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Richmond Gear GM 12 Bolt Ring & Pinion Gear Set Ratio: 3.90

Richmond Gear 49-0040-1

836-49-0040-1

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Richmond Gear GM 12 Bolt Ring & Pinion Gear Set Ratio: 3.90 $254.22
GM 12 Bolt Ring & Pinion Gear Set
  • Ratio: 3.90
  • Teeth: 39-10
  • Series: 3

  • Richmond Gear 49-0040-1 Details

    12-Bolt 8.875" Passenger Car

  • 3 Series Fits 3.07 to 3.73 Ratio Carrier, 4 Series Fits 3.90 and Numerically Higher Carrier.
  • 30 Spline, 1.625 Diameter Pinion.

  • 1965-72 Bel Air, Caprice, Impala, Chevelle, El Camino, Chevy II, 1967-72 Camaro, 1970-72 Nova, GTO, Firebird, 68-69 Olds F-85

  • Specifications:

    Axle Type
    GM 12 Bolt
    Differential Case Design Type
    GM 8.875
    Ring Gear Tooth Quantity
    39
    Cover Bolt Quantity
    12
    Gear Ratio
    3.90
    Ring Gear Diameter
    8.875
    Ring Gear Bolt Quantity
    12
    Pinion Shaft Diameter
    1.625
    Pinion Spline Count
    30
    Ring Gear Rotation
    Standard
    Pinion Gear Tooth Quantity
    10
    Ring Gear Material
    8620 Steel
    Differential Carrier Break
    3.73 and Lower
    Carrier Series
    3
    Cover Bolts
    12
    Installation Kit Included
    No
    Pinion Gear Teeth
    10
    Pinion Shaft Diameter (in.)
    1.625
    Pinion Spline Count
    30
    Quantity
    Sold as a set
    Ring and Pinion Ratio
    3.90:1
    Ring Gear Bolts
    12
    Ring Gear Diameter (in.)
    8.875
    Ring Gear Rotation
    Standard
    Ring Gear Teeth
    39
    Manufacturer's Part Number:
    49-0040-1

    Richmond Gear is the leading manufacturer of professional quality, high performance ring and pinion sets. The superior quality of these gear sets is the result of years of racing development, outstanding design, and state-of-the-art manufacturing methods. 12 Bolt Street Gears are designed to withstand the rigors of everyday driving, and a weekend at the track. Gears available for nearly all popular domestic applications.

    Choose The Gear Ratio That Is Best For Your Vehicle
    .

    Does Richmond Gear 49-0040-1 fit your vehicle?

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    Aspiration

    1970-1972 CHEVROLET NOVA

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

    1972 OLDSMOBILE CUTLASS SUPREME

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

    1967-1968 PONTIAC PARISIENNE

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

    1970-1972 CHEVROLET CHEVELLE

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

    1972 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: GREENBRIER
    • Engine Vin: U
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1972 CHEVROLET EL CAMINO

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

    1970-1971 PONTIAC FIREBIRD

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

    1968-1969 PONTIAC BEAUMONT

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

    1972 CHEVROLET CHEVELLE

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

    1969 CHEVROLET CAMARO

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

    1968-1970 PONTIAC EXECUTIVE

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

    1970-1972 CHEVROLET CHEVELLE

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

    1970-1972 OLDSMOBILE VISTA CRUISER

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

    1967-1970 CHEVROLET CAMARO

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

    1972 GMC SPRINT

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

    1968-1970 PONTIAC EXECUTIVE

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

    1968-1969 CHEVROLET EL CAMINO

    • CC: 6489
    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1967 BUICK GRAN SPORT

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

    1970 CHEVROLET IMPALA

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

    1972 CHEVROLET EL CAMINO

    • CC: 7439
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973 CHEVROLET CHEVELLE

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

    1970-1972 PONTIAC PARISIENNE

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

    1965-1968 PONTIAC STRATO-CHIEF

    • CC: 6489
    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1969 CHEVROLET EL CAMINO

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

    1966-1967 CHEVROLET EL CAMINO

    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1969 CHEVROLET CHEVELLE

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

    1972 PONTIAC FIREBIRD

    • CC: 6555
    • Liter: 6.6
    • Aspiration: N
    • SubModel: FORMULA
    • Engine Vin: T
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1969 CHEVROLET IMPALA

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

    1971 PONTIAC BONNEVILLE

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

    1970 PONTIAC TEMPEST

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

    1968-1971 OLDSMOBILE DELTA 88

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

    1972 GMC SPRINT

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

    1972 CHEVROLET CHEVELLE

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

    1964 CHEVROLET CHEVELLE

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1972 PONTIAC LEMANS

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

    1971-1972 CHEVROLET CHEVELLE

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

    1972 CHEVROLET CAMARO

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1969 OLDSMOBILE VISTA CRUISER

