What Causes Engine Vibration When Stationary in D Gear?
1 Answers
Engine vibration when stationary in D gear can be caused by: 1. Aging or improperly installed engine/transmission mounts; 2. Gear engagement impact due to contaminated transmission fluid affecting hydraulic system performance; 3. Severely dirty engine throttle body altering engine load and transmission operation; 4. Improper air-fuel mixture caused by engine malfunctions like faulty spark plugs or fuel injectors. Slight vibration in automatic vehicles when engaged in D gear is normal, especially for AT transmissions with torque converters. Vehicles using multi-plate clutches or dry clutches should completely disengage when shifting, making any vibration abnormal.