GM 15027967
Clutch Switch

Service and repair procedures for the Neutral Safety Switch of the 4l60-e/4l65-e transmission start after applying the park brake and switching the transmission into neutral position. Start by removing the front propeller shaft when your vehicle has 4-wheel drive (4WD). Support the vehicle properly and unplug all park/neutral position (PNP) switch electrical connectors from their corresponding ports. Start by removing the manual shaft lever nut and then extract its transmission control lever from the manual shaft. Start by removing pnp switch bolts to extract pnp switch from the manual shaft. Manually file away burrs on the manual shaft outer side if the component fails to slide off without resistance. Install the pnp switch by positioning it on the transmission manual shaft with attention to align both sets of flats between the hub and manual shaft then push it forward until the mounting bracket touches the transmission bosses. The use of j 41364-a park neutral switch aligner becomes unnecessary when installing a new pnp switch because the switch comes with an integrated positive assurance bracket. Finger-tighten the pnp switch bolts before applying the park neutral switch aligner (J 41364-A) onto the switch. The two slots on the switch should match the lower tabs on the tool. Tighten the bolts to 25 nm (18 ft. Lbs.) by rotating the tool until the upper locator pin rests precisely on the slot found on top of the switch. Next, remove the park neutral switch aligner (J 41364-A) followed by any positive assurance bracket that might be in place. Install the transmission control lever onto the manual shaft by using the nut and torque it to 25 nm (18 ft. Lbs.) before reattaching the pnp switch electrical connectors. Check the switch operation while lowering the vehicle by reinstalling the front propeller shaft for 4wd systems ensuring the motor starts only when the vehicle is in park (P) or neutral (N). The system requires replacement of the switch when it fails to work correctly.

To replace the park/neutral position switch on the 4 l 80- e/4l 85- e transmission, start by using the park motor to take the selection to the neutral and then park and apply the park. If the car is four-wheel drive (4WD), the front propeller shaft should be removed. Lift and adequately support the vehicle, then remove park/neutral position (PNP) switch electrical connectors. Then remove range selector end from the range selector lever ball stud, control lever to the manual shaft nut, and remove the range selector control lever from the manual shaft nt. Next, remove the pnp switch bolts and pull the pnp switch off the manual shaft; if it does not slide out easily, file the outer edge of the manual shaft to remove burrs. Removal is also easy: it is enough to remove a switch from a shaft and at the same time remove the mounting bracket from transmission bosses. In the case where a new pnp switch will be wired, it will have a positive assurance bracket attached to it, thus rendering the need of a park neutral switch aligner redundant. Mount the pnp switch bolts with with finger tight tension, then hold the connecting tool, j 41364-a park neutral switch aligner (J 41364-A) on the pnp switch ensuring that the two slots on the switch fall in the lower tabs of the tool. Turn the j 41364-a in both ways to place the upper locator pin into the slot on the top of the switch then tighten the bolts to 25 nm (18 ft. Lbs.). Take off the j 41364-a from the pnp switch and, if necessary, remove the positive assurance bracket. Replace the control lever on the manual shaft with the nut (torque to 25 Nm or 18 ft. Lbs.), mount the end of the range selector cable to the ball stud of the range selector lever, and connect the pnp switch electrical connections. Instead if four wd, reinstall front pro retier shaft, lower the veh, verify the pnp switch so that it will work properly, engine will start only in the park (P) or neu tral (N). If it doesn't, then replace switch.

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.

The first step when replacing a park/neutral position switch is to engage parking brake and place transmission in neutral position. Raising the vehicle enables workers to remove a retaining nut from the transmission control lever while also removing the manual shaft's transmission control lever. First remove the electrical connectors from the switch then unscrew and disconnect the bolts that attach the park/neutral position switch to the transmission before extracting the switch from the manual shaft. Use sanding paper to file down the manual shaft exterior when the switch shows resistance to removal. The installation process requires placing switch hub flats in alignment with manual shaft flats while moving the switch onto the shaft until the mounting bracket touches transmission bosses. A newly purchased switch already includes its own positive assurance bracket which bypasses the requirement for using a neutral position adjustment tool. After installing the switch to the transmission with loose bolts, use the j 41364-a park/neutral switch aligner (J 41364-A) to place it onto the switch while checking that the slots match the tool's tabs. Use the tool to turn it so the upper locator pin reaches the slot on the switch then tighten its bolts to 25 nm (18 ft. Lbs.). Take out the j 41364-a then eliminate the positive assurance bracket if it is attached. Reconnect electrical connectors to the switch before installing transmission control lever to manual shaft with the nut; then torque the control lever nut to 25 nm (18 ft. Lbs.). Check the switch operation by lowering the vehicle while ensuring the engine can start exclusively when the vehicle is placed in p (Park) or n (Neutral). Replacement of the device arises when the switch fails to function correctly.

