Grand Cherokee 2WD V8-318 5.2L VIN Y MFI (1994)
Transmission Speed Sensor: All Technical Service Bulletins
M/T Speed Sensor - Oil Leak
NO: 21-14-94
GROUP: Transmission
DATE: Aug. 19, 1994
SUBJECT:
Speed Sensor Oil Leakage
MODELS:
1993 - 1994
(AB)
Ram Van/Wagon
1993
(AD)
Ram Pickup/Ram Cab & Chassis
1994
(AN)
Dakota/Dakota Cab & Chassis
1994
(BR)
Ram Pickup
1993 - 1994
(XJ)
Cherokee
1992 - 1994
(YJ)
Wrangler
1993 - 1994
(ZJ)
Grand Cherokee
NOTE:
THIS BULLETIN DOES NOT APPLY TO "AD" MODEL VEHICLES WHICH ARE EQUIPPED WITH A 5.9L CUMMINS DIESEL AND
GETRAG TRANSMISSION, NOR VEHICLES WITH A MODEL 205 HEAVY DUTY TRANSFER CASE.
SYMPTOM/CONDITION:
Transmission fluid leakage may occur in the area of the speed sensor. This condition may be due to transmission fluid leakage at the o-ring seal located
between the speed sensor housing and speedometer adapter. Transmission fluid may also wick through the electrical connector on the speed sensor and
leak into the attaching electrical harness connector.
DIAGNOSIS:
1.
Inspect for transmission fluid leakage through the electrical connection of the speed sensor or between the speed sensor housing and speedometer
adapter.
2.
If transmission fluid is present, then proceed with the repair procedure.
PARTS REQUIRED:
1.
56027825 Speed sensor
REPAIR PROCEDURE:
This bulletin involves the replacement of the vehicle speed sensor.
1.
Raise the vehicle.
2.
Disconnect the speed sensor electrical connector.
3.
Remove the bolt which attaches the speed sensor to its adapter. Remove the speed sensor from the adapter.
4.
Clean the adapter mating surface.
5.
Install the new speed sensor. Tighten the attaching bolt to 2 - 3 N-m (15 - 27 in.lbs.).
6.
Inspect the electrical harness connector for dirty or oxidized pins. Clean as required.
7.
Remove any oil residue from the sensor and harness mating electrical connectors.
WARNING:
USE A CLEANER THAT IS COMPATIBLE WITH PLASTIC ELECTRICAL COMPONENTS. USE OF MOPAR'S "CHLORINATED" BRAKE
PART CLEANER (P/N 4318037) IS ACCEPTABLE. DO NOT USE "NONCHLORINATED" BRAKE CLEANERS, INCLUDING MOPAR'S, TO
CLEAN PLASTIC COMPONENTS.
