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CONDITION POSSIBLE CAUSES CORRECTION NO 4-3 DOWNSHIFT 1. Control Switch Open/Shorted. 1. Test and replace switch if faulty. 2. Overdrive Solenoid Connector 2. Test solenoids and replace if seized or 3. PCM Malfunction. 3. Test with DRB T scan tool. Replace PCM if faulty. 4. Valve Body Stuck Valves. 4. Repair stuck 3-4, lockup or lockup timing CLUNK NOISE FROM 1. Transmission Fluid Low. 1. Add Fluid. 2. Throttle Cable Mis-adjusted. 2. Adjust cable. 3. Overdrive Clutch Select Spacer 3. Replace overdrive piston thrust plate 3-4 UPSHIFT OCCURS 1. Overdrive Solenoid Connector or 1. Test connector and wiring for loose 2. TPS Malfunction. 2. Test TPS and replace as necessary. T scan tool. 3. PCM Malfunction. 3. Test PCM with DRB T scan tool and replace controller if faulty. 4. Overdrive Solenoid Malfunction. 4. Replace solenoid. 5. Valve Body Malfunction. 5. Remove, disassemble, clean and inspect WHINE/NOISE RELATED 1. Fluid Level Low. 1. Add fluid and check for leaks. 2. Shift Cable Incorrect Routing. 2. Check shift cable for correct routing. WG AUTOMATIC - 44RE 21s - 59 AUTOMATIC - 44RE (Continued) 2001 JEEP GRAND CHEROKEE |