Begin the replacement of a 4l60-e transmission's park neutral position switch by applying the parking brake while shifting into neutral position. Begin by standing vehicle off the ground and remove the bolt holding the transmission control lever to the manual shaft. Afterward take away the transmission control lever. Begin by disconnecting the electrical wires from the switch then remove hardware securing the park/neutral position switch to the transmission before finally removing the switch from the manual shaft. You should use a file to smooth the outer manual shaft to remove burrs if the switch remains difficult to slide off. Place the switch hub flats parallel to the manual shaft flats then push the switch along the manual shaft until the mounting bracket touches the transmission's mounting bosses. A newly installed switch will come equipped with a positive assurance bracket so the neutral position adjustment tool becomes redundant for installation. Use two bolts to install the switch onto the transmission at finger-tight torque before placing the neutral position adjustment tool (J 41364-A) on the switch and lining up its slot positions with tool tabs. Tighten the bolts to a torque setting of 25 nm (18 ft. Lbs.) after rotating the tool to position its upper locator pin into the switch slot. Take out the tool together with the positive assurance bracket if present. After hooking up power connectors to the switch, mount and lock the transmission control lever onto the manual shaft with its nut at 25 nm torque (18 ft. Lbs.). Check the vehicle's engine startup capability by lowering it to confirm that the engine operates only in p (Park) or n (Neutral) positions before completing the test. Exchange the switch whenever it fails to function properly.

Starting to replace a 4l80-e transmission's park/neutral position switch requires applying the parking brake followed by positioning the transmission into neutral. Start by elevating the vehicle before you remove the nut connecting the transmission control lever to the manual shaft then disconnect the transmission control lever. Begin by disconnecting the electrical connectors from the switch then use a wrench to remove mounting bolts holding the park/neutral position switch to the transmission before taking the switch off the manual shaft. To remove burrs from the outer manual shaft edge simply use a file tool. To install the switch slide its hub flats to match the manual shaft flats then shift it onto the shaft until the mounting bracket reaches the transmission's mounting bosses. New switches arrive with built-in positive assurance brackets to do away with the requirement for a neutral position adjustment tool during installation. Next, position the neutral position adjustment tool (J 41364-A) on the switch so its slots match with the tool's tabs and then tighten the two mounting bolts on the transmission finger tight. Tighten both bolts to 25 nm (18 ft. Lbs.) after you rotate the tool until the upper locator pin lines up with the switch's slot. Take out the tool along with any positive assurance bracket if it exists. Tighten the electrical connectors to the switch before putting the transmission control lever onto the manual shaft and securing it with a nut to 25 nm torque (18 ft. Lbs.). After lowering the vehicle check that the switch functions correctly by ensuring the engine starts only when placed in positions p (Park) or n (Neutral). The switch requires replacement when it fails to function properly.

First detach the external wiring harness from the pnp switch along with the shift linkage/cable from the shift lever which is affixed to the selector shaft. Start by using wrench to lock down the shift lever before removing nut which secures the selector shaft end. Slowly extract the shift lever . Two bolts must be removed before moving the pnp switch outward over the selector shaft. Install the neutral assurance bracket onto pnp switch so installation can begin and establish the selector shaft in n (Neutral) with clockwise rotation to maximum position followed by two counter-clockwise detents. Lay the pnp switch in position against the main housing so neutral assurance bracket extends to the front and push it onto the selector shaft keeping everything correctly aligned. Tighten the two bolts to 27 nm (20 ft. Lbs.) through which the pnp switch will rotate with resistance. Discard the neutral assurance bracket while avoiding either driving the selector lever onto the selector shaft or using an impact wrench to tighten the selector lever nut. Clamp the lever with a wrench before applying torque to the nut up to 24 nm (18 ft. Lbs.). Perform the following sequence for return to service: install the shift lever followed by shift selector linkage/cable and pnp switch wiring external connector.

A transmission position switch/sensor repair or service starts by engaging the parking brake and moving the transmission to neutral position. Lift the vehicle and disconnect the nut which holds the transmission control lever to the manual shaft before removing the lever entirely. To disconnect the wiring harness connector do it at a point close to the vehicle harness so you don't break the park neutral position switch lead connector. After removing the bolts that hold the park/neutral position switch to the transmission you can extract the switch from the manual shaft. Use a file to trim any rough edges from the manual shaft outer surface when the switch refuses to move off. Position the switch on the transmission manual shaft by matching the switch hub flats to manual shaft flats while allowing the switch mounting bracket to touch the transmission bosses before tightening two bolts for installation. The switch must receive two bolts for fastening but these bolts should remain loose. The tool (J41364-a) needs to be positioned across the park/neutral position switch so its two slotted sections match with the tool's lower tabs. After positioning the tool's upper locator pin into the slot found on top of the switch, proceed to tighten the securing bolts to 25 nm (18 ft. Lbs.). Disconnect tool j41364-a first before restoring wiring connector connections to the vehicle harness. Secure the transmission control lever onto the manual shaft by threading the nut until torque reaches 25 nm (18 ft. Lbs.). Roll down the vehicle and verify switch function while testing its ability to start the engine only when the shift lever is in p (Park) or n (Neutral), making changes to the settings if needed.

