B350 1 Ton Van V8-5.9L VIN Z (1992)
Torque Converter: Testing and Inspection
A727/A904/A998/A999 3-Speed
Shudder After Lockup Engagement
1.
Throttle linkage improperly adjusted.
2.
Engine out of tune.
3.
Exhaust system out of alignment.
4.
Failed locking clutch in converter.
5.
Valve body malfunction.
6.
Plugged cooler, lines or fittings.
7.
Faulty oil pump.
Stalls or Is Sluggish In Reverse
1.
Faulty input shaft or seal ring.
2.
Sticking switch valve.
3.
Valve body malfunction.
4.
Plugged cooler, lines or fittings.
5.
Faulty oil pump.
Stays Locked Up at Too Low A Speed In Direct Drive
1.
Failed lockup relay.
2.
Sticking lockup solenoid.
3.
Sticking fail-safe valve.
4.
Sticking lock-up valve.
5.
Sticking switch valve.
6.
Valve body malfunction.
7.
Sticking governor valve.
Vibration or Shudder During Lockup Engagement
1.
Engine out of tune.
2.
Faulty torque converter.
3.
Valve body malfunction.
4.
Faulty oil pump.
Vibration In Neutral
1.
Torque converter out of balance.
Vibrations After Lock-Up Engagement
1.
Throttle linkage improperly adjusted.
2.
Engine out of tune.
3.
Exhaust system out of alignment.
4.
Faulty torque converter.
Will Not Unlock
1.
Sticking fail-safe valve.
2.
Sticking lock-up valve.
3.
Sticking switch valve.
4.
Valve body malfunction.
5.
Sticking governor valve.
