K 3500 Truck 4WD V8-393 6.5L DSL Turbo (1993)
Torque Converter Clutch: Symptom Related Diagnostic Procedures
No Torque Converter Clutch Apply
1.
TCC system:
a.
Stuck off.
b.
O-ring failure.
c.
No voltage to solenoid.
d.
Poor electrical connection.
2.
Brake switch:
a.
Contact corroded.
b.
Poor electrical connection.
c.
Pinched wire.
d.
Misadjusted.
e.
No supply voltage.
3.
Solenoid malfunctioning.
4.
Quad driver module failure.
5.
TCC valve stuck due to debris or undersized bore.
6.
Retainer pin broken.
7.
Ballooning torque converter.
8.
Turbine shaft plugged oil holes.
9.
Turbine shaft seals or pump body bushings worn out.
10.
Oil transfer hole cup plug leaking.
11.
Regulated apply valve stuck.
12.
TCC valve release exhaust orificed cup plug blocked.
Slipping TCC
1.
TCC valve release or exhaust orificed cup plug blocked.
2.
Turbine shaft seal cut.
Slow Application of TCC
1.
Turbine shaft seals or pump body bushing worn or ineffective.
2.
O-ring heat set.
3.
Oil transfer hole cup plug leaking.
4.
TCC solenoid malfunctioning.
5.
Low fluid pressure.
TCC Apply W/Cold Engine
1.
Check code 14, engine coolant temperature sensor circuit high.
2.
Check code 15, engine coolant temperature sensor circuit low.
TCC on In All Gears
1.
Check code 69, TCC stuck On.
TCC Stuck on
1.
Malfunctioning TCC solenoid.
2.
TCC apply valve stuck.
3.
Quad driver module failure.
Torque Converter Clutch Shudder
1.
Inspect torque converter assembly.
2.
Check oil pump and filter.
3.
Check input housing and shaft assembly.
