Yukon Gear Positraction internals For 8.5in GM w/ 30 Spline Axles
Technical Data
GM 8.5 Spider Gear Set is the ultimate solution for restoring or upgrading positraction internals in GM 8.5" differentials with 30 spline axles. Yukon Gear engineered this Dura Grip spider gear set to deliver exact fitment, strength, and reliability for performance and everyday driving. Whether you’re building a street machine, towing, or off‑roading, this gear set ensures smooth operation and long‑lasting durability.
With the GM 8.5 Spider Gear Set, you get premium construction designed to withstand heavy use. Yukon Gear is trusted by mechanics and enthusiasts across America, making this set a dependable choice for anyone who values performance and peace of mind.
This GM 8.5 Spider Gear Set is built tough for easy installation and consistent results. Perfect for GM owners, it restores proper positraction function, reduces wear, and extends the life of your differential.
Features and Benefits
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Positraction Internals – Restores traction and performance in GM 8.5" differentials.
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30 Spline Compatibility – Designed specifically for axles with 30 splines.
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Durable Construction – Precision‑machined for strength and long service life.
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Trusted Brand – Yukon Gear is a leader in drivetrain solutions, known for reliability and performance.
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Improved Reliability – Ensures smooth operation and extends differential life.
Built for GM Performance
Upgrade your drivetrain with the GM 8.5 Spider Gear Set. Whether you’re restoring, commuting, or racing, this set ensures dependable performance every mile.
Specifications
| Specification | Detail |
|---|---|
| Part Number | yukYPKGM8.5-P-30 |
| Model Compatibility | GM 8.5" Differential |
| Brand | Yukon Gear |
| Kit Type | Dura Grip Spider Gear Set |
| Axle Spline Quantity | 30 |
| Grade Type | Regular |
| Package Quantity | EA (Each) |
| Warning (CA Prop 65) | Not Applicable |
Installation Instructions
Installation Instructions
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1980-1989 | Buick | Electra | Estate Wagon |
| 1980-1985 | Buick | Electra | Limited |
| 1980-1985 | Buick | Electra | Park Avenue |
| 1985 | Buick | Electra | T-Type |
| 2004-2007 | Buick | Rainier | CXL |
| 2004-2005 | Buick | Rainier | CXL Plus |
| 1980-1987 | Buick | Regal | Base |
| 1982-1983 | Buick | Regal | Estate Wagon |
| 1987 | Buick | Regal | GNX |
| 1984-1987 | Buick | Regal | Grand National |
| 1980-1987 | Buick | Regal | Limited |
| 1982 | Buick | Regal | Limited Turbo |
| 1980-1982 | Buick | Regal | Sport |
| 1983-1986 | Buick | Regal | T-Type |
| 1999-2000,2002-2013 | Cadillac | Escalade | Base |
| 2009-2013 | Cadillac | Escalade | Hybrid |
| 2010-2013 | Cadillac | Escalade | Hybrid Platinum |
