What ratio is a type 18 rear end to 4x4 ford f150?

A Ford F-150 with a "Type 18" rear end doesn't refer to a specific gear ratio. The "Type 18" designation isn't a standard Ford terminology for axle ratios. Ford uses numerical ratios (like 3.55, 3.73, 4.10, etc.) to specify the rear axle gear ratio.

To find the gear ratio of your F-150's rear axle, you need to:

* Check the sticker on the driver's side doorjamb: This usually lists the axle ratio.

* Look at the build sheet (if you have it): Your truck's build sheet will specify the axle ratio.

* Examine the axle itself (requires some mechanical knowledge): The ratio is often stamped on the differential housing or ring gear. You'll need to count teeth on the ring and pinion gears to calculate the ratio.

* Use a Ford VIN decoder: Input your truck's VIN number into a Ford VIN decoder website to obtain the specifications, including the axle ratio.

Without additional information, it's impossible to determine the rear axle gear ratio of your F-150.