This is the correct pin style TCS switch for your 1970, 1971, and 1972 Chevelle or Nova. Mounts to your manual transmission cover on all Muncie Four Speed Transmissions. This TCS switch advances the timing when shifting into 4th gear. Add this hard to find transmission spark control switch to your classic today.
PART NUMBER: TRA-1021
Original GM Part # 3961567
Exact Fit for all M20, M21, and M22 Transmissions
