Page 153 - Hydra-matic 6 Speed RWD Technician's Guide (October 2005)

DRIVE RANGE – 4TH GEAR
(Torque Converter Clutch Applied)

The torque converter clutch (TCC) applies during 4th gear opera-
tion when the transmission control module (TCM) receives the
appropriate input signals to energize (turn ON) the Torque Con-
verter Clutch Pressure Control Solenoid. The TCC can apply in 2nd
and 3rd gear also.
NO 4TH GEAR
• CBR1/C456 Pressure Control Solenoid 3
- Commanded/failed LOW (ON)
- Leaking

• CBR1/C456 Clutch Regulator Valve (327)
- Stuck

• 4-5-6 Clutch Piston (439)
- Leaking
- Jammed or cracked
• Turbine Shaft Fluid Seal Rings (442)
- Leaking
- Missing

• 4-5-6 Clutch Housing Assembly (441)
- Leaking
- Cracked
NO TCC APPLY

• TCC Pressure Control Solenoid
- Commanded/failed LOW (OFF)
- Stuck OFF
- Leaking
- Poor connection
• TCC Regulator Apply Valve (355)
- Stuck in OFF position

• TCC Control Valve (227)
- Stuck in OFF position

• Turbine Shaft Seal (443)
- Damaged
- Missing
TCC STUCK ON

• TCC Pressure Control Solenoid
- Stuck ON

• TCC Regulator Apply Valve (355)
- Stuck ON

SHIFT SHIFT 1-2-3-4 CL 2-6 CL 3-5 REV CL 4-5-6 CL LOW LOW
SOL SOL PC PC PC PC 1-2-3-4 3-5 REV 4-5-6 2-6 & REV CLUTCH
1 2 SOL 5 N.L. SOL 4 N.L. SOL 2 N.H. SOL 3 N.H. CLUTCH CLUTCH CLUTCH CLUTCH CLUTCH SPRAG
OFF ON ON OFF OFF ON APPLIED APPLIED
90A