1977-1990 B-Body CrossmemberFits Models: Caprice, Impala, LeSabre, Oldsmobile 88, Bonneville, Parisienne, Catalina Fits Years: 77 90 Fits Transmissions: 700R4, 4L60, Pre 1996 4L60E, TKO 500, TKO 600, TKX. This crossmember will fit 1996 and later 4L60E, and 4L65E transmissions for LS engine swaps. The RCB3 700 is designed for the 700R4 4l60E transmission with a case mount transmission mount. For a 700R4 with a tailshaft mount purchase the RCB3 400 crossmember instead. Engineered
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This crossmember will fit 1996 and later 4L60E, and 4L65E transmissions for LS engine swaps.
The RCB3-700 is designed for the 700R4 / 4l60E transmission with a case mount transmission mount. For a 700R4 with a tailshaft mount purchase the RCB3-400 crossmember instead.
Engineered with 2 mounting slots to accept a standard height transmission mount.
We recommend a polyurethane transmission mount. The GMTM is sold separately.
Boss Hog Torque Converters recommended for this application: