3.55 or 3.73's in a 2006 auto GT 4.6, mpg?

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05-11-2016, 05:48 PM

HFCA

Thread Starter

Join Date: May 2016

Location: CA

Posts: 23

3.55 or 3.73's in a 2006 auto GT 4.6, mpg?

Any experience? Has the stock 3.31's which seem fine, and 20" wheels, Thanks guys!

05-11-2016, 07:57 PM

Simon1

5th Gear Member

Join Date: Dec 2006

Location: Redding, CA

Posts: 4,552

I doubt you will notice a difference going to 3.55. 3.73 wok give you more and mpg will be negligible.

Even going to 4.10 in my 5 speed I still got 23-24 mpg on the freeway.

05-11-2016, 08:34 PM

proeagles

4th Gear Member

Join Date: Dec 2008

Location: LA

Posts: 1,320

The automatic is better geared for 3:55.

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