To definitively identify the transmission, you need to:
1. Check the Casting Numbers: Look for casting numbers stamped on the transmission case itself. These numbers will be your best source of information. These numbers are often found on the side of the transmission, near the bellhousing. You'll need to consult a Ford parts catalog or online database (like a parts website's look-up tool) to cross-reference the casting number with the manufacturer.
2. Examine the Identification Tag (if present): Sometimes, a tag is attached to the transmission providing model and manufacturer information. This is less reliable as it can be lost or damaged over time.
3. Compare to known pictures/diagrams: If you can find high-quality photos or diagrams of both Mazda and Mitsubishi transmissions used in 1994 Ford Rangers, you might be able to visually compare, but this is not a definitive method and relies heavily on finding accurate and clear images.
In short, relying on visual inspection alone is unreliable. Using the casting numbers is the only certain way to identify the transmission manufacturer.
