TRANSMAX NOTE: This guide is educational. Vehicle symptoms can have more than one cause, so diagnosis is required before deciding what repair is appropriate.
Torque-converter clutch behavior
Converter clutch apply or release problems can produce a repeated vibration under certain speeds and loads.
Fluid condition
Incorrect, degraded or contaminated fluid may contribute to friction-related shudder in some applications.
Engine misfire
An engine performance problem can feel similar to a transmission shudder and should be ruled out.
Mounts, axles and driveline
Mechanical vibration from surrounding components can be transmitted through the vehicle.
Road-test conditions matter
Speed, throttle position, gear, temperature and load help narrow down the source.