1991 Ford F-150 Build - Project Fiery Redhead

The stock 8.8-inch rear axle was rusty worn-out junk, so we swapped in this Dynatrac Dana 60 with disc brakes and Motive Gear 4.10:1 ring-and-pinion. After several years of service (and abuse), it has performed flawlessly. Some may think that it's overkill on a 1/2-ton rig with a small V-8 and 33-inch tires, but every time we tow, haul, and wheel we have the peace of mind that Your Highness brings. We also fitted the axle with a Detroit Electrac electric locking differential (now discontinued and replaced by the E-Locker). We actually like this diff a lot. It's a limited-slip diff that can be locked. We've found that the limited-slip works so well, we rarely need to lock it. One issue we did have is our own fault. We mistakenly wired the locker to a hot connection on the fuse block instead of a keyed connection. The locker solenoid draws power continuously, so we had a dead main battery when the rig sat for over a week (another reason we're sold on the dual battery setup-it gave us a back-up battery). The dead battery left us stymied for a while until we traced the problem and made the easy correction. Finally, in this image you can see one of the MTS Company polyethylene fuel tanks. These tanks are inexpensive and will never rust. We highly recommend them.