Dodge RAM TRUCK 1500 1995 Service Manual page 1400

B R — 42RH/46RH/47RH TRANSMISSION DIAGNOSIS AND TESTING 21-117
TRANSMISSION DIAGNOSIS
CONDITION
P O S S I B L E CAUSES CU^RECTIOW
HARSH ENGAGEMENT
(FROM NEUTRAL TO
DRIVE OR REVERSE).
N O T E : T h e shift from neutral to
reverse is normally quite firm.
Hydraulic pressure at the rear servo
c a n approach 300 psi in reverse
gear. Do not confuse a firm
e n g a g e m e n t with a truly harsh
e n g a g e m e n t .
1. Engine idle speed too
high.
2. Driver "riding" accelerator pedal
during shift.
3. Throttle cable or linkage
misadjusted.
4. Band adjustment needed.
5. Loose mounting bolts.
6. Worn or damaged U-joints.
7. Loose axle pinion nut.
8. Hydraulic pressure is incorrect.
9. Accumulator piston spring, or
or seal worn or damaged.
10. Faulty converter clutch if
equipped.
11. Clutch, band, or planetary
component is damaged.
1. Check/adjust idle speed.
2. Advise owner/operator.
3. Adjust cable or linkage; setting is either \
too long or too short.
4. Adjust front/rear bands.
5. Check engine, transmission, propeller
shaft, crossmember, and axle bolt torque;
tighten loose bolts and replace missing
bolts.
6. Remove propeller shaft and replace
U-joints.
7. Replace nut and check pinion threads
before installing new nut; replace pinion
gear if threads are damaged.
8. Check pressures; remove, overhaul, or
adjust valve body as needed; repair oil
pump if necessary.
9. Remove valve body and replace piston,
seal, or spring as needed.
10. Replace converter and flush cooler and
lines before installing new converter.
11. Remove, disassemble, and repair
transmission as necessary.
DELAYED ENGAGEMENT
(FROM NEUTRAL TO
DRIVE OR REVERSE)
1. Engine idle speed
too low.
2. Low fluid level.
3. Gearshift cable or linkage out of
adjustment.
4. Rear band out of adjustment.
5. Valve body filter plugged.
6. Oil pump gears worn or
damaged or pump body or seal
is damaged, allowing pump to
take in air, causing fluid aeration.
7. Reaction shaft seal rings worn
or broken.
8. Governor valve stuck or valve
shaft is loose or damaged.
9. Low hydraulic pressure.
10. Clutch, band, or servo damage.
1. Adjust idle speed.
2. Correct level and check for leaks.
3. Adjust cable or linkage, or repair as
needed.
4. Adjust band.
5. Replace fluid and filter. If oil pan and old
fluid were full of clutch disc material and/or
metal particles, overhaul will be necessary.
6. Remove transmission and replace oil
pump.
7. Remove transmission, remove oil pump,
and replace seal rings.
8. Remove and inspect governor
components; replace worn or damaged
parts.
9. Perform pressure test, remove
transmission, and repair as needed.
10. Remove and disassemble transmission
and repair as necessary.
J9521-132