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Code 80, Transmission Component Slipping: Notes

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