Possible causes of kicks when changing automatic transmission speeds:
1. Low transmission fluid: Low fluid levels can cause insufficient pressure, resulting in slippage or harsh shifts.
2. Contaminated transmission fluid: Contaminated transmission fluid can cause clogged hydraulic passages and loss of pressure, resulting in kicking.
3. Worn Clutches: Over time, clutches in an automatic transmission can wear out, leading to slippage and kicking.
4. Faulty Shift Solenoid: The solenoids control the transmission fluid flow to the various gears. A faulty solenoid can cause improper shifting and kicking.
5. Faulty Transmission Control Module (TCM): The TCM controls the electronic functions of the automatic transmission. A faulty TCM can cause shifting problems, including kicking.
6. Problems with the turbine shaft: The turbine shaft connects the engine to the automatic transmission. A worn or damaged turbine shaft can cause vibration and kicking when shifting.
7. Faulty torque converter: The torque converter acts as a coupling between the engine and the automatic transmission. A faulty torque converter can cause slipping and kicking when shifting.
8. Wiring problems: Electrical faults in the automatic transmission wiring can lead to malfunctions and shifting kicks.
9. Mechanical Component Failure: Internal mechanical components of the automatic transmission, such as gears, synchronizers and bearings, can become worn or damaged, resulting in shifting noise.
What to do if the automatic transmission kicks:
1. Check the level and condition of the transmission fluid.
2. Run diagnostics on your computer to identify any trouble codes.
3. Consult a qualified automatic transmission mechanic for proper diagnosis and repair.
4. Perform automatic transmission maintenance regularly, including flushing and replacing fluid in accordance with the manufacturer’s recommendations.