Mechanical problems:
*Low transmission fluid level
* Worn or damaged transmission components such as clutches, clutches or planetary gears
* Clogged or dirty transmission filter
* Faulty sensors or solenoids
* Worn or damaged turbine or pump shaft
Electrical problems:
* Faulty Transmission Control Module (TCM)
* Poor electrical contact
* Faulty speed or engine speed sensors
* Faulty solenoids
Hydraulic problems:
* Insufficient fluid pressure
* Transmission fluid leaks
* Clogged or dirty hydraulic lines
Software problems:
* Incorrect programming or TCM software updates
* Malfunctions in the engine management system
Other reasons:
* Timing belt or chain slippage
* Worn or damaged engine or transmission mounts
* Worn or damaged torsion damper device (for rear wheel drive vehicles)
* Incorrect transmission mounting
* Worn or damaged spark plugs or wires (for gasoline vehicles)