Final answer:
The lockup torque converter may shudder if it lacks oil pressure from the solenoid-controlled hydraulic circuit in an automatic transaxle.
Explanation:
The lockup torque converter in an automatic transaxle may shudder if it does not receive sufficient oil pressure from the solenoid-controlled hydraulic circuit. When oil pressure is low, the lockup torque converter can't engage properly, leading to a shuddering sensation.
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