* Automatic Transmission: The fill location is usually on the side of the transmission, often with a dipstick attached. The dipstick itself will have markings indicating the "add" or "full" levels. Look carefully along the sides and top of the transmission case for this.
* Manual Transmission: Manual transmissions typically don't have a dipstick. The fill location is usually a separate plug on the top or side of the transmission case. A shop manual or a service manual specific to your car's transmission (e.g., a Muncie, BorgWarner T-10, etc.) will be necessary to identify the correct fill plug.
To find the correct location, you should:
1. Consult a repair manual: A Haynes or Chilton manual for your specific 1978 Pontiac Trans Am is your best bet. These manuals have diagrams showing the location of all fluid fill and check points.
2. Look for a dipstick: If it has an automatic transmission, this is the easiest way to find the fill point.
3. Use online resources: Search for "[Your Trans Am's Transmission Type] fill location" (e.g., "TH350 fill location"). You'll find images and descriptions that may help, but always double-check with a repair manual.
Important Note: Incorrectly adding transmission fluid can damage your transmission. If you are unsure, it's best to take your car to a qualified mechanic.
