Some customers may complain about an intermittent shudder when lightly accelerating after an upshift between 20 mph and 45 mph or before a downshift between 30 mph and 65 mph when the torque converter assembly is in flex lockup. Production changes to the torque converter have been implemented to improve this condition.
This applies to 2007-2008 Tundra vehicles equipped with a 6-speed automatic transmission and the 5.7L V8 engine.
- Vehicle speed
- Shift status
- Lock up
- Lock up solenoid status
- SLU solenoid status
- If the shudder occurs with Lock Up “ON,”, Lockup solenoid status “OFF,” and SLU solenoid status “OFF,” then the shudder is related to torque converter flex lockup. Proceed to Step 5.
- If the shudder occurs with Lock Up “OFF,” Lock Up solenoid status “OFF,” and SLU solenoid status “OFF,” then the condition is not related to torque converter flex lockup and this TSB does not apply. Continue diagnosis to identify the root cause of the shudder.
The replacement torque converter is available as part number 32000-0C030.