To be absolutely certain, you should:
* Check your owner's manual: This is the definitive source for the correct fluid type.
* Look at the transmission dipstick: Sometimes the recommended fluid type is printed on the dipstick itself.
* Check the sticker under the hood: Often, a sticker near the radiator or elsewhere under the hood will list recommended fluids.
If you can't find the information using these methods, take your vehicle to a trusted mechanic or auto parts store. They can identify your transmission and recommend the correct fluid. Providing the VIN (Vehicle Identification Number) to a parts store can also help them identify the correct fluid.
Using the incorrect transmission fluid can damage your transmission, so it's crucial to use the right one.