mustangergt

I am going to change my gears in my 13 auto from 3:15 to maybe 3:73.
Right now I get about 24/25 hwy at 70 to 75.
Has anyway change gears in the auto to 3:55 or 3:73?
What is your new mpg.

I will be having the Procal tune installed next friday at dealer.
Thinking of maybe just doing gears as well.

Rob72

The auto has a much lower first gear than the MT82. If you're concerned about the 1/4 and want to get the most out of every gear I has seen that a few people recommend 331s.

Mishri

i used to get 25-26mpg, now i get around 22mpg with 4.10s.

for optimal 1/4 mile times 3.31s you cross the beams at peak power, next best gear is 4.56s i believe. I just went with a good gear for acceleration while not being too high in the RPMs at highway speed.

SR71BBMustang

I have a 2012 GT Auto & just switched stock 3.15 to 3.73. It was a very nice change from stock without killing 1st gear. 3rd gear is a beast now too.

Usually get 23.5 MPG Hwy at 70MPH

Almost went with 3.90 or 4.10, but 3.73 is what most said works the best witha daily driver. I drive 14K/year.

Get a custom tune & Cold Air kit, that Coyote will run down most SS models.

Burns331

Stock for stock, the Coyote should run down/past and around SS's