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Powertrax 1921-LR

Automatic Positive Locking Differential GM 8.5"

Powertrax 1921-LR

754-1921-LR

made in usa
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Powertrax 1921-LR Automatic Positive Locking Differential GM 8.5" $339.99
Automatic Positive Locking Differential
  • GM 8.5"
  • 30-Spline

  • Powertrax 1921-LR Details

    GM

  • Brute Force Devices For Rugged Applications
  • Best Value For Greatly Increased Traction
  • Complete Replacement Of Diff. Case Not Req.
  • Simple Installation
  • Ring And Pinion Setup Not Altered
  • Installs Easily In Front/Rear Or Both
  • Proven In Most Demanding Applications

  • Specifications:

    Spline Count
    30
    Differential Case Design Type
    GM 8.5
    Axle Shaft Spline Quantity
    30
    Aftermarket Carrier Style
    Locker
    Carrier Material
    Steel
    Cover Bolts
    10
    Quantity
    Sold individually
    Manufacturer's Part Number:
    1921-LR

    Extreme 4x4 Performance or 4x4 Output from a 4x2

    This revolutionary design replaces differential spider gears with a coupler gear set that dramatically increases traction. With spider gear differentials, the wheel that has the least amount of traction typically gets full power, which isn't good for a stuck truck. Lock Right Differentials send power to the wheel that has the most traction, enabling escape from almost any situation. Installation time is about an hour; no special tools or setup required because the ring and pinion gears are unaffected.

    Note: Installs in open carriers only

    Does Powertrax 1921-LR fit your vehicle?

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    2000 CHEVROLET TAHOE

    • EngineType: ALL
    • SubModel: LIMITED

    1990-1993 GMC G15/G1500 VAN

    • Liter: 5.0
    • SubModel: RALLY
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1987 CHEVROLET V20 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1979-1988 GMC JIMMY

    • EngineType: ALL
    • SubModel: ALL

    1981 GMC C1500 PICKUP

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978 GMC K15 SUBURBAN

    • Liter: 5.0
    • SubModel: SIERRA GRANDE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1971 OLDSMOBILE CUSTOM CRUISER

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1985 GMC C1500 PICKUP

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972-1974 CHEVROLET BEL AIR

    • EngineType: ALL
    • SubModel: ALL

    1979-1986 GMC K1500 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    1977 OLDSMOBILE CUTLASS SUPREME

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1975-1977 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1992-1996 GMC K2500 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    1981 PONTIAC LEMANS

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 229
    • EngineType: V6 ( 3.8 L / 229 )

    1994 CHEVROLET S10 BLAZER

    • EngineType: ALL
    • SubModel: TAHOE

    1970 CHEVROLET NOVA

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1975 CHEVROLET CAMARO

    • Liter: 5.7
    • SubModel: RS
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980 OLDSMOBILE CUTLASS

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1974 GMC C25/C2500 SUBURBAN

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969 CHEVROLET BEL AIR

    • CC: 6998
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1980 GMC K2500 SUBURBAN

    • EngineType: ALL
    • SubModel: SIERRA CLASSIC

    1967 OLDSMOBILE DELMONT 88

    • EngineType: ALL
    • SubModel: ALL

    1983-1984 CHEVROLET C10 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    1975 OLDSMOBILE CUTLASS SUPREME

    • EngineType: ALL
    • SubModel: HURST

    1980 GMC K2500 SUBURBAN

    • Liter: 4.8
    • SubModel: BASE
    • CUI: 292
    • EngineType: L6 ( 4.8 L / 292 )

    1979 GMC K2500 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    2006 CHEVROLET TAHOE

    • CC: 5328
    • Liter: 5.3
    • SubModel: LT
    • CUI: 325
    • EngineType: V8 ( 5.3 L / 325 )

    1966 OLDSMOBILE JETSTAR 88

    • CC: 5409
    • Liter: 5.4
    • SubModel: HOLIDAY
    • CUI: 330
    • EngineType: V8 ( 5.4 L / 330 )

    1973 PONTIAC VENTURA

    • CC: 5031
    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1965 CHEVROLET CHEVELLE

    • CC: 4638
    • Liter: 4.6
    • SubModel: SS
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1973 CHEVROLET K20 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1972 CHEVROLET CAPRICE

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977 PONTIAC LEMANS

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    2003-2004 CHEVROLET S10 BLAZER

    • EngineType: ALL
    • SubModel: ZR2

    1987 GMC S15 JIMMY

    • EngineType: ALL
    • SubModel: BASE

    1975 CHEVROLET NOVA

    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1998 CHEVROLET C2500 PICKUP

    • EngineType: ALL
    • SubModel: CHEYENNE

    1970-1972 CHEVROLET CAPRICE

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1980 OLDSMOBILE CUTLASS

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1985-1986 GMC C2500 SUBURBAN

    • EngineType: ALL
    • SubModel: HIGH SIERRA

    1995-2001 CHEVROLET S10 PICKUP

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1968-1971 PONTIAC LEMANS

    • EngineType: ALL
    • SubModel: ALL

    1975 CHEVROLET BEL AIR

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980 GMC K2500 SUBURBAN

    • EngineType: ALL
    • SubModel: SIERRA GRANDE

    1965-1966 OLDSMOBILE DELTA 88

    • CC: 6966
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 425
    • EngineType: V8 ( 7.0 L / 425 )

