What type of transmission fluid needs to be used in a 1990 Ford F150 Automatic with the 4.9 liter?
A 1990 Ford F-150 with a 4.9L engine and automatic transmission likely uses Type F automatic transmission fluid. However, it's crucial to double-check your owner's manual. The manual will specify the exact fluid type recommended by Ford for your specific truck. Using the wrong fluid can damage your transmission.