Question on rear axle ratio's

robert smith · #1 (**permalink**) 06-14-2007, 03:23 PM

Am curious as to what the rev's are at, say, 65mph for the various axle ratios that members have.

**SMKSTAX** · #2 (**permalink**) 06-14-2007, 03:32 PM

3.55 rears, revvin at 1900 rpm's at 65 mph. 97 F350 stock 5-speed.

robert smith · #3 (**permalink**) 06-15-2007, 02:25 AM

Tnks, anyone with 410?

SDDan · #4 (**permalink**) 06-16-2007, 10:18 PM

Recently had back surgery, so I haven't been driving, but, as I remember 60mph was at 2000rpm and I think 65mph was just over 2100 rpm w/ 4.10 gears & stock tires (DRW).

**shu873** · #5 (**permalink**) 06-16-2007, 10:23 PM

I know with my 3:73 gear I run 2 grand at 68 on the highway. 5sp torqueshift auto tranny.

jphelzer · #6 (**permalink**) 06-17-2007, 05:27 AM

with 3.73s

cj41foley · #7 (**permalink**) 06-17-2007, 05:30 AM

, about 2000 at 70, I'm gonna go with as big a tire I can to get my revs down on the highway, hopefully help fuel mileage

**Big Tone** · #8 (**permalink**) 06-17-2007, 05:43 AM

I have an 06 F-350 DRW with 4:10s, it turns about 2200 @ 65 mph.

PSDfan99 · #9 (**permalink**) 06-17-2007, 05:48 AM

3.73's here and im at about 2,000 RPM tight at 68-70 MPH.

robert smith · #10 (**permalink**) 06-18-2007, 02:35 PM

Thanks everyone. What is the consensus on just how many more mpg approx 200 or so fewer revs would add, 1, 2??

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