Rear gear change?

Bounty Hunter · Jan 7, 2007

I have a 2003 Yukon with 5.3L, 2wd, with 3.73 rear gears.
I was wondering if 3.73's are normal. I was thinking about going to 3.42 range. This would help with mileage, but I am afraid the get up and go would be gone. Anybody done this swap? Thanks

diehrd · Jan 7, 2007

You could also just change tire size to affect rear ratio..BUT I suspect daily driving would suffer for gas mileage..

I get about 15.2 to 15.6 mixed driving...BUT I do drive posted limits or close to them and just that alone helps MPG a lot..

Bounty Hunter · Jan 7, 2007

20's already

Forgot to mention we have 20's on it already.
We average about 14.3 daily and 15.6-16 hwy.
I just feel we can get better mileage. Do have the K&N FIPK kit no programmers though. With the 5.3 it doesn't have set you back in the seat power, so I would like better mileage.

When I can hook up to my 32'TT and run 80mph w/ my 1ton Dodge and still get 18 mpg this turd oughta do better. Just my opinion though.

diehrd · Jan 11, 2007

Get a custom tune designed for gas mileage.

Bounty Hunter · Jan 11, 2007

Custom tune?

Unfamiliar with a custom tune. How do I go about getting one of them? Thanks

diehrd · Jan 12, 2007

Look up wait4meperformance .. he does custom tunes ,,Tell him this guy (Copy and paste) [email protected] , referred you..

Oh here is a link to his site
http://www.wait4meperformance.com/

My suggestion is to BUY a complete PCM..Then you will have 2 , the one from the factory and the new tuned one from him..Last truck i had was a 97 2dr Tahoe with the 5.7 i paid 185.00 for the pcm tuned .

Bounty Hunter · Jan 12, 2007

Thanks just contacted them.

Rear gear change?

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