A stall speed significantly higher than the specified value typically indicates which problem?

A stall speed significantly higher than the specified value typically indicates which problem?

• A. A slipping clutch
• B. A stuck stator
• C. A freewheeling stator
• D. An engine that needs a tune-up

Answer: (A)

Stall speed is the engine RPM at which the drivetrain begins to lose the ability to transfer torque to the wheels under load. If that stall speed is much higher than the specified value, it means the engine is revving up more before the car starts to move because the clutch isn’t gripping properly. The clutch is slipping, so the engine spins faster while the wheels stay relatively slow, pushing the observed stall RPM up. The other options involve torque converter components or a tune-up in ways that don’t as directly cause a higher stall RPM in this context.

Stall speed is the engine RPM at which the drivetrain begins to lose the ability to transfer torque to the wheels under load. If that stall speed is much higher than the specified value, it means the engine is revving up more before the car starts to move because the clutch isn’t gripping properly. The clutch is slipping, so the engine spins faster while the wheels stay relatively slow, pushing the observed stall RPM up. The other options involve torque converter components or a tune-up in ways that don’t as directly cause a higher stall RPM in this context.