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Differential Ring and Pinion (12 Bolt)

12BT373T Application Notes

Warranty

1 Year or 50,000 Miles

12BT373T Specifications

App Model GM 8.875 Truck

Cover Bolt Quantity 12

Differential Carrier Break 2.76 to 3.42 Ratio

Differential Case Design Type GM 8.875 Truck

Gear Ratio 3.73

Pinion Gear Tooth Quantity 11

Pinion Shaft Diameter 1.438 (Inch)

Pinion Spline Count 30

Ring Gear Bolt Quantity 12

Ring Gear Material 8620 Steel

Ring Gear Outside Diameter 8.875 (Inch)

Ring Gear Rotation Standard

Ring Gear Tooth Quantity 41

Taxonomy A LD Differential, LD Differential, LD Differential

Taxonomy B Ring and Pinion, Ring and Pinion, Ring and Pinion

Taxonomy C Rear, Rear, Rear

Taxonomy D 3.73, 3.73, 3.73

Where to buy

Vehicle Applications

1969 – 1974 Chevrolet Blazer
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1982 Chevrolet C10
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1965 – 1967 Chevrolet C10 Panel
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1964 Chevrolet C10 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
- 1963-1964 Models Require a 30 Spline Pinion Yoke
1965 – 1974 Chevrolet C10 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1982 Chevrolet C10 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1981 Chevrolet C20
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1969 – 1974 Chevrolet C20 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1973 – 1981 Chevrolet C20 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1981 Chevrolet G10
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1964 Chevrolet G10 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
- 1963-1964 Models Require a 30 Spline Pinion Yoke
1965 – 1974 Chevrolet G10 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1981 Chevrolet G20
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1974 Chevrolet G20 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1981 Chevrolet K10
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1964 Chevrolet K10 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
- 1963-1964 Models Require a 30 Spline Pinion Yoke
1965 – 1974 Chevrolet K10 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1982 Chevrolet K10 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1981 Chevrolet K20
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1969 – 1974 Chevrolet K20 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1973 – 1981 Chevrolet K20 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1981 Chevrolet K5 Blazer
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1980 Chevrolet P10
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1965 – 1967 Chevrolet P10 Series
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1974 Chevrolet P10 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1981 Chevrolet P20
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1966 – 1967 Chevrolet P20 Series
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1968 – 1974 Chevrolet P20 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1965 – 1966 Chevrolet Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1981 – 1982 Chevrolet Terrain
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
- 1963-1964 Models Require a 30 Spline Pinion Yoke
1975 – 1978 GMC C15
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1978 GMC C15 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1974 GMC C15/C1500 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1974 GMC C15/C1500 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1982 GMC C1500
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1981 GMC C1500 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1978 GMC C25
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1978 GMC C25 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1969 – 1974 GMC C25/C2500 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1969 – 1974 GMC C25/C2500 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1981 GMC C2500
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1981 GMC C2500 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1965 – 1966 GMC G1000 Series
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1978 GMC G15
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1974 GMC G15/G1500 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1981 GMC G1500
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1978 GMC G25
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1974 GMC G25/G2500 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1981 GMC G2500
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1970 – 1981 GMC Jimmy
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1966 GMC K1000 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1978 GMC K15
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1978 GMC K15 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1966 – 1974 GMC K15/K1500 Pickup
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1974 GMC K15/K1500 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1982 GMC K1500
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1982 GMC K1500 Suburban
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1978 GMC P15
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1974 GMC P15/P1500 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1980 GMC P1500
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1975 – 1978 GMC P25
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1967 – 1974 GMC P25/P2500 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1979 – 1981 GMC P2500
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1965 – 1966 GMC PB1000 Series
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1966 GMC PB15 Series
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1965 GMC PB1500 Series
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier
1966 GMC PB2500 Van
Application notes:
- For GM 8.875" (12 Bolt)
- 3.73 Ratio
- Thick Ring Gear
- Requires a 2.76 to 3.42 Ratio Carrier

Installation

Installation Instructions

⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov