* Automatic Transmission: The drain plug is usually on the passenger-side (right-side) of the transmission case, near the bottom. You will likely need to get under the car to access it. It's usually a smaller bolt than engine drain plugs.
* Manual Transmission: Manual transmissions typically *don't* have a drain plug in the traditional sense for the transmission oil itself. The oil is often changed by removing the side cover which involves considerably more work than simply draining the oil.
To find out which transmission you have:
1. Check your vehicle's documentation: Your owner's manual should clearly state the transmission type.
2. Look at the shifter: An automatic transmission will have a gear selector with positions like "P," "R," "N," "D," etc. A manual will have a gear shift lever with distinct gears (1, 2, 3, 4, 5, R).
3. Look under the car (carefully!): If you're comfortable doing so, you can get a quick look underneath to see the shape and size of the transmission case. Automatic transmissions tend to be larger and more complex looking than manual transmissions.
Once you know the transmission type, searching online for "1998 Chevy Cavalier [Automatic/Manual] Transmission Drain Plug" with images will likely give you a very clear visual of its location. Remember to use jack stands for safety if you plan to work under your car.
