicle to its limits. Plus, the larger teeth help resist breakage from shock-loading or catastrophic axle failures. This thing is built for serious driving conditions, so you can hit the trails with confidence.

  • Fits: GM 8.5" and 8.6" with 30 spline axles
  • Ratios: 2.73 and up only
  • Material: Made from tough 8620 steel for added strength
  • Assembly: Proudly assembled in the USA

When it comes to specs, here’s what you need to know:

  • Axle Shaft Spline Quantity: 30
  • Cover Bolt Quantity: 10
  • Type: Locking

This locker is compatible with a wide range of vehicles, including:

  • Buick Apollo (1973-1975)
  • Chevrolet Silverado 1500 (1999-2017)
  • GMC Sierra (1999-2017)
  • Cadillac Escalade (1999-2000 & 2002-2013)
  • Oldsmobile Cutlass (1970-1977)
  • And many more!

So if you’re looking to enhance your off-road capabilities and want something that’s built to last, the Yukon Grizzly Locker is definitely worth considering. It’s a solid investment for anyone who takes their driving seriously.

Proposition 65

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

Vehicle
1973-1975
 Buick Apollo
1971-1989
 Buick Electra
2004-2007
 Buick Rainier
1973-1987
 Buick Regal
1975-1978
 Buick Riviera
1970-1972, 1975-1979
 Buick Skylark
1999-2000, 2002-2013
 Cadillac Escalade
2007-2013
 Chevrolet Avalanche
2002-2006
 Chevrolet Avalanche 1500
2002-2006
 Chevrolet Avalanche 2500
1970-1975
 Chevrolet Bel Air
1987-1994
 Chevrolet Blazer
1977-1986
 Chevrolet C/K 10
1988-1999
 Chevrolet C/K 1500
1977-1986
 Chevrolet C/K 20
1989-2000
 Chevrolet C/K 2500
1994-1999
 Chevrolet C1500
1970-1981
 Chevrolet Camaro
1970-1996
 Chevrolet Caprice
1973
 Chevrolet Chevelle
2004-2012
 Chevrolet Colorado
1971-1976
 Chevrolet El Camino
1996-2014
 Chevrolet Express
1979-1988
 Chevrolet G10
1978-1995
 Chevrolet G20
1971-1985, 1994-1996
 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
1994-2004
 Chevrolet S10
2003-2006
 Chevrolet SSR
1999-2017
 Chevrolet Silverado 1500
1977-2014
 Chevrolet Suburban
1995-2017
 Chevrolet Tahoe
2002-2009
 Chevrolet TrailBlazer
1977-1978
 GMC C/K 15
1979-1986, 1988-1999
 GMC C/K 1500
1977-1978
 GMC C/K 25
1979-1986, 1997-2000
 GMC C/K 2500
2004-2012
 GMC Canyon
2002-2009
 GMC Envoy
1983-1995
 GMC G1500
1983-1995
 GMC G2500
1987
 GMC R1500
1996-2014
 GMC Savana
1999-2017
 GMC Sierra
1994-2004
 GMC Sonoma
1992-1993
 GMC Typhoon
1987
 GMC V1500
1988-1991
 GMC V1500 Suburban
1987
 GMC V2500
1988-1991
 GMC V2500 Suburban
1992-2013
 GMC Yukon
2000-2014
 GMC Yukon XL
2006-2010
 Hummer H3
2009-2010
 Hummer H3T
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
2005-2009
 Saab 9-7x
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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