The TCI 4x Four-Speed Auto Transmission series allows the use of a popular 4L80E or 700R4 transmission with non-GM performance applications. Both the 4L80E-based and 700R4-based versions of the 4x Four-Speed feature an SFI-spec adapter bellhousing for easy installation of the transmission behind a Small or Big Block Ford Ford Modular Small or Big Block Chrysler Gen III Hemi Buick Pontiac Oldsmobile or GM engine.
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