To turn off the TR switch, one has to engage the parking brake and move the shift lever to the NEUTRAL position. There should be a TR switch on top of the transaxle; then with the screwdriver or trim panel removal tool, prise the Heim joint off the TR switch lever by disconnecting the shift control cable from the TR switch lever. After that, unscrew the lock on the electrical connector of the TR switch and pull it off. Compact the TR switch lever nut by holding the lever with a large water pump pliers and then rotating the nut to become loose and then the lever is ejected. Then, if necessary, undo the TR switch mounting bolts to pull out the switch out of the transaxle. For installation, make sure the shift lever is still IN NEUTRAL, the flats on the transaxle shift shaft should engage the flats in the TR switch and just tighten the switch mounting bolts slightly. Position it using alignment fixture and then tighten switch mounting bolts to the torque specified by the company. At the end of the installation procedures, undo the process as explained above and tighten the TR switch lever nut by using water pump pliers in the right degree of torque.