    1994 CHEVROLET C1500 PICKUP

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1968 OLDSMOBILE F85

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1997 CHEVROLET C2500 PICKUP

    • Liter: 5.0
    • SubModel: CHEYENNE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1988-1994 GMC S15 JIMMY

    • EngineType: ALL
    • SubModel: ALL

    1981 CHEVROLET CAMARO

    • EngineType: ALL
    • SubModel: SPORT

    1980 GMC K2500 SUBURBAN

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    2000-2009 CHEVROLET EXPRESS 2500

    • EngineType: ALL
    • SubModel: ALL

    1970-1972 CHEVROLET CHEVELLE

    • EngineType: ALL
    • SubModel: GREENBRIER

    1990-1991 CHEVROLET V1500 SUBURBAN

    • Fitment_Note: w/Beam Axle~w/Locking Hubs Or Front Axle Disconnect; w/o Full Time 4WD~Do Not Operate On Highway w/Front Hubs Locked And 4WD Engaged
    • SubModel: ALL
    • EngineType: ALL

    1972-1974 PONTIAC BONNEVILLE

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1972 CHEVROLET KINGSWOOD

    • CC: 7441
    • Liter: 7.4
    • SubModel: ESTATE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1977 PONTIAC VENTURA

    • Liter: 3.8
    • SubModel: SJ
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1973 CHEVROLET EL CAMINO

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1990-1991 CHEVROLET K2500 PICKUP

    • Fitment_Note: w/Beam Axle~w/Locking Hubs Or Front Axle Disconnect; w/o Full Time 4WD~Do Not Operate On Highway w/Front Hubs Locked And 4WD Engaged
    • SubModel: CHEYENNE
    • EngineType: ALL

    1970-1971 CHEVROLET CAPRICE

    • CC: 7441
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973 PONTIAC LEMANS

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1995 CHEVROLET S10 PICKUP

    • Liter: 4.3
    • SubModel: SS
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1987 GMC V1500 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    2002-2008 GMC SAVANA 1500

    • EngineType: ALL
    • SubModel: ALL

    1971 OLDSMOBILE DELTA 88

    • EngineType: ALL
    • SubModel: CUSTOM

    1997 CHEVROLET C2500 PICKUP

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1983-1986 CHEVROLET S10 BLAZER

    • EngineType: ALL
    • SubModel: TAHOE

    1975-1978 GMC C25 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    1996 CHEVROLET C2500 PICKUP

    • EngineType: ALL
    • SubModel: SILVERADO

    1985-1988 CHEVROLET CAPRICE

    • Liter: 4.3
    • SubModel: CLASSIC
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1977 OLDSMOBILE CUTLASS SUPREME

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    1971 CHEVROLET IMPALA

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980-1981 OLDSMOBILE CUTLASS

    • Liter: 5.7
    • SubModel: LS
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1999-2001 CHEVROLET S10 PICKUP

    • EngineType: ALL
    • SubModel: XTREME

    1971 CHEVROLET BEL AIR

    • CC: 6588
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    2003-2004 CHEVROLET TAHOE

    • EngineType: ALL
    • SubModel: Z71

    1985-1986 GMC C2500 SUBURBAN

    • EngineType: ALL
    • SubModel: SIERRA CLASSIC

    1978 BUICK SKYLARK

    • EngineType: ALL
    • SubModel: BASE

    1996-1998 CHEVROLET S10 PICKUP

    • Liter: 4.3
    • Aspiration: N
    • SubModel: SS
    • Engine Vin: W
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1972 PONTIAC LEMANS

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1996 CHEVROLET C2500 PICKUP

    • EngineType: ALL
    • SubModel: BASE

    1986 CHEVROLET BLAZER K5

    • EngineType: ALL
    • SubModel: ALL

    1989 CHEVROLET V1500 SUBURBAN

    • Fitment_Note: w/Beam Axle
    • SubModel: ALL
    • EngineType: ALL

    1999 GMC S15 JIMMY

    • EngineType: ALL
    • SubModel: ENVOY

    1975 PONTIAC GRAND LEMANS

    • EngineType: ALL
    • SubModel: ALL

    1969-1971 PONTIAC PARISIENNE

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: LANDAU

    1975 OLDSMOBILE DELTA 88

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1973-1974 CHEVROLET C20 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1965 CHEVROLET CORVETTE

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1998-2001 CHEVROLET EXPRESS 1500

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: R
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 CHEVROLET KINGSWOOD

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1993 GMC SONOMA

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1972 OLDSMOBILE F85

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972-1974 PONTIAC CATALINA

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974 CHEVROLET CAMARO

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    2009-2010 GMC SAVANA 1500

    • EngineType: ALL
    • SubModel: BASE

    1972-1973 PONTIAC CATALINA

    • CC: 6556
    • Liter: 6.6
    • SubModel: SAFARI
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1976 PONTIAC CATALINA

    • EngineType: ALL
    • SubModel: BASE

    1980 OLDSMOBILE CUTLASS

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )
    1921-LR - Powertrax Lock Right - Automatic Positive Locking Differentials | Jegs is rated 5.0 out of 5 by 2.
    • y_2017, m_2, d_19, h_22
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    Rated 5 out of 5 by from Works great The install was super easy and works just as advertised. Great product.
    Date published: 2014-11-02
    Rated 5 out of 5 by from The locker works great, like it much better than a limited slip. I might say some guys might not like the clicking when turning, for the return on total lock up, well worth it.
    Date published: 2016-12-20
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