Dodge 2001 Ram 1500 Owner's Manual page 2133

21 - 498 AUTOMATIC TRANSMISSION - 46RE
AUTOMATIC TRANSMISSION - 46RE (Continued)
CONDITION
DRAGS OR LOCKS UP
NO 4-3 DOWNSHIFT
NO 4-3 DOWNSHIFT
WHEN CONTROL SWITCH
IS TURNED OFF
CLUNK NOISE FROM
DRIVELINE ON CLOSED
THROTTLE 4-3
DOWNSHIFT
POSSIBLE CAUSES
1. Fluid Level Low.
2. Clutch Dragging/Failed
3. Front or Rear Band Mis-adjusted.
4. Case Leaks Internally.
5. Servo Band or Linkage
Malfunction.
6. Overrunning Clutch Worn.
7. Planetary Gears Broken.
8. Converter Clutch Dragging.
1. Circuit Wiring and/or Connectors
Shorted.
2. PCM Malfunction.
3. TPS Malfunction
4. Lockup Solenoid Not Venting.
5. Overdrive Solenoid Not Venting.
6. Valve Body Valve Sticking.
1. Control Switch Open/Shorted.
2. Overdrive Solenoid Connector
Shorted.
3. PCM Malfunction.
4. Valve Body Stuck Valves.
1. Transmission Fluid Low.
2. Throttle Cable Mis-adjusted.
3. Overdrive Clutch Select Spacer
Wrong Spacer.
CORRECTION
1. Check and adjust level.
2. Air pressure check clutch operation and
repair as required.
3. Adjust bands.
4. Check for leakage between passages in
case.
5. Air pressure check servo operation and
repair as required.
6. Remove and inspect clutch. Repair as
required.
7. Remove, inspect and repair as required
(look for debris in oil pan).
8. Check for plugged cooler. Perform flow
check. Inspect pump for excessive side
clearance. Replace pump as required.
1. Test wiring and connectors with test lamp
and volt/ohmmeter. Repair wiring as
necessary. Replace connectors and/or
harnesses as required.
2. Check PCM operation with DRB scan
tool. Replace PCM only if faulty.
3. Check TPS with DRB scan tool at PCM.
4. Remove valve body and replace solenoid
assembly if plugged or shorted.
5. Remove valve body and replace solenoid
if plugged or shorted.
6. Repair stuck 3-4 shift valve or lockup
timing valve.
1. Test and replace switch if faulty.
2. Test solenoids and replace if seized or
shorted.
3. Test with DRB scan tool. Replace PCM
if faulty.
4. Repair stuck 3-4, lockup or lockup timing
valve.
1. Add Fluid.
2. Adjust cable.
3. Replace overdrive piston thrust plate
spacer.
BR/BE