TRUCK SERVICE MANUAL
TRANSMISSION
FHT 700D SERIES TRANSMISSIONS
Para 3-19
TROUBLESHOOTING CHART - Continued
Cause
Remedy
(F)
LOW LUBRICATION PRESSURE
1.
Oil level low
1. Add oil to proper level (para 3-3)
2.
Excessive internal oil leakage
2. Check the valve body mounting bolts;
lubrication valve seat and spring;
low main pressure (refer to C)
3.
Cooler lines restricted or leaking
3. Reroute or replace as necessary
4.
Lubrication valve spring weak
4. Replace valve spring
(G)
OIL LEAKING INTO CONVERTER HOUSING
1.
Converter pump hub seal worn
1. Replace seal
2.
Converter pump hub worn at seal area
2. Replace pump hub
3.
Engine rear seal worn
3. Refer to engine (or vehicle) service
manual
(H)
TRANSMISSION OVERHEATING IN ALL RANGES
1.
Oil level low
1. Add oil to proper level (para 3-3)
2.
Oil level high
2. Add oil to proper level (para 3-3)
3.
Cooler restricted (oil or coolant side)
3. Remove restrictions
(I)
NO RESPONSE TO SHIFT LEVER MOVEMENT
1.
Range selector linkage unhooked
1. Hook up linkage (refer to vehicle
service manual)
2.
Range selector linkage defective or broken
2. Repair or replace linkage (refer to
vehicle service manual)
3.
Main pressure low
3. Refer to C, above
4.
Range selector not engaged at control
4. Install or replace parts involved
valve
(inside oil pan)
(J) ROUGH SHIFTING
1.
Manual selector linkage out of adjustment
1. Adjust linkage
2.
Control valves sticking
2. Replace or rebuild control valve
assembly (para 6-4)
3.
Modulator valve sticking; spring adjust-
3. Repair or replace valves; back off
ment too tight
spring adjustment (para 6-4)
4.
Modulator actuator cable kinked or out of
4. Replace or adjust actuator cable
adjustment
(refer to vehicle service manual)
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