Converter Clutch Apply Rough, Slips or Shudders

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

Soft TCC Apply (Shudder)

Checks	Cause
DEFINITION: An unacceptably long TCC apply occurs in third or fourth gear, Drive or Manual Third range, with the throttle held steady. This can cause a momentary rapid jerking sensation in the vehicle during the TCC apply.
Control Valve Body Assembly	The TCC regulator apply valve (327) is stuck or binding. The TCC regulator apply valve spring (326) is missing or damaged. The control valve body spacer plate gaskets assembly (396) are misassembled or contain incorrect parts. TCC control valve stuck or binding. TCC control valve spring is missing or damaged. TCC PWM solenoid faulty.
Case Cover Assembly	The TCC blowoff ball valve (420B) or the spring (418) is damaged or is not seating.
Turbine Shaft Assembly	The turbine shaft O-ring seal (520) is damaged or is missing. The turbine shaft oil seal rings (513, 519) are damaged or missing. The turbine shaft (518) is damaged.
Drive Sprocket Support Assembly	The turbine shaft bushing (523) is worn or damaged.
Torque Converter Assembly	The torque converter bushing is worn or damaged The torque converter cover surface is damaged under lug thread(s) due to the flexplate bolt bottoms out. The torque converter is damaged internally The TCC friction material is missing or damaged The TCC plate is distorted or damaged The torque converter internal O-ring seal is missing or damaged