D 250 Pickup V6-239 3.9L (1989)
Torque Converter Clutch Solenoid: Testing and Inspection
A500/A518 4-Speed
Locks Up or Drags In Low or Second
1.
Sticking fail-safe valve.
2.
Sticking switch valve.
3.
Valve body malfunction.
4.
Faulty oil pump.
Loud Chatter During Lock-Up Engagement (Cold)
1.
Leaking turbine hub seal in converter.
2.
Failed locking clutch in converter.
No Lock-Up
1.
Faulty input shaft or seal ring.
2.
Leaking turbine hub seal in converter.
3.
Failed locking clutch in converter.
4.
Failed lockup relay.
5.
Failed lockup solenoid.
6.
Solenoid wiring disconnected.
7.
Sticking lockup solenoid.
8.
Sticking fail-safe valve.
9.
Sticking lock-up valve.
10.
Sticking switch valve
11.
Valve body malfunction.
12.
Sticking governor valve.
13.
Faulty oil pump.
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.
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.
