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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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    1979-1981 CHEVROLET K20 PICKUP

    • EngineType: ALL
    • SubModel: CHEYENNE

    1981 CHEVROLET K20 PICKUP

    • EngineType: ALL
    • SubModel: DELUXE

    1970-1972 OLDSMOBILE CUSTOM CRUISER

    • CC: 5733
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1983-1984 CHEVROLET K20 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    1967-1968 CHEVROLET CHEVELLE

    • EngineType: ALL
    • SubModel: CONCOURS

    1980 OLDSMOBILE CUTLASS

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1979-1980 CHEVROLET K20 SUBURBAN

    • EngineType: ALL
    • SubModel: SILVERADO

    1979 CHEVROLET MALIBU

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

    1995-1999 CHEVROLET TAHOE

    • EngineType: ALL
    • SubModel: ALL

    1972 CHEVROLET CHEVELLE

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: CONCOURS
    • Engine Vin: J
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973 CHEVROLET CHEVELLE

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: DELUXE
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972-1973 CHEVROLET G20 VAN

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

    2008-2011 CHEVROLET TAHOE

    • EngineType: ALL
    • SubModel: HYBRID

    1974 PONTIAC LEMANS

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

    1994-1996 CADILLAC COMMERCIAL CHASSIS

    • EngineType: ALL
    • SubModel: ALL

    1968 OLDSMOBILE CUTLASS

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

    1989 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: ALL
    • EngineType: ALL

    1979-1980 CHEVROLET MALIBU

    • EngineType: ALL
    • SubModel: ESTATE

    2006 CHEVROLET TAHOE

    • Liter: 4.8
    • SubModel: LS
    • CUI: 294
    • EngineType: V8 ( 4.8 L / 294 )

    1973 CHEVROLET CHEVELLE

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

    1973 CHEVROLET CHEVELLE

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: DELUXE
    • Engine Vin: T
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980 OLDSMOBILE CUTLASS

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

    1976-1977 OLDSMOBILE OMEGA

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

    1972 CHEVROLET G20 VAN

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

    1975-1976 CHEVROLET NOVA

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

    1973-1974 BUICK APOLLO

    • EngineType: ALL
    • SubModel: ALL

    1975 CHEVROLET CAMARO

    • Liter: 4.1
    • SubModel: RS
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1970-1971 CHEVROLET BEL AIR

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

    1974 PONTIAC LEMANS

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

    1971-1972 PONTIAC LAURENTIAN

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

    1975 PONTIAC FIREBIRD

    • Liter: 6.6
    • SubModel: FORMULA
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1990 CHEVROLET ASTRO

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

    1982-1983 CHEVROLET MALIBU

    • Liter: 4.3
    • SubModel: CLASSIC
    • CUI: 260
    • EngineType: V6 ( 4.3 L / 260 )

    1989-1991 GMC R2500 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    1980 OLDSMOBILE CUTLASS

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

    1972 CHEVROLET KINGSWOOD

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

    1970 CHEVROLET MONTE CARLO

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

    1972 CHEVROLET TOWNSMAN

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

    1972 CHEVROLET CHEVELLE

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

    1978 BUICK SKYLARK

    • EngineType: ALL
    • SubModel: S

    1977-1978 CHEVROLET CAPRICE

    • EngineType: ALL
    • SubModel: CLASSIC

    1980-1981 BUICK CENTURY

    • EngineType: ALL
    • SubModel: SPORT

    1972 CHEVROLET CHEVELLE

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: CONCOURS
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1995-1996 GMC K1500 PICKUP

    • EngineType: ALL
    • SubModel: SIERRA SL

    1973-1974 CHEVROLET C20 PICKUP

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

    1999-2000 GMC SAVANA 2500

    • EngineType: ALL
    • SubModel: ALL

    1968 OLDSMOBILE CUTLASS

    • EngineType: ALL
    • SubModel: S

    1981 BUICK CENTURY

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1976-1977 OLDSMOBILE OMEGA

    • Liter: 4.3
    • SubModel: F85
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1975-1976 CHEVROLET MONTE CARLO

