This time I have a Tranny Problem

that part will NOT prevent the unit going into park

it will, however, cause such problems as the unit unexpectedly dropping from

this also a big problem on the FWD cars, water splashes up, the hot exhaust turns it to steam, and it penetrates the switch, causing erratic resistance that the ECM reads as a differnt gear (the TRS does NOT use discrete contacts/wires, but is a resistance-switched unit that gives a different resistance reading to the ECM for each gear............simple in theory, but theory didn't account for real-world, under-the-hood conditions)