REMOVAL & INSTALLATION
31TH Automatic Transaxle
See Figure 1
- Disconnect the negative battery cable.
- Raise and safely support the vehicle. Position a drain pan under the switch.
- Disconnect the switch electrical connector.
- Remove the switch from the case.
- Verify that the switch operating lever fingers are centered in the switch opening in the case when in P and N .
- Install a new seal and screw the switch on the case. Tighten to 24 ft. lbs. (33 Nm). Be sure the new seal has seated properly between the switch and the transaxle housing or a fluid leak could result.
- Check the continuity of the switch, at the 2 outer terminal pins, for proper operation. Reconnect the electrical connector.
- Lower the vehicle and check the transmission fluid level. Add if necessary.
- Reconnect the negative battery cable and check the switch for proper operation.
See Figures 2, 3 and 4
Vehicles equipped with this transaxle do not utilize a conventional neutral safety switch or back-up light switch. Instead, this automatic transaxle is equipped with a Transaxle Range Sensor (TRS), which is located on top of the valve body, within the transaxle assembly. This sensor performs the functions of the neutral safety and back-up light switches. To remove the sensor, the transaxle fluid pan and valve body must be removed.
The TRS, if defective, must be removed with the transaxle's valve body as an assembly. The TRS is mounted on the top side of the valve body.
- Disconnect the negative battery cable.
- Remove the air cleaner assembly.
- Disconnect the gear shift cable.
- Remove the manual valve lever.
- Unplug the transaxle range sensor's electrical connector.
- Raise and safely support the vehicle.
- Place a drain pan, with a large opening, under the transaxle oil pan. Loosen the transaxle oil pan mounting bolts and tap the oil pan at one corner to break it loose, allowing the fluid to drain. After the fluid has drained, remove the transaxle oil pan.
- Remove the transaxle oil filter while allowing the residual transaxle fluid to fully drain.
- Remove the mounting bolts for the valve body.
- Separate the Park rod from the guide bracket and remove the valve body assembly from the transaxle.
- Place the valve body assembly on a workbench.
- Remove the TRS attaching screw.
- Remove the manual shaft seal and slide the TRS up the manual shaft to remove it from the valve body.
- Install the TRS by sliding it down onto the manual shaft.
- Install the manual shaft seal halfway down onto the manual shaft, and seat it in the shaft seal groove.
- Install and tighten the TRS retaining screw to 45 inch lbs. (5 Nm).
- Install the valve body assembly up into the transaxle. Engage the Park rod into the guide bracket.
- Install and tighten the valve body mounting bolts to 105 inch lbs. (12 Nm).
- Install a new transaxle oil filter and O-ring.
- Before installing the transaxle oil pan, be sure to thoroughly clean the gasket mating surfaces of the transaxle case and transaxle oil pan, as well as the pan magnet. Then, place a light bead of RTV sealer on the oil pan gasket surface. Properly position the new pan gasket on top of the pan gasket mating surface.
- Position the transaxle oil pan onto the transaxle case and install the pan mounting bolts. Tighten the oil pan mounting bolts.
- Lower the vehicle.
- Plug in the transaxle range sensor's electrical connector.
- Install the manual valve lever and reconnect the gear shift cable.
- Install the air cleaner assembly.
- Pour 4 quarts of MOPAR® ATF PLUS Type 7176 or equivalent ATF into the transaxle filler tube.
- Connect the negative battery cable.
- Start the engine and allow it to idle for at least one minute. Apply both the parking and service brakes. Move the gear shift selector momentarily through each gear position, ending up in the P or N position.
- Check the fluid level, while the engine is running and, if necessary, add sufficient fluid to bring to the correct level.
- Road test the vehicle.
The neutral starting/back-up light switch and the transaxle range sensor are both non-adjustable components.