Gears for better mpg but still able to pull

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Aug 10, 2012 | 09:50 PM

#16

AH64ID

Registered User

Joined: Nov 2007

Posts: 4,737

Likes: 4

From: Kuna, Idaho

Quote:

Originally Posted by Gr8tWhite

It is an AD.
Compared to the .73 of the NV trans I have driven, it is a little wound tite on the hwy.
I didn't know that the o7 had a .79 until after I got it. I was expecting the .73 .

Gotcha. The last of the 5.9's have the .74.

I would love to have the .79 in my NV5600. My dad's 06 has a lot more pulling power in 6th from the gearing, but it sure is nice when empty.

Aug 11, 2012 | 03:11 AM

#17

DaveB.inVa

Registered User

Joined: Jan 2006

Posts: 776

Likes: 1

From: Nickelsville, Va

I don't know how many 2007 5.9's got the AE G-56. Mine is one and was built in early December 2006. For what I do the .74 OD ratio works great. When I tow I don't go far and rarely get to 65 mph. With my tires I can run in 5th at a little higher speed and still keep my rpm within reason.