Home Forums Truck Camper Adventure Forum 4.30 or 3.73 gears for F350 7.3L? Reply To: 4.30 or 3.73 gears for F350 7.3L?


Some new input about the diff ratios with the 7.3L gasser.
As above, the 4.30 is just right for me but a couple weeks ago I accompanied my brother John (JR) to Kelso WA to pick up his brand spanking new 10 foot ALASKAN camper to go on his 2022 F-350 SC LB 7.3L gasser.
I’ll be doing a writeup on here about my findings.
He chose the 3.73’s as he plans on not leaving his AKan on all the time and using it a s a pickup.
I drove quite a bit both going to Kelso and the 1K miles back down to CA.
I can report that the 3.73’s were perfect for his rig and did not cause a lot of downshifting….some, but not much. Bro and I got really good mpg going home; a couple pops better than my similar Ford sled. I attribute this to a much lower wind resistance with the hard top down.

2020 Ford F-350 XLT FX4 4WD SRW SB SC 7.3L Godzilla Gas TorqShift 10R140 397 amps dual Alt dual batts Frnt Dana 60; Rr Dana M275 E-locker 4.30's 4580/4320/4066# payload 7243# curb wt. 11,300# GVWR 5-er prepped. 2020 Northstar Laredo SC, 12v compressor fridge, cassette, 320w Solar sub zero insulation.