Noticeable symptoms:
*Slippage: Slippage can manifest itself as a slipping sensation or delay when shifting gears.
* Gear Shift Delay: The transmission may be delayed in shifting gears, or may take several seconds to shift.
*Hard shifting: Gear shifting may be accompanied by strong impacts or shocks.
* Gear slippage: The gear may become disengaged when accelerating or climbing an incline.
* Noise: A faulty automatic transmission may make strange noises such as humming, knocking or squealing.
* Fluid leak: A fluid leak from the automatic transmission may indicate damage to the housing or seals.
Visual symptoms:
*Low Fluid Level: Low automatic transmission fluid levels can be a sign of a leak.
* Burnt or dirty fluid: Burnt or dirty fluid may indicate a clogged or worn system.
* Metal shavings or particles: The presence of metal shavings or particles in the automatic transmission fluid indicates internal wear.
Other symptoms:
* Trouble starting: The automatic transmission may slip or vibrate when starting.
* Reverse Difficulty: The transmission may make noise or have difficulty reversing.
*Going into limp mode: Some automatic transmissions go into limp mode when they detect a problem. This will limit the functionality of the transmission.
*Reduced Fuel Economy: An inefficient automatic transmission can result in poor fuel economy due to slippage or rough shifting.