Dodge RAM TRUCK 1500 1995 Service Manual page 1403

21 - 120 42RH/46RH/47RH TRANSMISSION DIAGNOSIS AND TESTING - B R
TRANSMISSION
DIAGNOSIS
CONDITION P O S S I B L E CAUSES
CORRECTION
SLIPS IN REVERSE ONLY
1. Low fluid level. 1. Add fluid and check for leaks.
2. Aerated fluid; see Slips in
Forward Drive Ranges.
2. See Slips in Forward Drive Ranges.
3. Gearshift linkage or cable out of
adjustment.
3. Adjust linkage/cable.
4. Rear band out of adjustment. 4. Adjust band.
5. Hydraulic pressure too low due
to worn pump, worn seal rings,
clutch or servo seal leakage.
5. Perform hydraulic pressure tests to
determine cause.
6. Worn front clutch, leaking rear
servo, or worn rear band.
6. Air pressure check clutch-servo operation
and repair as required.
7. B and-linkage binding. 7. Inspect and repair as required.
NO KICKDOWN OR
NORMAL DOWNSHIFT
1. Incorrect throttle cable
adjustment.
1. Adjust cable.
2. Incorrect gear shift linkage/cable
adjustment.
2. Adjust linkage/cable.
3. Front band out of adjustment. 3. Adjust band.
4. Hydraulic pressures too high
or too low due to sticking governor,
valve body malfunction, or
incorrect hydraulic control pressure
adjustments.
4. Perform hydraulic pressure tests to
determine cause and repair as required.
Correct valve body pressure adjustments
as required.
5. Front servo, band, or linkage
malfunction.
5. Air pressure test operation and repair
as necessary.
6. Clutch or servo malfunction. 6. Air pressure test operation and repair as
necessary.
STUCK IN LOW GEAR
(WILL NOT UPSHIFT)
1. Gearshift or throttle linkage or
cable of adjustment.
1. Adjust linkage. Repair linkage if worn
or damaged. Replace cable if damaged.
2. Front band out of adjustment. 2. Adjust band.
3. Governor valve stuck closed;
loose output shaft support or
governor housing bolts, worn
pump, leaking seal rings, or valve
body problem (i.e., stuck 1 -2
shift valve or governor plug).
3. Check line and governor pressures to
determine cause; correct as required.
4. Clutch or servo malfunction. 4. Air pressure check operation of
clutches and bands; repair faulty
component.
J9521-135