|
A - ABNORMAL SHIFTS ALL MODELS
|
| Condition |
Probable
Causes |
Suggested
Remedies |
| Shifts Occur at Too High Speed |
1. Governor
valve malfunctioning (stuck). |
1. Clean or
replace governor screen and/or governor. |
| 2. Vacuum
modulator vacuum hose to engine kinked or leaking - light throttle shifting
delayed. |
2. Replace
hose. Be sure vacuum line is free from kinks or bends and not close to
exhaust components. |
| 3.
Modulation delayed (vacuum). |
3. Replace
vacuum modulator. Be sure that O-ring is installed. |
| 4.
Mechanical actuator cable kinked, broken or not properly adjusted. |
4. Replace,
adjust, or repair cable. Full actuator control cable travel must correspond
with full throttle. |
| 5.
Mechanical actuator malfunctioning. |
5. Replace
actuator. |
| 6. Shift
signal valve adjustment too high. |
6. Adjust
shift speeds. Refer to transmission service manual. |
| 7. Valves
sticking. |
7. Replace
or rebuild control valve assembly. |
| 8. Improper
Modulator. |
8. Inspect
and replace, if necessary, modulator valve and modulator body. |
| Shifts Occur at Too Low Speed - Full Throttle |
9. Governor
spring weak or missing. |
9. Replace
governor. |
| 10.
Mechanical actuator kinked, broken, or not properly adjusted. |
10. Replace,
adjust, or repair cable. Full actuator control cable travel must correspond
with full throttle. |
| 11. Shift
signal valve spring adjustment too loose. |
11. Tighten
spring adjusting ring to specification. |
| 12.
Modulator valve stuck open. |
12. Check
spring adjustment. Clean or replace modulator valve. |
| Rough Shifts |
13. Governor
valve malfunctioning. |
13. Clean or
replace governor screen and/or governor. |
| 14. Vacuum
modulator valve hose kinked or leaking. |
14. Replace
hose, check spring adjustment. |
| 15.
Mechanical actuator cable kinked, broken, or not properly adjusted. |
15. Replace,
adjust, or repair cable. Full actuator control cable travel must correspond
with full throttle. |
| 16.
Mechanical actuator malfunctioning. |
16. Replace
actuator. |
| 17. Vacuum
modulator failed. |
17. Replace
vacuum modulator. Be sure that O-ring is installed. |
| 18. Trimmer
valves sticking (broken spring). |
18. Replace
or rebuild control valve body assembly. |
| 19. Control
valves sticking. |
19. Replace
or rebuild control valve body assembly. |
| 20.
Modulator valve sticking. |
20. Clean
valve. Check vacuum modulator. |
| 21. Vacuum
modulator valve spring not adjusted properly. |
21. Adjust
spring. |
| 22. Engine
idle speed too fast (N (Neutral [ or P (Park), if applicable] to D (Drive)). |
22. Adjust
engine idle screw. (Refer to vehicle service manual.) |
| 23. Selector
linkage out of adjustment. |
23. Adjust
linkage. |
| No Specific Shift; i.e.., 1-2, 2-3, 3-4, 4-5 (Up or Down) |
24. Governor
valve malfunctioning. |
24. Clean or
replace governor screen and/or governor. |
| 25. Specific
range valves malfunctioning (sticking). |
25. Replace
or rebuild valve body assembly. |
| Excessive Engine Flare |
26. Refer to
Chart G. |
26. Refer to
Chart G. |
