Rear Gear change for better mpg - The 1947 - Present Chevrolet & GMC Truck Message Board Network

06-23-2017, 12:45 AM

Captainfab

60-66 Nut

Join Date: Mar 2007

Location: Coeur d'Alene, Idaho

Posts: 23,246

Re: Rear Gear change for better mpg

This is confusing....is that in D or OD?

Quote:

Originally Posted by BigRed63

Sorry for late response, was wanting to get an accurate reading before posting. OD cruise is only about 1700 and 2000 in D, this is why I'm wanting to change out my rear gears. Hopefully soon I'll get some estimates on how much it will cost.

I agree on a gear change to either 3.42's or 3.73's depending on tire size.

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