The rear differential fill plug for a 2002 Ford F-150 is located on the passenger side of the rear axle housing, near the top. It is a 17mm hex head plug.
Here are some tips for locating the rear differential fill plug on a 2002 Ford F-150:
* Park the truck on a level surface and engage the parking brake.
* Locate the rear axle housing. It is the large cylindrical housing that connects the rear wheels to the differential.
* Look for a 17mm hex head plug on the passenger side of the rear axle housing, near the top.
Once you have located the fill plug:
* Use a 17mm wrench to loosen the fill plug.
* Be careful not to drop the fill plug into the rear differential.
* Allow the old fluid to drain from the rear differential.
* Once all of the old fluid has drained out, replace the fill plug.
* Tighten the fill plug until it is snug.
Note: If you are changing the rear differential fluid, you will also need to add new fluid to the rear differential. The amount of fluid required will vary depending on the model of your truck. Please refer to your owner's manual for the specific amount of fluid required.
