How do I know what transmission my F250 has?
The quick takeaway: most Ford F-250 trucks use either a six‑speed automatic (commonly code-named 6R140) or a ten‑speed automatic (commonly code-named 10R140). The easiest way to know which one yours has is to check the original window sticker or build sheet, then verify with a label on the transmission or a VIN-based lookup. This guide walks you through reliable ways to confirm your truck’s transmission with confidence.
Check the vehicle’s documentation first
Official records tied to the vehicle usually list the transmission model. Start with these sources:
Key places to check
- Window sticker (Monroney) or original build sheet, which often notes "Transmission: 6R140" or "Transmission: 10R140."
- Original owner’s manual or dealership records that mention the drivetrain or transmission option.
- Vehicle identification number (VIN) and the dealer’s database or Ford’s official VIN lookup for the specific build.
These documents are the most reliable way to confirm the exact transmission without needing to crawl under the truck.
Inspect the transmission or its tags
If you can safely access the transmission, look for identifying marks:
Physical labeling you might find
- Look for a metal tag or cast stamping on the transmission case that reads 6R140 or 10R140 (or another 10‑speed designation).
- Check for the number of forward gears by examining the transmission’s gear set or the shifter’s gear indicators, if visible.
- Inspect the transmission pan or side of the case for a code that identifies the model family.
Physical labeling is a fast sanity check, but not every truck shows the code in an easily readable place.
Use the VIN to confirm with reliable sources
VIN-based lookups can confirm drivetrain details, but transmission information is sometimes omitted in standard decoders. Use these approaches:
Ways to verify via VIN
- Enter the VIN on Ford’s official Owner site or through a dealer portal to retrieve the original equipment details, including the transmission if listed.
- Use a reputable third‑party VIN decoder that specifies drivetrain or transmission, while noting that some decoders may not always include the transmission code.
- Ask your Ford dealer to pull the original build sheet or factory order, which will definitively list the exact transmission model.
Relying on documentation and a dealer’s build data provides the highest confidence when VIN alone is inconclusive.
When to call a pro
If you’re still uncertain after checking the sticker, tags, and VIN, a Ford-certified technician can verify the transmission model by reading the factory build data or scanning the vehicle’s control modules.
Summary
In most F-250s, the transmission falls into one of two common families: a six‑speed automatic (6R140) or a ten‑speed automatic (10R140). Exact specification depends on model year and engine. Start with the window sticker or build sheet, confirm with a VIN-based lookup if available, and, if needed, inspect for a model code on the transmission itself or consult a dealer for definitive confirmation. With these steps, you’ll know your truck’s transmission and can proceed with maintenance or upgrades accordingly.
