A modified transmission management mechanism alters the usual shift sequence in a GM Turbo Hydra-Matic 400 (TH400) computerized transmission. Sometimes, these transmissions observe a P-R-N-D-2-1 shift order. This modification reorders the sequence, usually putting first gear closest to the motive force and progressing to larger gears with every successive lever motion away from the motive force. A standard association turns into P-R-N-1-2-3.
This modification gives benefits in efficiency functions, significantly drag racing. The revised sequence allows faster, extra intuitive gear adjustments throughout acceleration, minimizing response time and enhancing management. Traditionally, the alteration supplied a aggressive edge earlier than the arrival of digital shift management programs. The configuration stays fashionable in autos the place fast, exact shifting is paramount, and legacy transmission designs are retained.