| 2011-2013 | Cadillac | Escalade | Luxury |
| 2008-2013 | Cadillac | Escalade | Platinum |
| 2011-2013 | Cadillac | Escalade | Premium |
| 2013 | Chevrolet | Avalanche | Black Diamond LS |
| 2013 | Chevrolet | Avalanche | Black Diamond LT |
| 2013 | Chevrolet | Avalanche | Black Diamond LTZ |
| 2007-2012 | Chevrolet | Avalanche | LS |
| 2007-2012 | Chevrolet | Avalanche | LT |
| 2007-2012 | Chevrolet | Avalanche | LTZ |
| 2002-2005 | Chevrolet | Avalanche 1500 | Base |
| 2005-2006 | Chevrolet | Avalanche 1500 | LS |
| 2005-2006 | Chevrolet | Avalanche 1500 | LT |
| 2002-2003 | Chevrolet | Avalanche 1500 | North Face |
| 2002-2003 | Chevrolet | Avalanche 1500 | On Road Edition |
| 2003 | Chevrolet | Avalanche 1500 | WBH |
| 2004-2006 | Chevrolet | Avalanche 1500 | Z66 |
| 2002-2006 | Chevrolet | Avalanche 1500 | Z71 |
| 1994 | Chevrolet | Blazer | Base |
| 1992-1993 | Chevrolet | Blazer | Cheyenne |
| 1987 | Chevrolet | Blazer | Custom Deluxe |
| 1988-1991 | Chevrolet | Blazer | Scottsdale |
| 1987-1994 | Chevrolet | Blazer | Silverado |
| 1994 | Chevrolet | Blazer | Silverado Sport |
| 1980 | Chevrolet | C10 | Big Ten |
| 1980-1981 | Chevrolet | C10 | Cheyenne |
| 1981-1986 | Chevrolet | C10 | Custom |
| 1980 | Chevrolet | C10 | Custom Deluxe |
| 1981 | Chevrolet | C10 | Deluxe |
| 1980-1986 | Chevrolet | C10 | Scottsdale |
| 1980-1986 | Chevrolet | C10 | Silverado |
| 1981-1986 | Chevrolet | C10 Suburban | Custom |
| 1980 | Chevrolet | C10 Suburban | Custom Deluxe |
| 1981 | Chevrolet | C10 Suburban | Deluxe |
| 1980,1982,1984-1986 | Chevrolet | C10 Suburban | Scottsdale |
| 1980,1982-1986 | Chevrolet | C10 Suburban | Silverado |
| 1990-1993 | Chevrolet | C1500 | 454 SS |
| 1994-1997 | Chevrolet | C1500 | Base |
| 1988-1998 | Chevrolet | C1500 | Cheyenne |
| 1999 | Chevrolet | C1500 | LS |
| 1988-1992 | Chevrolet | C1500 | Scottsdale |
| 1988-1998 | Chevrolet | C1500 | Silverado |
| 1990-1998 | Chevrolet | C1500 | WT |
| 1992-1999 | Chevrolet | C1500 Suburban | Base |
| 1995-1999 | Chevrolet | C1500 Suburban | LS |
| 1995-1997,1999 | Chevrolet | C1500 Suburban | LT |
| 1992-1994 | Chevrolet | C1500 Suburban | Silverado |
| 1994-1997,1999-2000 | Chevrolet | C2500 | Base |
| 1989-1998 | Chevrolet | C2500 | Cheyenne |
| 1999-2000 | Chevrolet | C2500 | LS |
| 1989-1992 | Chevrolet | C2500 | Scottsdale |
| 1989-1998 | Chevrolet | C2500 | Silverado |
| 1994-1995,1998 | Chevrolet | C2500 | WT |
| 1980 | Chevrolet | Camaro | Base |
| 1980-1981 | Chevrolet | Camaro | Berlinetta |
| 1980 | Chevrolet | Camaro | Rally Sport |
| 1981 | Chevrolet | Camaro | Sport |
| 1980-1981 | Chevrolet | Camaro | Z28 |
| 1986-1992 | Chevrolet | Caprice | Base |
| 1980-1996 | Chevrolet | Caprice | Classic |
| 1986-1990 | Chevrolet | Caprice | Classic Brougham |
| 1981-1982 | Chevrolet | Caprice | Classic Estate |
| 1980-1981 | Chevrolet | Caprice | Classic Landau |
| 1993-1994 | Chevrolet | Caprice | Classic LS |
| 1987-1990 | Chevrolet | Caprice | Classic LS Brougham |
