# Zone Offroad 73-80 Chevy 1/2 3/4 Ton T-Case Drop This 1" transfer case drop will help reduce or eliminate the front driveline vibration from 6" or taller suspension lifts by reducing the driveshaft angles. Front driveline correction typically becomes necessary with 6" of lift or more on 73-80 1/2 ton trucks, Blazers, Jimmy's, and Suburban's. - Repositions crossmember to improve driveline angles to eliminate driveline vibrations - Includes brackets, extended hardware and thread locker - 1" drop, designed for use with 6"+ lift kits This Part Fits: Year Make Model Submodel 1973-1974 Chevrolet Blazer Base 1987 Chevrolet Blazer Custom Deluxe 1988-1991 Chevrolet Blazer Scottsdale 1987-1991 Chevrolet Blazer Silverado 1975-1981 Chevrolet K10 Cheyenne 1981-1986 Chevrolet K10 Custom 1975-1980 Chevrolet K10 Custom Deluxe 1981 Chevrolet K10 Deluxe 1975-1986 Chevrolet K10 Scottsdale 1975-1986 Chevrolet K10 Silverado 1973-1974 Chevrolet K10 Pickup Base 1973-1974 Chevrolet K10 Suburban Base 1981-1986 Chevrolet K10 Suburban Custom 1975-1980 Chevrolet K10 Suburban Custom Deluxe 1981 Chevrolet K10 Suburban Deluxe 1975-1980,1982,1984-1986 Chevrolet K10 Suburban Scottsdale 1975-1977,1979-1980,1982-1983,1985-1986 Chevrolet K10 Suburban Silverado 1975-1981 Chevrolet K20 Cheyenne 1981-1986 Chevrolet K20 Custom 1975-1980 Chevrolet K20 Custom Deluxe 1981 Chevrolet K20 Deluxe 1975-1986 Chevrolet K20 Scottsdale 1975-1983,1985-1986 Chevrolet K20 Silverado 1973-1974 Chevrolet K20 Pickup Base 1976 Chevrolet K5 Blazer Base 1975-1980 Chevrolet K5 Blazer Cheyenne 1981-1986 Chevrolet K5 Blazer Custom 1975,1977-1980 Chevrolet K5 Blazer Custom Deluxe 1981 Chevrolet K5 Blazer Deluxe 1984 Chevrolet K5 Blazer Scottsdale 1978,1980-1986 Chevrolet K5 Blazer Silverado 1987 Chevrolet V10 Custom Deluxe 1987 Chevrolet V10 Scottsdale 1987 Chevrolet V10 Silverado 1987 Chevrolet V10 Suburban Custom Deluxe 1987-1988 Chevrolet V10 Suburban Scottsdale 1987-1988 Chevrolet V10 Suburban Silverado 1987 Chevrolet V20 Custom Deluxe 1987 Chevrolet V20 Scottsdale 1987 Chevrolet V20 Silverado 1973-1991 GMC Jimmy Base 1975-1985 GMC Jimmy High Sierra 1975-1990 GMC Jimmy Sierra Classic 1975-1982 GMC Jimmy Sierra Grande 1975-1978 GMC K15 Base 1975-1978 GMC K15 High Sierra 1977 GMC K15 Indy Hauler 1975-1978 GMC K15 Sierra Classic 1975-1978 GMC K15 Sierra Grande 1975-1978 GMC K15 Suburban Base 1975-1978 GMC K15 Suburban High Sierra 1975-1978 GMC K15 Suburban Sierra Classic 1975-1978 GMC K15 Suburban Sierra Grande 1973-1974 GMC K15/K1500 Pickup Base 1973-1974 GMC K15/K1500 Suburban Base 1979-1986 GMC K1500 Base 1979-1986 GMC K1500 High Sierra 1979-1986 GMC K1500 Sierra Classic 1979-1982 GMC K1500 Sierra Grande 1979-1986 GMC K1500 Suburban Base 1979-1986 GMC K1500 Suburban High Sierra 1979-1986 GMC K1500 Suburban Sierra Classic 1979-1982 GMC K1500 Suburban Sierra Grande 1975-1978 GMC K25 Base 1975-1978 GMC K25 High Sierra 1975-1978 GMC K25 Sierra Classic 1975-1978 GMC K25 Sierra Grande 1973-1974 GMC K25/K2500 Pickup Base 1979-1986 GMC K2500 Base 1979-1986 GMC K2500 High Sierra 1979-1986 GMC K2500 Sierra Classic 1979-1982 GMC K2500 Sierra Grande 1987 GMC V1500 Base 1987 GMC V1500 High Sierra 1987 GMC V1500 Sierra Classic 1987 GMC V2500 Base 1987 GMC V2500 High Sierra 1987 GMC V2500 Sierra Classic 1987-1991 GMC V2500 Suburban Base 1987 GMC V2500 Suburban High Sierra 1987-1989 GMC V2500 Suburban Sierra Classic 1990 GMC V2500 Suburban SLE ## Details - **Price:** 64.81 CAD - **Vendor:** Zone Offroad - **Type:** Differential Dropouts ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 64.81 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Logo Image --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/zone-offroad-73-80-chevy-1-2-3-4-ton-t-case-drop) > Updated: 2026-07-15