Made the big change this weekend
My wife and I took a trip to the White Mountains in Arizona a couple of weeks ago. We pulled our 28ft Cougar 5th whl with my 04 Chevy 6.0 Gas guzzler. We averaged 7.5 MPG, but what was really discon...
Forum Discussion
Ford will not know but the rear end will. In the past the rear gears were run in on a machine and installed as a matched set. The way they are built today the ring gear never meets the pinion gear until the rear end is built. The 500 mile break in is to mate the gears to each other. This needs to be done at low speed and light load.
