Torque Converter Clutch Operation Concerns: Cycling/Shudder/Chatter

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

TORQUE CONVERTER CLUTCH OPERATION CONCERNS - CYCLING/SHUDDER/CHATTER

Possible Component	Reference/Action
242 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, PCM, torque converter clutch (TCC) solenoid, OSS	Carry out self-test. Refer to the INTRODUCTION - GASOLINE article for diagnosis and testing of the Powertrain Control System. GO to PINPOINT TEST E . Repair as required. Clear DTCs, road test and repeat self-test.
Speed control equipped vehicles	Evaluate with speed control off.
342 - HYDRAULIC/MECHANICAL ROUTINE
Fluid
Condition	Inspect fluid condition. If burnt, drain fluid and converter. Install a new fluid and filter assembly. Bring vehicle to normal operating temperature. Carry out Transmission Drive Cycle Test. Carry out Transmission self-test. If condition still exists, continue diagnostics.
Main Controls
Solenoid pressure regulator valve, No. 7 check ball, bypass clutch control valve and plunger, converter pressure limit valve stuck, damaged or assembled incorrectly	Inspect for damage. Repair as required.
Bolts not tightened to specifications	Tighten bolts to specifications.
Solenoid screen blocked or damaged	Clean or install a new screen.
TCC solenoid malfunction	Activate solenoid using diagnostic tool. If solenoid operation cannot be felt when placing hand on solenoid, install a new solenoid. Inspect O-rings for damage. Repair as required.
Gaskets damaged	Inspect for damage and install a new gasket.
Pump Assembly
Bolts not tightened to specification	Tighten bolts to specification.
Porosity/cross leaks, missing balls or leaking	Inspect for porosity/leaks or missing balls. Install a new pump as required.
Gaskets damaged	Inspect for damage and install a new gasket.
Input Shaft
Seals damaged	Inspect for damage. Repair as required.
Torque Converter
Excessive end clearance	Inspect converter. Install a new or remanufactured torque converter as required.