Torque Converter Operation Concern: Cycling/Shudder/Chatter

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC ROUTINES REFERENCE

Possible Component	Reference/Action
252 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, PCM and Torque Converter Clutch (TCC) solenoid	Carry out Torque Converter Operation Test. Refer to TORQUE CONVERTER DIAGNOSIS . Run On-Board Diagnostic (OBD). Refer to INTRODUCTION - GASOLINE MODELS for diagnosis. GO to PINPOINT TEST A using the scan tool. Repair as required. Clear codes. Road test and rerun OBD .
Solenoid Body
Incorrect solenoid body strategy data stored in the PCM	Verify solenoid body strategy data stored in the PCM, download new identification and strategy as necessary. Refer to SOLENOID BODY STRATEGY .
352 - HYDRAULIC/MECHANICAL ROUTINE
Condition	Prior to carrying out this action, make sure all electrical diagnostics have been carried out. Inspect transmission fluid condition. If burnt, drain transmission fluid and converter. Install new transmission fluid and transmission fluid filter assembly. Bring vehicle to normal operating temperature. Carry out Transaxle Drive Cycle Test. Carry out OBD . If condition still exists, continue diagnostics.
Incorrect Pressures
Line pressure	Check pressure at pressure tap. Carry out Line Pressure Test. Refer to SPECIAL TESTING PROCEDURES . See the LINE PRESSURE CHART for specifications. If not OK, check Main Control. Refer to MAIN CONTROL VALVE BODY .
Main Controls
Bolts out of torque specification	Tighten bolts to specification.
Gaskets and separator plate - damaged, off location	Inspect gaskets for damage. Repair as required.
TCC regulator valve, springs, clips - loose, stuck, binding, missing, misassembled	Inspect for damage. Repair or install new as required.
TCC control valve, springs, clips - loose, stuck, binding, missing, misassembled	Inspect for damage. Repair or install new as required.
TCC solenoid - not functioning correctly	Activate solenoid using scan tool. Refer to OUTPUT STATE CONTROL (OSC) MODE . GO to PINPOINT TEST A . Install a new solenoid as required. Refer to SOLENOIDS . Download a new solenoid body strategy into the PCM. Refer to SOLENOID BODY STRATEGY .
Turbine Shaft
Seals - damaged, missing	Inspect for damage. Install new as required.
Torque Converter
Torque converter damaged	Refer to TORQUE CONVERTER CONTAMINATION INSPECTION .
Stator Support Assembly
Stator support assembly - worn, damaged	Inspect for damage. Install new as required.
Stator support seals - worn, damaged, leaking	Inspect for damage. Install new as required.