chance-ihs
Member
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- Mazda CX-9 GT
When at low RPM usually between 1300 and 1700 RPM in 4th or 5th gear I get a bucking vibration or shudder. It completely goes away when I give it more throttle or less throttle or switch the transmission into manual mode. It does not happen when accelerating more aggressively or in manual mode. It is a 2008 CX-9 Grand Touring AWD with 95,000 miles on it. The manual mode absence of this problem makes me think that it is related to the torque converter locking and unlocking. What regulates that? Does anyone have any idea what could be causing this problem? Thank you, Chance