The most common transmissions in that era were:
* AOD (Automatic Overdrive): This was a very common 4-speed automatic. Many Ford vehicles from the late 70s through the early 90s used this transmission. Finding a replacement would be relatively easy.
* C6 (Cruise-O-Matic): A 3-speed automatic, less common in '87 Crown Vics, but still possible.
You'll need to determine which one is in your Crown Vic *before* searching for a replacement. To find out:
1. Check your vehicle's documentation: Owner's manual, build sheet (if available), etc. This will give you the most accurate information.
2. Look for identification tags on the transmission itself: These tags usually have codes indicating the transmission type.
3. Check online resources: Websites like FordParts.com or other parts suppliers may have diagrams or information based on your VIN. Your VIN is essential for this.
Once you know the transmission type (AOD, C6, or something else less common), you can then search for compatible transmissions from other Ford vehicles from the same era (late 1970s to early 1990s). The best option is to find a donor vehicle with the same transmission, engine, and year range as possible for optimal fit and functionality. Remember to consider mileage on the used transmission.