Before changing the Manual Shift Shaft, Detent Lever, and Position Switch Assembly on an Allison Automatic Transmission, first take off the control valve assembly from the transmission. Take out the detent lever/IMS retaining bolt with a T27 TORX(r) bit and get rid of it because threads are treated with patch lock material. Make sure you do not damage the transmission case surface or twist the pin while taking out the spherical pin. Put a protective plate on the pin before you take it out. Put the manual shift shaft through the detent lever/IMS assembly and the manual shift shaft seal, then rotate the detent lever/IMS assembly so you can remove the park pawl apply assembly. When installing, put the new detent lever/IMS assembly into the transmission case, line up the park pawl apply assembly with the slot, and reinstall the manual shift shaft . Make sure the manual shift shaft is all the way in, install Reattach the control valve assembly last, then use a scan tool to do FastLearn and make sure the TCM has the correct adaptive values for the new parts.

To replace the park/neutral position switch from a 4l80-e automatic transmission, one would have first applied the parking brake and shifted the transmission to neutral. Lift up the vehicle and remove the nut holding the transmission control lever in place with the manual shaft and remove the control lever. Important: remove the connector of the wiring harness at a location close to the vehicle harness to prevent breaking the panel neutral position switch lead connector. Then, pull out the wiring harness connector, remove the two screws that hold the park/neutral position switch to the trans, and remove the switch from the manuel shaft. Alternatively in case the switch does not slide off easily, file the outer edge of the manual shaft in order to eliminate burrs on it. For installation, align the switch hub flats with the manual shaft flats and install the switch until the mounting bracket contacted the transmission bosses. Tighten up to two bolts without making them tight. Place the j 41364-a park neutral switch aligner (J 41364-A) onto the switch, with the correct alignment of the slots and the tabs on the tool. Rotate the tool to allow the upper locator pin to go into the slot in the switch, tighten the bolts to 25 nm (18 ft. Lbs.), 25 nm). Delete the j 41364-a, reconnect the vehicle wire harness, and reinstall the transmission control lever with the nut, ensuring a compression of 25 nm (18 ft. Lbs.). Reduce the vehicles and examine that switch work effectively, that the engine starts once the car is in the p (Park) or n (Neutral) positions. If the switch is not being operated as intended, make the necessary changes.

The first step to replace the park/neutral position switch on 4l80-e/4l85-e transmissions requires using the park brake and shifting into the neutral position. The removal of the front propeller shaft must occur before beginning work because the vehicle includes 4-wheel drive. Follow these steps to replace the park/neutral position (PNP) switch electrical connector and remove the range selector cable end from the range selector lever ball stud. Begin by taking out the control lever and manual shaft nut before you remove the control lever from the manual shaft, pnp switch bolts, and pnp switch from the transmission. File the outer manual shaft perimeter to eliminate burrs since the pnp switch fails to detach from the manual shaft. Align the pnp switch against manual shaft flats before sliding it onto the manual shaft keeping the switch mounting bracket against the transmission mounting bosses. If a new pnp switch is being installed, it will come with a positive assurance bracket, making the use of the park neutral switch aligner unnecessary; secure the pnp switch bolts only until they reach finger-tightness. Position the j 41364-a park neutral switch aligner (J 41364-A) on the pnp switch with the tool's lower tabs inserted into each slot of the switch. Adjust the j 41364-a to line up its top locating pin with the switch opening while tightening fasteners to 25 nm (18 ft. Lbs.). Cut off the j 41364-a from pnp switch and remove positive assurance bracket if present. Install the control lever to the manual shaft with the nut, tightening it to 25 nm (18 ft. Lbs.)the range selector cable end should be fitted to the range selector lever ball stud before connecting the pnp switch electrical connector. If equipped with 4wd, reinstall the front propeller shaft, lower the vehicle, and check the pnp switch for proper operation, ensuring the engine starts only in the park (P) or neutral (N) positions; install a new switch when the defective unit shows improper functioning.

Disconnect the PNP switch electrical connector.

If the vehicle has 4WD, reinstall the front propeller shaft, lower the vehicle, and check the switch for proper operation.

Ensure the slots on the switch align with the lower tabs on the tool, then rotate the tool until the upper locator pin aligns with the slot on the top of the switch.

Check the switch for proper operation, ensuring the engine starts only in the park (P) or neutral (N) positions; if it does not operate correctly, replace the switch.

File the outer edge of the manual shaft to remove any burrs.

Position the Park Neutral Switch Aligner (J 41364-A) onto the PNP switch and ensure the slots align with the lower tabs on the tool.

Rotate the tool until the upper locator pin aligns with the slot on the top of the switch, and tighten the bolts to 25 Nm (18 ft. lbs.).

Reinstall the control lever to the manual shaft with the nut and tighten it to 25 Nm (18 ft. lbs.).

Remove the tool and, if applicable, the positive assurance bracket.

Align the PNP switch with the manual shaft flats and slide it onto the shaft until the switch mounting bracket contacts the transmission mounting bosses.