Speedometer How to Install the Oil Seal Mechanical/Magnetic

How to Remove the Oil Seal Mechanical/Magnetic Speedometer

Special Instructions

Prior to replacing the seal, carefully inspect the transmission to make sure the oil leakage is coming from the seal. Pay particular attention to the gasketed surfaces of the rear bearing cover, rear countershaft bearing covers, and shift bar housing.

For additional Information on rear seal service, refer to the “Seal Maintenance Guide” TCSM-0912.

Special Tools

• Output Yoke Puller T1

1. Bushing 2. Rear Bearing Cover Assembly 3. Capscrew 4. Speedometer Drive Gear 5. Oil Seal with Slinger 6. O-Ring 7. Speedometer Spacer Assembly 1. Rear Bearing Cover 2. Sensor Retaining Capscrew 3. O-Ring 4. Speedometer Sensor 5. Capscrew 6. Oil Seal 7. Slinger 8. O-Ring 9. Speedometer Spacer Assembly 10. Slinger

Procedure -

1. Disconnect the driveshaft and U-joint from the output yoke according to the OEM or driveshaft manufacturer’s instructions.

2. Shift the transmission into 1st gear or low gear or use a yoke holding tool to prevent the output yoke from turning when you loosen the output yoke nut.

3. Remove the output yoke nut using a 70 mm or 2 3/4” socket.

4. Remove the output yoke. Use an output yoke puller (Tool ref.

ID T1). a. For Magnetic Speedometers: Remove the speedometer sensors from the rear bearing cover TIP: If the sensor is a thread in type, note the number of threads exposed so that the sensor can be reinstalled to the same depth. If the sensor is a push in type, remove the hold down capscrew and pull the sensor out of the bore. Remove the speedometer rotor/seal sleeve and the Oring. b. For Mechanical Speedometers: Remove the seal sleeve and O-ring

5. For transmissions with magnetic speedometers, pry the seal out as shown using a large screwdriver or prybar in the metal groove of the seal. For transmissions with mechanical speedometers, use a slide hammer with a hook attachment to remove the seal.

Note: The seal will be damaged during removal and must be replaced.

6. Remove seal slinger from the speedometer rotor/seal sleeve using a brass drift and hammer.Remove seal slinger from the speedometer rotor/seal sleeve using a brass drift and hammer.

7. Inspect all parts of the oil seal according to the instructions in the “General Service Practices” section of the manual. 9

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