I don't think the TRS is causing that, a bad TRS causes weird shifting and/or and as crazy as this sounds, it messes with the window operation, radio's sound, and power steering. Sounds like toy have a problem, with IAC or TPS.I have a 01 se ohv pushrod engine. When I shift sometimes from park to reverse or forward the idle goes down and sometimes dies. When running car runs smooth, no engine codes. I was told trans. range sensor. Car has 158,000. Repairs to date AC compressor, Alternator, camshaft synchronizer and camshaft position sensor. Also general maint.