96 quest Hard shifting from 1-2 when warm repeatable hard codes P0120, P0325, P1705

Question

Hard shifting from 1-2 when warm 96 quest with consistently repeatable hard codes P0120, P0325, P1705

higher gear shifts are a little hard shifting but they get progressively lighter in a quantum leap as the gears climb. Car has 75K original miles and is immaculate. There is barely any dirt in the engine compartment.

Engine light comes on when this starts to occur.

This happened post loss of power/rpm on highway with cruise on 70 mph and fluctuations of the RPM.

When it is occurring after warm up, flooring the gas peddle produces a slow steady acceleration with no jump in RPM or down shift of trans.

Fluid level is full and clear no burn smell. used LKQ used parts to replace for diagnostic purposes the MAFS(cleaned first), TPS, ECM (twice off 96 (125K) and 97 (112K) same cars for MAFS and TPS).

Next steps will be to try a replacement TCM, clean throttle body, check MAF screen for clog, check for vacuum leaks and dropping resistor. Please help before I jump off the edge. I will barter anything I can for guidance to resolve this issue asap.

Answer 1

P0120 Throttle position sensor switch malfunction

P1705 Throttle position sensor and throttle position switch

Replace the TPS, As for the code condition P0325 which is a knock sensor. Just resolve the TPS.