What is the rear axle ratio on a 2017 F-450?
The rear axle ratio for the 2017 Ford F-450 does not have a single fixed value; it varies by configuration. Depending on engine, drivetrain, cab/bed setup, and towing package, the truck could be equipped with several different gear ratios. To know the exact ratio for a specific vehicle, check the door sticker, axle tag, or the VIN/build sheet.
Why the ratio varies across 2017 models
Ford offered multiple rear-axle ratios on the 2017 F-450 to balance payload, highway efficiency, and towing performance. The exact ratio depends on the particular production configuration of the truck, including whether it uses dual rear wheels (DRW) and which towing or trim packages were selected. The following ratios were available across different builds.
Common rear-axle ratio options
Below is a list of the axle ratios that were available for the 2017 F-450. The exact ratio on any given truck is determined by its factory configuration.
- 3.73:1 (available on some configurations)
- 4.30:1 (a common choice for towing-focused builds)
- 4.88:1 (often used with heavy towing/Gooseneck setups or DRW configurations)
Keep in mind that not every F-450 model had all three options; the exact ratio depends on the specific build. To verify, refer to the vehicle’s documentation or labeling as described below.
How to verify your vehicle's rear axle ratio
Use one or more of these methods to confirm the exact ratio for a 2017 F-450 you own or are evaluating.
- Check the driver-side door placard (the same label that lists tire pressures). It often includes the rear axle ratio.
- Inspect the rear differential tag or the axle itself for a “RATIO” or “AXLE” specification printed on the tag or cover.
- Decode the VIN (Vehicle Identification Number) through Ford’s official build data or a reputable VIN decoder; the axle ratio is part of the factory configuration data.
- Refer to the original window sticker or dealership documentation if you have access to it.
Knowing the exact ratio helps with towing calculations, speedometer accuracy, and maintenance planning. If you’re evaluating a used 2017 F-450, request the build sheet or decode the VIN to determine the exact axle ratio.
Summary
In short, there isn’t one universal rear axle ratio for the 2017 Ford F-450. The truck was built with several possible axle ratios to accommodate different towing needs and configurations. To be certain, verify the ratio on the specific vehicle using the door sticker, axle tag, VIN data, or the dealer’s records.
