Speedometer Drive Sensor Mounted on ML5T Transmission
Removing
1. Raise the front of the car and secure it on stands. Remove the mudguard from under the engine. The speedometer drive sensor is located on the rear of the transmission case near the inner end of the right drive shaft. Depending on the model, the speedometer can be driven by a cable or electrically.
2. On models with a speedometer cable drive, remove the pin and remove the speedometer cable. On models with an electric speedometer drive, disconnect the electrical connector.
3. Unscrew the mounting bolt together with the heat shield (where available).
4. Remove the speedometer drive sensor or speedometer drive gear assembly from the transmission case along with the O-ring.
5. If necessary, the gear can be removed from the housing and then the O-ring in the upper part of the housing can be replaced. Check gear for wear and replace if necessary.
6. If the driven gear is worn or damaged, the drive gear in the transmission case must be examined.
7. To remove the speedometer drive gear on the BE3 gearbox, remove the right drive shaft from the gearbox. Unscrew the three fixing screws.
8. Then remove the speedometer drive housing together with the O-ring. Remove the drive gear from the differential along with the shims.
Installation
1. Install the shims on the differential, then the speedometer drive gear, while aligning the mounting tabs (indicated by arrows). Install a new O-ring on the back of the speedometer drive housing, then reinstall the housing and bolt on. Install the drive shaft.
2. Lubricate the sealing lips of the O-ring and the driven shaft of the gear, and install the gear into the speedometer drive housing.
3. Install a new O-ring to the speedometer drive housing. Install the assembly on the gearbox.
4. Install the heat shield and secure with the bolt.
5. On models with an electric speedometer drive, connect the electrical connector. On models with speedometer cable, connect the speedometer cable.
6. Place a mudguard under the engine and lower the vehicle.