Diesel Bombers - GEAR RATIO'S

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- - GEAR RATIO'S (https://www.dieselbombers.com/12-valve-2nd-gen-dodge-cummins-94-98/91532-gear-ratios.html)

MECHANIC

02-18-2012 12:50 AM

GEAR RATIO'S

What is a good gear ratio for worked cummins with 35" or 38" tires???? I'm running 3.54 with 35" tires....1575 RPM @ 65 MPH in overdrive... I plow snow... but in :s:summer want to cruze:s::s:

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Im thinking 4.56- 4.88

vexxxed

02-18-2012 01:17 AM

Right now in my 3500 dually with 285/75's and I'm running 4.11's. I'll be struggling going 70 at 2400 RPM's. I'm sure tires have a big difference but I would think 4.57 or 4.88 would be too low of a ratio.

wahlstrom1

02-18-2012 02:58 AM

4.10's with 36.5" rubber and a 5 speed OD ratios (didn't know what ya had?) puts you just over 1900rpm at 70mph, 1800 at 65mph.

dukeboy_318

02-18-2012 04:13 AM

yeah, no more than 4.10s,

MECHANIC

02-18-2012 10:13 PM

OK THANKS................I have an auto w/OD..so it will lower my RPM's.:tu:

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