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CONDITION POSSIBLE CAUSES CORRECTION SLIPS IN OVERDRIVE 1. Fluid Level Low. 1. Add fluid and check for leaks. 2. Overdrive Clutch Pack Worn. 2. Remove overdrive unit and rebuild clutch 3. Overdrive Piston Retainer Bleed 3. Disassemble transmission, remove 4. Overdrive Piston or Seal 4. Remove overdrive unit. Replace seals if 5. 3-4 Shift Valve, Timing Valve or 5. Remove and overhaul valve body. 6. Overdrive Unit Thrust Bearing 6. Disassemble overdrive unit and replace 7. O/D Check Valve/Bleed Orifice 7. Check for function/secure orifice insert in DELAYED 3-4 UPSHIFT 1. Fluid Level Low. 1. Add fluid and check for leaks. 2. Throttle Valve Cable Misadjusted. 2. Adjust throttle valve cable. 3. Overdrive Clutch Pack Worn/ 3. Remove unit and rebuild clutch pack. 4. TPS Faulty. 4. Test with DRB scan tool and replace as 5. Overdrive Clutch Bleed Orifice 5. Disassemble transmission and replace 6. Overdrive Solenoid or Wiring 6. Test solenoid and check wiring for 7. Overdrive Excess Clearance. 7. Remove unit. Measure end play and 8. O/D Check Valve Missing or 8. Check for presence of check valve. TORQUE CONVERTER Lockup Solenoid, Relay or Wiring Test solenoid, relay and wiring for HARSH 1-2, 2-3, 3-4 OR Lockup Solenoid Malfunction. Remove valve body and replace solenoid 21 - 70 42RE AUTOMATIC TRANSMISSION WJ DIAGNOSIS AND TESTING (Continued) |