Dodge RAM TRUCK 1500 1995 Service Manual page 1406

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— — 42RH/46RH/47RH TRANSMISSION DIAGNOSIS AND TESTING 21-123
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DIAGNOSIS
CONDITION
P O S S I B L E C A U S E S
OVERHEAT DURING
COMMERCIAL OPERATION
OR WHILE TRAILER
TOWING (FLUID DARK
AND BURNEDWITH SOME
SLUDGE FORMATION)
1. Vehicle not properly equipped
for trailer towing or commercial
use.
2. Vehicle not equipped with auxiliary
fluid cooler.
3. Extensive idling time or operation
in heavy traffic in hot weather.
4. Tow vehicle overloaded
(exceeding vehicle tow capacity).
5. Air flow to auxiliary cooler blocked
by snow plow, front mounted spare
tire, bug screen, or similar item.
1. Be sure vehicle is equipped with
recommended optional components (i.e.,
HD springs, transmission, axle, larger CID
engine, auxiliary cooler, correct axle ratio,
etc.). If vehicle is not so equipped, it should
not be used for severe service operation.
2. Drain fluid, change filter, and install
auxiliary cooler.
3. Cut down on idling time; shift into neutral
every so often and run engine at 1000 rpm
to help circulate fluid through cooler.
4. Be sure vehicle is properly equipped to
handle load; do not tow Class Ill-type loads
with a vehicle that is only rated for Class I
or II operation.
5. Remove or reposition item causing air
flow blockage.
OVERHEAT DURING
NORMAL OPERATION
(FLUID DISCOLORED,
SMELLS BURNED)
1. Low fluid level.
2. Fluid cooler, lines blocked, or
cooler cracked (oii in engine
coolant).
3. Switch valve sticking.
4. Clutch pack clearance incorrect
(too tight).
5. Bands too tight.
1. Add fiuid and check for leaks.
2. Flush cooler and lines and replace ;
radiator if transmission fluid has entered j
coolant.
3. Remove, disassemble, clean valve body.
4. Check and correct as required.
5. Adjust bands.
NO START IN PARK
OR NEUTRAL
1. Gearshift linkage or cable out of
adjustment.
2. Neutral switch wire broken or
open.
3. Faulty park/neutral position
switch.
4. Valve body manual lever
assembly bent, worn, broken, or
not aligned with switch.
1. Adjust linkage or cable.
2. Check continuity with test lamp; repair as
required.
3. Refer to service section for test and
replacement procedure.
4. Inspect lever assembly and replace if
damaged.
SLUGGISH ACCELERATION
AT LOW SPEEDS OR
REQUIRES E X C E S S I V E
THROTTLE OPENING TO
MAINTAIN HIGHWAY
S P E E D S
1. Poor engine performance.
2. Gearshift or throttle linkage/cable
out of adjustment.
3. Transmission clutches slipping.
4. Overrunning clutch in converter
not holding.
5. Converter overrunning clutch stuck.
1. Check engine and repair as required.
2. Adjust linkage/cable.
3. Perform stall test and repair as required.
4. Perform stall test and repair converter if
clutch has failed.
5. Replace converter.
J9521-138