Symptoms of automatic transmission malfunction:
Gear slippage:
* Engine speed increases, but the vehicle does not accelerate or accelerates slowly.
* Programs may be switched off and on without your knowledge.
Gear shift delays:
* The transmission is slow to shift or shifts rough.
* Transmissions may not turn on at all.
Rough gear shifts:
* Gear shifts with noticeable jolts or jerks.
* Vibration or noise is felt when shifting gears.
Noise or vibration:
* Constant noise or hum when driving at certain speeds.
* Vibration transmitted to the steering wheel, floor or seats.
Leaks:
* Transmission fluid stains under the car.
*Low transmission fluid level, checked with dipstick.
Torque converter lockup problems:
* Uneven engine speed when driving at a constant speed.
*Feeling of clutch slipping when accelerating.
Overheat:
* The transmission overheat indicator comes on.
*Transmission fluid turns dark or smells burnt.
* The feeling that the car is “stuck” in gear.
Other signs:
* Smell of burning or burnt oil.
* Difficulty when shifting gears from Park (P) or Neutral (N).
* Flashing or illuminated transmission fault indicator.