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

    1968 CHEVROLET CHEVELLE

    • EngineType: ALL
    • SubModel: 300 DELUXE

    1982 CHEVROLET C20 SUBURBAN

    • EngineType: ALL
    • SubModel: SILVERADO

    2000 CHEVROLET TAHOE

    • Liter: 5.7
    • SubModel: Z71
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1965 CHEVROLET CHEVELLE

    • Liter: 3.2
    • SubModel: SS
    • CUI: 194
    • EngineType: L6 ( 3.2 L / 194 )

    2005 GMC S15 JIMMY

    • CC: 4294
    • Liter: 4.3
    • SubModel: BASE
    • EngineType: V6 ( 4.3 L / 4294 CC )

    1975 CHEVROLET IMPALA

    • CC: 5735
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973-1974 CHEVROLET NOVA

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: T
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975 BUICK APOLLO

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

    1970-1972 CHEVROLET CHEVELLE

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

    1981 CHEVROLET CAMARO

    • EngineType: ALL
    • SubModel: SPORT

    1971 CHEVROLET BEL AIR

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

    1977 PONTIAC LEMANS

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

    1990-1993 CHEVROLET G10 VAN

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

    1981 PONTIAC LEMANS

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1964-1967 CHEVROLET CHEVELLE

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

    1971 CHEVROLET G20 VAN

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

    1971 BUICK ESTATE WAGON

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

    1982-1987 PONTIAC GRAND PRIX

    • EngineType: ALL
    • SubModel: ALL

    1966-1967 CHEVROLET BEL AIR

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

    1985 GMC C1500 PICKUP

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

    1978-1979 PONTIAC LEMANS

    • CC: 3800
    • Liter: 3.8
    • SubModel: SAFARI
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1975-1976 CHEVROLET MALIBU

    • Liter: 6.6
    • SubModel: CLASSIC
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1978-1979 OLDSMOBILE OMEGA

    • EngineType: ALL
    • SubModel: ALL

    2000-2001 GMC S15 JIMMY

    • EngineType: ALL
    • SubModel: DIAMOND EDITION

    1975 OLDSMOBILE CUTLASS

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

    2001-2004 GMC YUKON

    • EngineType: ALL
    • SubModel: SLE

    1975 OLDSMOBILE DELTA 88

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

    1979-1980 CHEVROLET C10 SUBURBAN

    • EngineType: ALL
    • SubModel: SILVERADO

    1973 CHEVROLET LAGUNA

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

    1971 CHEVROLET IMPALA

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

    1974-1978 CHEVROLET G20 VAN

    • EngineType: ALL
    • SubModel: ALL

    1997 CHEVROLET C2500 PICKUP

    • Liter: 6.5
    • SubModel: CHEYENNE
    • CUI: 395
    • EngineType: V8 ( 6.5 L / 395 )

    1976 CHEVROLET NOVA

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1991-1993 CHEVROLET CAPRICE

    • EngineType: ALL
    • SubModel: CLASSIC LTZ

    1971 CHEVROLET KINGSWOOD

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

    1980-1981 BUICK CENTURY

    • EngineType: ALL
    • SubModel: ESTATE

    1973 CHEVROLET MONTE CARLO

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

    1985 GMC C1500 PICKUP

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

    1999 CHEVROLET EXPRESS 2500

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

    1976 PONTIAC LEMANS

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

    1979-1986 GMC K2500 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1964 CHEVROLET CHEVELLE

    • EngineType: ALL
    • SubModel: SS

    1973 PONTIAC LEMANS

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

    1984 CADILLAC FLEETWOOD

    • EngineType: ALL
    • SubModel: ALL

    1975-1976 CHEVROLET CAPRICE

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

    1971 BUICK GS

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

    1980 PONTIAC GRAND PRIX

    • EngineType: ALL
    • SubModel: ALL

    1972 CHEVROLET CHEVELLE

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

    1981 GMC C1500 PICKUP

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

    1989-1992 GMC K1500 PICKUP

    • EngineType: ALL
    • SubModel: SIERRA SLE
    1921-LR - Powertrax Lock Right - Automatic Positive Locking Differentials | Jegs is rated 5.0 out of 5 by 2.
    • y_2017, m_3, d_24, h_15
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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
    • y_2017, m_3, d_24, h_15
    • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_2
    • loc_en_US, sid_10001_10001_2077238, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
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