| 1991-1993 | Chevrolet | Caprice | Classic LTZ |
| 1980 | Chevrolet | Caprice | Classic Sport |
| 2004 | Chevrolet | Colorado | Base |
| 2004,2006-2008 | Chevrolet | Colorado | LS |
| 2006-2012 | Chevrolet | Colorado | LT |
| 2004-2005 | Chevrolet | Colorado | Sport |
| 2004-2005 | Chevrolet | Colorado | Sport LS |
| 2006-2012 | Chevrolet | Colorado | WT |
| 2004-2005 | Chevrolet | Colorado | Z71 |
| 2004-2005 | Chevrolet | Colorado | Z71 LS |
| 2004-2005 | Chevrolet | Colorado | Z85 |
| 2004-2005 | Chevrolet | Colorado | Z85 LS |
| 1996-2014 | Chevrolet | Express 1500 | Base |
| 1996-2014 | Chevrolet | Express 1500 | LS |
| 2001-2002,2006-2014 | Chevrolet | Express 1500 | LT |
| 1983 | Chevrolet | G10 | Base |
| 1980-1995 | Chevrolet | G10 | Beauville |
| 1981-1984,1986-1987 | Chevrolet | G10 | Bonaventure |
| 1980-1995 | Chevrolet | G10 | Chevy Van |
| 1980-1995 | Chevrolet | G10 | Sportvan |
| 1980-1995 | Chevrolet | G20 | Beauville |
| 1983-1984 | Chevrolet | G20 | Bonaventure |
| 1980-1995 | Chevrolet | G20 | Chevy Van |
| 1980-1981 | Chevrolet | G20 | Nomad |
| 1980-1995 | Chevrolet | G20 | Sportvan |
| 1980-1985 | Chevrolet | Impala | Base |
| 1981-1982 | Chevrolet | Impala | Estate |
| 1980 | Chevrolet | Impala | Sport |
| 1994-1996 | Chevrolet | Impala | SS |
| 1980-1981 | Chevrolet | K10 | Cheyenne |
| 1981-1986 | Chevrolet | K10 | Custom |
| 1980 | Chevrolet | K10 | Custom Deluxe |
| 1981 | Chevrolet | K10 | Deluxe |
| 1980-1986 | Chevrolet | K10 | Scottsdale |
| 1980-1986 | Chevrolet | K10 | Silverado |
| 1981-1986 | Chevrolet | K10 Suburban | Custom |
| 1980 | Chevrolet | K10 Suburban | Custom Deluxe |
| 1981 | Chevrolet | K10 Suburban | Deluxe |
| 1980,1982,1984-1986 | Chevrolet | K10 Suburban | Scottsdale |
| 1980,1982-1983,1985-1986 | Chevrolet | K10 Suburban | Silverado |
| 1994-1997 | Chevrolet | K1500 | Base |
| 1988-1998 | Chevrolet | K1500 | Cheyenne |
| 1999 | Chevrolet | K1500 | LS |
| 1988-1992 | Chevrolet | K1500 | Scottsdale |
| 1988-1998 | Chevrolet | K1500 | Silverado |
| 1991 | Chevrolet | K1500 | Sport |
| 1990-1998 | Chevrolet | K1500 | WT |
| 1992-1999 | Chevrolet | K1500 Suburban | Base |
| 1995-1999 | Chevrolet | K1500 Suburban | LS |
| 1995-1997,1999 | Chevrolet | K1500 Suburban | LT |
| 1992-1994 | Chevrolet | K1500 Suburban | Silverado |
| 1980-1981 | Chevrolet | K20 | Cheyenne |
| 1981-1986 | Chevrolet | K20 | Custom |
| 1980 | Chevrolet | K20 | Custom Deluxe |
| 1981 | Chevrolet | K20 | Deluxe |
| 1980-1986 | Chevrolet | K20 | Scottsdale |
| 1980-1983,1985-1986 | Chevrolet | K20 | Silverado |
| 1981-1986 | Chevrolet | K20 Suburban | Custom |
| 1980 | Chevrolet | K20 Suburban | Custom Deluxe |
| 1981 | Chevrolet | K20 Suburban | Deluxe |
| 1980,1982,1984-1986 | Chevrolet | K20 Suburban | Scottsdale |
| 1980,1982-1983,1985-1986 | Chevrolet | K20 Suburban | Silverado |
| 1980 | Chevrolet | K5 Blazer | Cheyenne |
| 1981-1986 | Chevrolet | K5 Blazer | Custom |
| 1980 | Chevrolet | K5 Blazer | Custom Deluxe |
| 1981 | Chevrolet | K5 Blazer | Deluxe |
