Gearing help

711 Views 4 Replies 3 Participants Last post by TravisT, Jun 5, 2006

2302let

Discussion Starter · Jun 5, 2006

I have a 1997 F-350 ps, DRW, 5-speed, and what I believe to be a 4:10 gear ratio. I tow from 10,000 to 12,000 pounds frequently and really like the low end gears I have. However, upon reaching highway speeds, my tach is showing approx. 2400 rpm. I can also watch my fuel gauge moving to the left. I have considered changing my gear ratio to 3.73 to help with the fuel usage but I'm worried about my ability to get moving in 1st gear. Any ideas on how a change to 3.73 gears would effect my low gears?

Thanks!

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MarkEkberg

· #4 · Jun 5, 2006

With that weight I would stay with the 4.10's If you looking for that extra overdrive look at a gear venders, or just slow down a bit on the interstate.

I have documented stats that I can make better time over the course of a 1000 mile trip doing 60 v/s 75 while towing. At 60 your using less fuel and can go anywhere from 60-10 miles further on a fill up. That extra millage will more than surpass any distance you did by going 75, but have to stop for fuel sooner.

1996 F-250 extended cab long box five speed. Home made Tymar, 203 Stat, 60 gal in bed fuel cell, 315/75's, no muffler, ebpv welded open 3" to 3" DP, Babies. 290K, still chugging, and still smoking when cold.

UPDATED 1/1/09 Replace so far. 1 LUK flywheel+clutch, 2 thermostats, 2 set of brakes, 1 set of calipers, 5 CPS, 3 sets of tires, 2 Transfer pumps, 1 Injector modual, 1 Computer, 2 Alt, 2 sets of batteries, 1 Water pump, 6 Belts, 1 PS hose, 2 Sets ball joints, 2 set u-joints, 2 carrier bearing, 2 Speed sensors, 1 oil pres sender, 1 temp sender, 4 sets of e-break cables, 1 front fuel tank, 2 rear fuel tanks, 2 set of glow plugs, 7 Glow plug relays, Oil galley o-rings, Turbo pedistal o-rings, EBPV o-rings, 3 sets of Injector O-rings, 1 Vac-pump, 1 new carpet, 1 total paint job.Total $$$ in repairs v/s miles driven = 4.6 cents per mile. Add fuel to that it jumps to 16.5 cents per mile over the life of the truck.

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