Code 80, Transmission Component Slipping: Notes

WARNING: This page is about a different car, the 1994 Cadillac Fleetwood. However, it is still accessible from the selected car via links, so may be relevant.

PCM monitors difference between engine speed and transmission input shaft speed. With selector in D3 or D4 (indicated gear 2, 3 or 4), and TCC is locked, scan should display engine speed closely matching input speed.

NOTE: Test numbers refer to numbers on diagnostic chart.

Checks indicated range signal to the actual selected range.
Checks torque converter for slippage while in a commanded locked-up state.