K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Torque Converter Clutch: Testing and Inspection
No Torque Converter Clutch Apply
1.
12 volts not being supplied to the transmission.
2.
Defective transmission outside electrical connector.
3.
Defective inside electrical connectors, wiring harness, solenoid.
4.
Defective electrical ground inside transmission.
5.
Defective pressure switch or improper connection.
6.
Solenoid not grounded.
7.
Valve body converter clutch shift or throttle valve sticking.
8.
Valve body casting or spacer plate in converter clutch valve area are improperly positioned or damaged.
9.
Converter clutch apply valve, stuck or installed backwards.
10.
Pump assembly signal oil orifice, restricted or missing.
11.
Pump assembly O-ring on solenoid damaged or missing.
12.
Pump to case gasket, damaged or improperly positioned.
13.
Pump assembly cup plug missing from apply passage.
14.
Pump assembly orifice plug missing from the cooler input passage.
15.
High or uneven bolt torque on cover to body.
16.
Converter clutch stop valve or retainer ring not installed properly.
