axle gears

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Oct 1, 2010 | 12:34 PM

#11

CSIPSD

Diesel Bomber

Joined: Sep 2007

Posts: 7,638

Likes: 638

From: Bend OR

I would go 4.56 if it were me... I am running 37's with 4.30's and its about perfect.

Oct 7, 2010 | 08:46 PM

#12

Bigred7.3

Thread Starter

Diesel Enthusiast

Joined: Aug 2010

Posts: 392

Likes: 3

From: Davie, fl

Yea that sounds good wit the 4.56

Oct 12, 2010 | 09:47 PM

#13

American Thunder

Diesel Fan

Joined: Jun 2010

Posts: 55

Likes: 4

From: New Paltz, New York

Quote:

Originally Posted by cummins bronco

i am running 4.10s with 35s and i find them too low, on the highway it is turning too much rpm, i think with a good tuned up diesel you are far better off with higher gears than lower.

and you can't really compare gasser gearing to diesel they run in totally different rpm ranges.

I have 3.50s with 35s, but no overdrive, and I'm turning about 1900 rpm at 55 mph. I'd like to drop the rpm down some more, so I'm in search of a Dana 61 front axle with 3.07s. Once I get one, I'll swap in 3.00s into the 9" rear and convert it to 8-lug. My truck has power to spare, so deep gearing is just wasting fuel.