| 1984 | Chevrolet | K5 Blazer | Scottsdale |
| 1980-1986 | Chevrolet | K5 Blazer | Silverado |
| 1980-1981 | Chevrolet | Malibu | Base |
| 1980-1983 | Chevrolet | Malibu | Classic |
| 1980 | Chevrolet | Malibu | Classic Estate |
| 1980-1981 | Chevrolet | Malibu | Classic Landau |
| 1980 | Chevrolet | Malibu | Classic Sport |
| 1980 | Chevrolet | Malibu | Estate |
| 1980 | Chevrolet | Malibu | Sport |
| 1987 | Chevrolet | R10 | Custom Deluxe |
| 1987 | Chevrolet | R10 | Scottsdale |
| 1987 | Chevrolet | R10 | Silverado |
| 1987 | Chevrolet | R10 Suburban | Custom Deluxe |
| 1987-1988 | Chevrolet | R10 Suburban | Scottsdale |
| 1987-1988 | Chevrolet | R10 Suburban | Silverado |
| 1989-1991 | Chevrolet | R1500 Suburban | Scottsdale |
| 1989-1991 | Chevrolet | R1500 Suburban | Silverado |
| 1994-2003 | Chevrolet | S10 | Base |
| 1994-2004 | Chevrolet | S10 | LS |
| 1994-1998 | Chevrolet | S10 | SS |
| 1999-2003 | Chevrolet | S10 | Xtreme |
| 1994-2003 | Chevrolet | S10 | ZR2 |
| 2002-2004 | Chevrolet | S10 | ZR5 |
| 1999-2005 | Chevrolet | Silverado 1500 | Base |
| 2016-2017 | Chevrolet | Silverado 1500 | Custom |
| 2014-2017 | Chevrolet | Silverado 1500 | High Country |
| 2004-2006,2009-2013 | Chevrolet | Silverado 1500 | Hybrid |
| 1999-2013,2015-2017 | Chevrolet | Silverado 1500 | LS |
| 1999-2017 | Chevrolet | Silverado 1500 | LT |
| 2007-2017 | Chevrolet | Silverado 1500 | LTZ |
| 2005-2006 | Chevrolet | Silverado 1500 | SS |
| 2015-2017 | Chevrolet | Silverado 1500 | SSV |
| 2002-2017 | Chevrolet | Silverado 1500 | WT |
| 2010-2013 | Chevrolet | Silverado 1500 | XFE |
| 2004-2005 | Chevrolet | Silverado 1500 | Z71 Off-Road |
| 2003-2006 | Chevrolet | SSR | Base |
| 2000-2001,2006 | Chevrolet | Suburban 1500 | Base |
| 2000-2014 | Chevrolet | Suburban 1500 | LS |
| 2000-2014 | Chevrolet | Suburban 1500 | LT |
| 2007-2014 | Chevrolet | Suburban 1500 | LTZ |
| 2002-2006 | Chevrolet | Suburban 1500 | Z71 |
| 1995-2001,2006 | Chevrolet | Tahoe | Base |
| 2008-2013 | Chevrolet | Tahoe | Hybrid |
| 2000 | Chevrolet | Tahoe | Limited |
| 1995-2017 | Chevrolet | Tahoe | LS |
| 1995-2017 | Chevrolet | Tahoe | LT |
| 2007-2016 | Chevrolet | Tahoe | LTZ |
| 2007-2017 | Chevrolet | Tahoe | PPV |
| 2017 | Chevrolet | Tahoe | Premier |
| 2012-2017 | Chevrolet | Tahoe | SSV |
| 2000,2002-2006 | Chevrolet | Tahoe | Z71 |
| 2008 | Chevrolet | Trailblazer | Base |
| 2002-2007 | Chevrolet | Trailblazer | LS |
REVIEWS
Installed this Yukon spider gear set in my GM 8.5. Fit was perfect and traction is back to normal.
James T.
Cleveland, OH
Great quality gears. Used them on my Chevy with a GM 8.5 diff and the positraction works flawlessly now.
Mike R.
Detroit, MI
Specifications
Fitment Data
• Engineered for precision compatibility with high-performance builds.
• Tested under extreme mechanical stress for guaranteed structural integrity.
Use the Riot Vehicle Finder to verify exact sub-model compatibility.
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