Quote:
Originally Posted by Frank Lee
My F150 with E4OD downshifts at the slightest provocation too, and it really makes me mad.  Back in the day I tried larger diameter tires but that was a fail. Stock size tires are the best. The piston speed calcs for it put it at too slow rpms at 55 so it may very well be that shorter axle gears would help. Mine's 4x4 so I won't be doing that. |
Yeah, your choices are: lose 20-30mph going up the slightest hill by trying to convince it to stay in OD (in which case you may end up going so slow that it has to downshift anyway) or let it downshift and send your mileage straight into the crapper.
If you figure it up, to get into the middle of the proper piston speed range you'd have to be going like 75mph.
I really think this truck would respond well to 4.10's (ESPECIALLY with the camper in tow) but that's an expensive endeavor to change ring and pinions in both ends (4WD), even doing it myself, with no guarantee that it won't
cost you mpg's (it's bad enough the way it is!).