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Differential Ring and Pinion for 1970-1972 Buick Skylark
InfoVehicle Info Needed
EXCELPART NUMBER: 857-GM85308

Differential Ring and Pinion for 1970-1972 Buick Skylark

$16831
ShippingShips on 11/06/2026
Lowest PriceLowest Price Guarantee

Differential Ring and Pinion
  • 1970-1972 Buick Skylark
  • 3.08 Gear Ratio with 40-Tooth Ring Gear
  • 8620 Steel Ring and Pinion Construction
  • 30-Spline Pinion Shaft, 1.626 in. Diameter

    This differential ring and pinion is manufactured to OEM specifications for 1970-1972 Buick Skylark and other listed applications, restoring correct drivetrain fit and function.

    Technical Specifications:

    • 1970-1972 Buick Skylark
    • 3.08 Gear Ratio with 40-Tooth Ring Gear
    • 8620 Steel Ring and Pinion Construction
    • 30-Spline Pinion Shaft, 1.626 in. Diameter
    • Part TypeRing and Pinion
    BrandEXCEL
    Package Height6.0
    Package Width12.0
    Package Length14.0
    Weight16.66 PG
    Part CategoryReplacement Parts
    Ring Gear RotationStandard
    Ring Gear Tooth Quantity40
    Differential Case Design TypeGM 8.5, GM 8.625
    PositionFront, Rear
    Differential Carrier Break2.73 Ratio and Higher
    Cover Bolt Quantity10
    Pinion Spline Count30
    Ring Gear Material8620 Steel
    Ring Gear Outside Diameter8.5 in.
    Pinion Shaft Diameter1.626 in.
    Pinion Gear Tooth Quantity13
    Gear Ratio3.08
    Ring Gear Bolt Quantity10
    Part FitmentDirect Fit
    Mounting LocationRear
    ApplicationGM 8.625"
    Vendor Part NumberGM85308
    Package Qty1
    Package TypeEA
    Please click here to download the instructions PDF file

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