To replace the park/neutral position switch on the 4l60-e/4l65-e/4l70-e transmission, it starts by applying the park brake and shifting the transmission into neutral. If the vehicle is 4 wheeler, remove the front propeller shaft. Lift and appropriately support the car and remove the park/neutral position (PNP) switch electric connector . This will involve removing the nuts holding the manual shaft or lever and the nuts that hold the transmission control lever in place. Besides, removing the bolts and the pnp switch. If the pnp switch will not slide off easily, file the outer edge of the manual shaft to eliminate any burrs. For installation, line up the pnp switch with the manual shaft flats and slide on to the shaft, and allow it to contact the transmission bosses with mounting bracket. In the case of installing a new pnp switch, it will include a positive assurance bracket and hence there will be no need to use the park neutral switch aligner. Install the pnp switch bolts finger tight. Pnp refers to a polarized non-polarized connector, which is a connector in which the wire end needs to be inserted into the correct position when attaching the connector to its matching socket. Then install the j 41364-a park neutral switch aligner onto the pnp switch and make sure the slots to locate the tool tabs and rotates the tool until the upper locator pin is aligned with the switch slot. Tighten the bolts to 25 nm (18 ft. Lbs.) after which remove the j 41364-a and, if appropriate, positive assurance bracket. Replace the transmission control lever with the nut, which should be tightened to 25 nm (18 ft. Twin.) and reconnect pnp switch the electrical connectors of the switch. If equipped with 4wd, reinstall front propeller shaft, depress the vehicle, check switch (engine should only run in park (P) or neutral (N)), replace the switch if this fails to work properly.