New Ford 7.3 Gas

As an owner of a Ram 3500, SRW, 6.4 gasser, with 3.73 gears, and 6 speed auto, the only thing I’d consider changing is the gear ratio to 4.10. The 3.73 is just not deep enough when empty and driving over rolling hills as it causes the transmission to down shift frequently, rather than lug up the hills. Now when the camper is on, I just put the Trans in 4th gear and leave it there, and seems to do really well with minimal down shifts except in the mountains. . . .

I too have a 3500 SRW 6.4 Hemi CC 4wd with 3.73. I custom ordered the truck and had figured I would be in tow/haul mode so went with the 3.73 On hind sight, I'm in 6th most of the time on the highway so the 4.10s would have been a better choice. If/when we upgrade to a DRW, it will be same setup except 4.10s. Now once we get on the backroads, the 3.73s are much better, but the 4.10s would be the best choice. 4.30s may even be better, but think they would be too low empty.

While the oil is $8qt, but it only takes 7 and only has to be changed every ~7,800 miles, sooner if you run lower gears/higher RPMs. So not really that bad. Haven't heard of anything bad on the truck version of the 6.4.

The specs on the Ford 7.3 seem to be about the same as the 6.4 so imagine that would also be a great engine for TC application. The lower end torque is the key. While the 10 speed transmission seems like a good idea, with a load I see it shifting a lot more. So unless the bands are properly designed, I see band wear being an issue if you plan on keeping the vehicle a long time.

See my sig below for mileage and