Lock Right Locker

Powertrax® Lock-Right performance lockers’ straight-line performance is equal to a solid spool axle, yet they automatically unlock during turns. When extreme traction output and high-strength are required, racers, hot-rodders and muscle car owners chose Lock-Right lockers!
Best suited for extreme off-road to severe on-road use, Powertrax lockers replace the spider gears in your differential carrier without affecting your ring and pinion settings. The whole job can be done in your driveway with common hand tools in a couple of hours. A carrier is not included.

  • Brute Force Devices For Rugged Applications
  • Replacement Of Differential Case Not Required
  • Ring And Pinion Setup Not Altered
  • Installs Easily In Front/Rear Or Both
  • Proven In Most Demanding Applications

1921-LR Application Notes

  • For GM 8.5" (10 Bolt)
  • 30 Spline
  • For Open Differential

Warranty

2 Years or 100,000 Miles

1921-LR Specifications

Axle Shaft Diameter 1.31 (Inch)
Carrier Type Open
Differential Case Design Type GM 8.5
Ring Gear Bolt Quantity 10
Spline Quantity 30
Where to buy

Vehicle Applications

  • 1991 – 1996 Buick Commercial Chassis
  • 1988 – 1990 Buick Electra
  • 1991 – 1996 Buick Roadmaster
  • 1991 – 1992 Cadillac Brougham
  • 1988 – 1998 Chevrolet Blazer
  • 1988 – 1998 Chevrolet C1500
  • 1992 – 1998 Chevrolet C1500 Suburban
  • 1988 – 1996 Chevrolet Caprice
  • 1996 – 1998 Chevrolet Express 1500
  • 1988 – 1995 Chevrolet G10
  • 1988 – 1995 Chevrolet G20
  • 1994 – 1996 Chevrolet Impala
  • 1988 – 1998 Chevrolet K1500
  • 1993 – 1998 Chevrolet K1500 Suburban
  • 1988 – 1991 Chevrolet K2500
  • 1988 Chevrolet R10 Suburban
  • 1989 – 1991 Chevrolet R1500 Suburban
  • 1994 – 1998 Chevrolet S10
  • 1988 – 1994 Chevrolet S10 Blazer
  • 1995 – 1998 Chevrolet Suburban 1500
  • 1995 – 1998 Chevrolet Tahoe
  • 1988 Chevrolet V10 Suburban
  • 1989 – 1991 Chevrolet V1500 Suburban
  • 1988 Chevrolet V20 Suburban
  • 1989 – 1991 Chevrolet V2500 Suburban
  • 1988 – 1998 GMC C1500
  • 1992 – 1998 GMC C1500 Suburban
  • 1988 – 1995 GMC G1500
  • 1988 – 1995 GMC G2500
  • 1994 – 1998 GMC Jimmy
  • 1988 – 1998 GMC K1500
  • 1992 – 1998 GMC K1500 Suburban
  • 1988 – 1991 GMC K2500
  • 1988 – 1991 GMC R1500 Suburban
  • 1996 – 1998 GMC Savana 1500
  • 1994 – 1998 GMC Sonoma
  • 1992 – 1993 GMC Typhoon
  • 1988 – 1991 GMC V1500 Suburban
  • 1988 – 1991 GMC V2500 Suburban
  • 1992 – 1998 GMC Yukon
  • 1988 – 1992 Oldsmobile Custom Cruiser
  • 1990 – 1994 Plymouth Legend
  • 1988 – 1989 Pontiac Bonneville
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