everyone says get the 4.10's for an auto. I have a auto but i also do a lot of freeway driving everyday. what would be a better gear ratio to make my stang faster without pushing up the rpm's and destroying my MPG's when i'm cruising at 75mph???

 

Then drop to a lower gear, come on you knew that. 3.73's put me at arround 2350-2400 at 70mph

 

If I put 3.73's in a auto would I still need a LSD?

 

If i understand gears right it will not "destroy" your MPG. You will notice all little dip in MPG but not enought to really worry about. Maybe 1 or 2 miles less per gallon...maybe Im wrong but I dont think I am. You could do 3.73 for an auto but that is going to make your first gear a very short gear.

Matthew

 

You don't need one even with the 4.10's, but i makes since to do them at the same time so you don't have to pay someone twice to do the labor inside the rear end.

 

it will make it really short even on a auto? how short are we talking? what would be the rpm's if i'm cruising at 70mph?

 

i guess my reply didnt go through.


the 3.73's wouldnt make your first gear shorter then 4.10- it would be longer. with 3.73 you would lose maybe 2-3mpg TOPS at highway. you might actually gain some around town. go for it, its worth it!

 

thats what i run at and im stock
what does this mean
and how much are gears

 

yea the 373 would be longer than the 410's..........i think i decided to go with 373's on my auto for all practical purposes and a mix of fun along with it

 

Yeah I decided to get the 3.73's. Seems like they would add a boost and also stay within reason for my DD. Do you recommend getting a LSD for those gears?