Quote:
Originally Posted by Puglia10
The tires on there now are 29.3" tall and thats right about what the 22" setup will be at also (225/75 R16 and 265/35 R22 ) Hopefully that doesnt hurt me too much. I gotta get the RPMs down on the highway.
Lol, this truck is too nice underneath (and 2wd) to be driving around here in the salt and snow....itll be a 3 season truck only. Ill keep my f250 for winter duty.
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Taller tires = rpm drop just like putting in different gears.
225/75-16 @ 29.3" w/4.10's 1:1 final drive gear @ 65mph = 3056rpm
225/75-16 w/3.73's & th400 1:1 final drive gear @ 65mph = 2780
265/35-22 w/4.10's & th400 1:1 final drive gear @ 65mph = 3056
265/40-22 @ 30.3" w/4.10's 1:1 final drive gear @ 65mph = 2955rpm
265/40-22 w/3.73's & th400 1:1 final drive gear @ 65mph = 2689
265/45-22 @ 31.3" w/4.10's 1:1 final drive gear @ 65mph = 2861rpm
265/45-22 w/3.73's & th400 1:1 final drive gear @ 65mph = 2603
29.3" tire w/4.10's & 4l80e .75 final driver gear @ 65mph = 2292rpm
29.3" tire w/3.73's & 4l80e .75 final driver gear @ 65mph = 2085
30.3" tire w/4.10's & 4l80e .75 final driver gear @ 65mph = 2216rpm
30.3" tire w/3.73's & 4l80e .75 final driver gear @ 65mph = 2016
31.3" tire w/4.10's & 4l80e .75 final driver gear @ 65mph = 2146rpm
31.3" tire w/3.73's & 4l80e .75 final driver gear @ 65mph = 1952
A Gear Vendors OD set-up would be similar gearing behind a Th400 @ .78 vs .75 final drive ratio (the GV would be slightly higher rpm's vs the 4l80e).