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

    1969 PONTIAC LEMANS

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

    1970 CHEVROLET CHEVELLE

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

    1971 OLDSMOBILE DELTA 88

    • EngineType: ALL
    • SubModel: CUSTOM

    1969 CHEVROLET CHEVELLE

    • EngineType: ALL
    • SubModel: SS

    1968 PONTIAC LEMANS

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

    1972 PONTIAC LEMANS

    • EngineType: ALL
    • SubModel: LUXURY

    1970 OLDSMOBILE F85

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

    1967 CHEVROLET CHEVELLE

    • EngineType: ALL
    • SubModel: CONCOURS

    1972 CHEVROLET CAPRICE

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

    1972 CHEVROLET MONTE CARLO

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1972 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: CONCOURS
    • Engine Vin: S
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1972 CHEVROLET CHEVELLE

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

    1970-1972 CHEVROLET CHEVELLE

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

    1967 CHEVROLET CHEVY II

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

    1965-1967 PONTIAC BEAUMONT

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

    1972 PONTIAC FIREBIRD

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

    1970-1971 PONTIAC LEMANS

    • EngineType: ALL
    • SubModel: SPORT

    1970-1971 PONTIAC FIREBIRD

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

    1972 PONTIAC GRAND PRIX

    • CC: 6556
    • Liter: 6.6
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1968 CHEVROLET CHEVELLE

    • CC: 3769
    • Liter: 3.8
    • SubModel: 300
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1965 CHEVROLET IMPALA

    • CC: 3769
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1968 CHEVROLET CHEVY II

    • EngineType: ALL
    • SubModel: ALL

    1968 CHEVROLET CHEVELLE

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

    1970-1971 CHEVROLET CHEVELLE

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

    1972 OLDSMOBILE F85

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

    1965-1966 OLDSMOBILE JETSTAR 88

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

    1965-1968 PONTIAC STRATO-CHIEF

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1970-1972 PONTIAC GTO

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

    1972 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: GREENBRIER
    • Engine Vin: S
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1972 GMC SPRINT

    • CC: 7439
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968 CHEVROLET CHEVELLE

    • CC: 3769
    • Liter: 3.8
    • SubModel: 300 DELUXE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1966-1969 CHEVROLET CAPRICE

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1967 CHEVROLET CHEVELLE

    • EngineType: ALL
    • SubModel: 300 DELUXE

    1966-1968 PONTIAC PARISIENNE

    • CC: 6489
    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1969 OLDSMOBILE F85

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

    1966-1968 PONTIAC LAURENTIAN

    • CC: 6489
    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1969 OLDSMOBILE F85

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

    1969 PONTIAC LEMANS

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

    1972 CHEVROLET IMPALA

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

    1971-1972 CHEVROLET CHEVELLE

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

    1965 BUICK SPORTWAGON

    • CC: 4917
    • Liter: 4.9
    • SubModel: BASE
    • CUI: 300
    • EngineType: V8 ( 4.9 L / 300 )

    1970 OLDSMOBILE DELTA 88

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

    1971 PONTIAC FIREBIRD

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

    1970 PONTIAC LAURENTIAN

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

    1969 PONTIAC LEMANS

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

    1968-1971 OLDSMOBILE DELTA 88

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

    1972 PONTIAC CATALINA

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

    1968-1969 CHEVROLET EL CAMINO

    • CC: 3769
    • Liter: 3.8
    • SubModel: CUSTOM
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1969 PONTIAC LEMANS

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

    1972 CHEVROLET CAPRICE

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

    1967 CHEVROLET CAMARO

    • EngineType: ALL
    • SubModel: RS

    1972 CHEVROLET EL CAMINO

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

    1972 CHEVROLET EL CAMINO

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

    1970-1971 PONTIAC LEMANS

    • EngineType: ALL
    • SubModel: BASE

    1972 CHEVROLET CHEVELLE

    • CC: 7441
    • Liter: 7.4
    • Aspiration: N
    • SubModel: NOMAD
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1971 CHEVROLET NOVA

    • CC: 7439
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1972 CHEVROLET CHEVELLE

    • CC: 7441
    • Liter: 7.4
    • Aspiration: N
    • SubModel: MALIBU
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1969 CHEVROLET CHEVELLE

    • CC: 3769
    • Liter: 3.8
    • SubModel: 300 DELUXE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1969 PONTIAC LEMANS

    • CC: 5733
    • Liter: 5.7
    • Aspiration: N
    • SubModel: SAFARI
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1970-1972 PONTIAC PARISIENNE

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

    1968-1971 OLDSMOBILE VISTA CRUISER

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

    1972 CHEVROLET CHEVELLE

    • CC: 6555
    • Liter: 6.6
    • SubModel: MALIBU
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )
    49-0040-1 is rated 2.0 out of 5 by 1.
    Rated 2 out of 5 by from They Howl Wanted 3.90 gears so I mistakenly bought these. Set them up within a thou and running .007" backlash and they constantly make noise. Richmond gears are known for their noise and these are no different.
    Date published: 2015-10-03
    • y_2018, m_8, d_20, h_1
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    Items You Need
    Some parts are not legal for use in California or other states with similar laws / regulations