Dodge RAM TRUCK 1500 1995 Service Manual page 1410

B R
42RH/46RH/47RH TRANSMISSION DIAGNOSIS AND TESTING 2 1 - 1 2 7
O V E R D R I V E DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
HARSH 1-2, 2-3, OR 3-2
SHIFTS
1. Converter clutch solenoid failure. 1. Remove valve body and replace solenoid.
TORQUE CONVERTER
LOCKS UP IN SECOND
AND/OR THIRD GEAR (A500)
1. Converter clutch solenoid, relay,
or wiring problem.
1. Test solenoid, relay, and wiring for
continuity, shorts, or grounds; replace
solenoid and relay if faulty; repair wiring and
connectors as necessary.
NOISY OPERATION IN
FOURTH GEAR ONLY
1. Overdrive clutch discs, plates,
or snap rings damaged.
2. Overdrive piston or planetary
thrust bearing brinnelled, installed
wrong, or damaged.
3. Output shaft bearings brinnelled,
scored, damaged.
4. Planetary gears worn, chipped,
damaged.
5. Overdrive unit overrunning clutch
rollers rough, scored, or output
bushings are worn.
1. Remove unit and rebuild clutch pack.
2. Remove and disassemble unit; replace
either thrust bearing if damaged.
3. Remove and disassemble unit; replace
either bearing if damaged.
4. Remove and overhaul overdrive unit.
5. Remove and overhaul overdrive unit.
NO REVERSE (OR SLIPS
IN REVERSE)
1. Direct clutch spring collapsed or
broken.
2. Direct clutch pack worn.
3. Rear band out of adjustment.
4. Front clutch malfunction.
5. Overdrive thrust bearing failure.
1. Remove and disassemble unit; check
clutch pack and replace spring.
2. Disassemble unit and rebuild clutch pack.
3. Adjust band.
4. Air pressure test clutch operation; remove
and rebuild if necessary.
5. Disassemble geartrain and replace
bearings.
NO 1-2 OR 2-3 UPSHIFT
(HAS LOW AND REVERSE
ONLY)
1. Governor component loose,
worn, or damaged.
1. Remove and disassemble unit; replace •
worn or damaged governor components
as needed.
J9521-142