Without knowing the original transmission, it's impossible to say what size will fit. Simply stating "a certain size" is meaningless. Transmissions are identified by specific part numbers, not just size. Even transmissions of seemingly similar size from different years or manufacturers will likely have differing bolt patterns, input shaft sizes, and other critical differences that prevent interchangeability.
To find a replacement transmission, you'll need this information:
* Engine size and type: (e.g., 4.9L V8, 5.8L V8, 7.5L V8, etc.) This is crucial as the transmission must match the engine's output shaft.
* Transmission type: (e.g., automatic or manual; if automatic, the specific model number) This information might be found stamped on the transmission itself.
Once you have this information, you can consult a parts catalog (like a Ford parts catalog or a parts store's online database) or a transmission specialist to find a compatible replacement.
