Signs of automatic transmission failure:
Gear shift problems:
* Delay or hesitation when shifting gears
* Labor-intensive or harsh gear shifting
* Sliding gears
* Missed gears
Unusual sounds:
*Buzzing, whining or humming while driving
*Slight bumps or jolts when shifting gears
Transmission fluid leaks:
* Transmission fluid stains or puddles under the vehicle
*Low transmission fluid level when checking dipstick
Burning smell:
* Smell of burnt or scorched transmission fluid inside or outside the vehicle
Drive problems:
*Car does not move forward or backward
* Wheels slip or skid on slippery surfaces
High transmission fluid temperature:
*Transmission fluid overheating indicated by transmission temperature gauge or warning indicator
Fault codes:
* Display of automatic transmission related fault codes on the dashboard or detected by a scanner
Other signs:
*Rattling, vibration or noise when driving
* Increased fuel consumption
* Reduced performance and overclocking dynamics