[mustang_gtr_99]

top speed and gas milage wont very so much If you want to go FI in the future, I would stay away from the 4.10's unless it's an auto. I would stay between 3.73 and 3.90

 

[mustang_gtr_99]

yah, 4.10's are good. It also depends on what kind of racing you do circuit or strip.

 

[mustang_gtr_99]

I would go 4.10s. I went from 3.31s(stock) in my 06 GT to 3.73s and loved the increase in performance. I do ALOT of highway driving, 20miles one way out for college, 2-3 times a week. My new job is 13miles highway 1 way fri-sunday. 3.73s have killed me because i have a heavy foot =) and drive really fast.

If i could do it all over again, i would say **** it and go 4.10s regardless. I can't imagine the insane acceleration you get from these things! I think maybe in a year or two i will swap them out again for the FRPP 4.10s..

PS: Stay away from Motive, go for ONLY FRPP..

??? I have had motives for the last 5 years and love them? There isnt anything wrong with motive's

 

[mustang_gtr_99]

FRPP is through Motive now/ Thanks for the info, learn something new everyday. I love my motive 3.90's, no issues

 

[mustang_gtr_99]

My gears give off a little whine when I let off the throttle but it doesnt bother me and it hurt anything on the car. Just changd the dif fluid and no signs of improper wear or metal shavings. They have been in there for years now. I dont know why people have an issue with the slightest gear whine.

 

[mustang_gtr_99]

Hmmm...



3.73's OR 4.10's







Gee... Too bad there's no middle ground here....











Oh wait...3.90's

:drink
We are a rare breed