Shifting Problems:
* Slipping: The engine revs but the car doesn't accelerate smoothly. This is a classic sign of a failing transmission. You might feel the engine speed increase without a corresponding increase in vehicle speed.
* Hard Shifting: Rough, jarring shifts between gears. This can be accompanied by clunking noises.
* Delayed Shifting: The transmission takes too long to shift gears. You might experience a noticeable pause before the car accelerates or changes gears.
* Inability to Shift: The car might refuse to shift into certain gears or get stuck in one gear.
* Grinding or Whining Noises: Unusual noises during shifting or while driving indicate internal transmission problems.
* Incorrect Gear Selection: The car might select the wrong gear, leading to jerky acceleration or deceleration.
Other Symptoms:
* Transmission Fluid Leaks: Check under your car for reddish-brown fluid. This is a strong indicator of a problem, possibly a leak or internal damage.
* Overheating: The transmission might overheat, leading to burning smells or a warning light on the dashboard.
* Check Engine Light: While not always directly related to the transmission, the check engine light illuminates when the onboard diagnostics detect a problem. It often requires a code reader to determine the exact issue.
* Strange Vibrations: Unusual vibrations, especially during acceleration or deceleration, might point towards transmission problems.
* Transmission Fluid Smell: Burning transmission fluid smells very distinct. If you smell something burnt and sweet near the engine bay, it's an urgent cause for concern.
Important Note: If you notice any of these symptoms, especially slipping, hard shifting, or fluid leaks, do not continue driving extensively. Driving with a failing transmission can cause further damage and lead to a much more expensive repair. Get it checked by a qualified mechanic as soon as possible. They can properly diagnose the problem and determine the best course of action, which could range from a simple fluid change to a complete transmission replacement.