Dodge RAM 1500 1998 Owner's Manual page 1851

21 - 148 AUTOMATIC TRANSMISSION - 48RE
AUTOMATIC TRANSMISSION - 48RE (Continued)
CONDITION
NO DRIVE OR REVERSE
(VEHICLE WILL NOT
MOVE)
SHIFTS DELAYED OR
ERRATIC (SHIFTS ALSO
HARSH AT TIMES)
POSSIBLE CAUSES
1. Fluid Level Low.
2. Gearshift Linkage/Cable
Loose/Misadjusted.
3. U-Joint/Axle/Transfer Case
Broken.
4. Filter Plugged.
5. Oil Pump Damaged.
6. Valve Body Malfunctioned.
7. Transmission Internal Component
Damaged.
8. Park Sprag not Releasing - Check
Stall Speed, Worn/Damaged/Stuck.
9. Torque Converter Damage.
1. Fluid Level Low/High.
2. Fluid Filter Clogged.
3. Throttle Linkage Mis-adjusted.
4. Throttle Linkage Binding.
5. Gearshift Linkage/Cable
Mis-adjusted.
6. Clutch or Servo Failure.
7. Governor Circuit Electrical Fault.
8. Front Band Mis-adjusted.
9. Pump Suction Passage Leak.
CORRECTION
1. Add fluid and check for leaks if drive is
restored.
2. Inspect, adjust and reassemble linkage
as needed. Replace worn/damaged parts.
3. Perform preliminary inspection procedure
for vehicle that will not move. Refer to
procedure in diagnosis section.
4. Remove and disassemble transmission.
Repair or replace failed components as
needed. Replace filter. If filter and fluid
contained clutch material or metal particles,
an overhaul may be necessary. Perform
lube flow test. Flush oil. Replace cooler as
necessary.
5. Perform pressure test to confirm low
pressure. Replace pump body assembly if
necessary.
6. Check and inspect valve body. Replace
valve body (as assembly) if any valve or
bore is damaged. Clean and reassemble
correctly if all parts are in good condition.
7. Remove and disassemble transmission.
Repair or replace failed components as
needed.
8. Remove, disassemble, repair.
9. Inspect and replace as required.
1. Correct fluid level and check for leaks if
low.
2. Replace filter. If filter and fluid contained
clutch material or metal particles, an
overhaul may be necessary. Perform lube
flow test.
3. Adjust linkage as described in service
section.
4. Check cable for binding. Check for return
to closed throttle at transmission.
5. Adjust linkage/cable as described in
service section.
6. Remove valve body and air test clutch,
and band servo operation. Disassemble
and repair transmission as needed.
7. Test using DRB scan tool and repair as
required.
8. Adjust band.
9. Check for excessive foam on dipstick
after normal driving. Check for loose pump
bolts, defective gasket. Replace pump
assembly if needed.
DR