Shifting Problems:
* Slipping: The engine revs up but the car doesn't accelerate as expected. This is a major warning sign. It might happen in one gear or several.
* Hard shifts: Abrupt, jarring shifts between gears.
* Delayed shifts: The transmission takes too long to shift, resulting in hesitation or a sluggish response.
* Inability to shift: The car might get stuck in one gear or refuse to shift at all.
* Grinding noises during shifts: A grinding or crunching sound when shifting gears indicates significant internal damage.
* Erratic shifting: The transmission may shift unpredictably, jumping between gears without a clear pattern.
Other Symptoms:
* Whining noise: A whining sound, especially when accelerating, is often a sign of low transmission fluid or worn internal components.
* Strange noises (clunking, banging): Unusual noises coming from the transmission area can indicate serious problems.
* Fluid leaks: Check under your car for transmission fluid leaks. The fluid is typically reddish.
* Overheating: The transmission might overheat, leading to a burning smell.
* Check engine light: While not always directly related to the transmission, a check engine light can indicate transmission problems, especially if accompanied by other symptoms.
* Transmission fluid smells burnt: Burnt transmission fluid has a distinct acrid odor.
Important Note: These symptoms can also indicate other problems, so it's crucial to have a qualified mechanic diagnose the issue. Ignoring transmission problems can lead to catastrophic failure and expensive repairs. Don't delay getting it checked if you suspect anything is wrong.