Dodge RAM 1500 1998 Owner's Manual page 1856

DR
AUTOMATIC TRANSMISSION - 48RE (Continued)
CONDITION
NO 4-3 DOWNSHIFT
WHEN CONTROL SWITCH
IS TURNED OFF
CLUNK NOISE FROM
DRIVELINE ON CLOSED
THROTTLE 4-3
DOWNSHIFT
3-4 UPSHIFT OCCURS
IMMEDIATELY AFTER 2-3
SHIFT
WHINE/NOISE RELATED
TO ENGINE SPEED
POSSIBLE CAUSES
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.
1. Overdrive Solenoid Connector or
Wiring Shorted.
2. TPS Malfunction.
3. PCM Malfunction.
4. Overdrive Solenoid Malfunction.
5. Valve Body Malfunction.
1. Fluid Level Low.
2. Shift Cable Incorrect Routing.
AUTOMATIC TRANSMISSION - 48RE
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.
1. Test connector and wiring for loose
connections, shorts or ground and repair as
needed.
2. Test TPS and replace as necessary.
Check with DRB scan tool.
3. Test PCM with DRB scan tool and
replace controller if faulty.
4. Replace solenoid.
5. Remove, disassemble, clean and inspect
valve body components. Make sure all
valves and plugs slide freely in bores.
Polish valves with crocus cloth if needed.
1. Add fluid and check for leaks.
2. Check shift cable for correct routing.
Should not touch engine or bell housing.
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CORRECTION