agomez

I have a 2008 mustang gt with bama tune and have a Cai also with off-road x pipe and frpp stingers but also I don't wanna lose mpg

908ssp

You'll loose in either case if you have a 3.31 in there now. Less with the 3.73 and more with the 4.11.

agomez

Okay thanks but which would go go with if u had to choose

Rjaniz

I just put 3.73 in mine a couple months ago. Before, I was running 3.31s, FRPP CAI, bama tune, and the FRPP M230S Exhaust with 20" Shelby Razors. I was getting about 23MPG on the highway, 21MPG on the backroads.

When I put the 3.73s on, I also put on a Steeda underdrive pulley, I am now getting 27+MPG on the highway (with everything from before still there). On the back roads, it's like 19-20mpg...because I love to hear it roar. :P

As for which one would be better for you, no idea...but I can tell you that I am completely satisfied with the 3.73s. No regrets at all.

agomez

Thanks for that great info and what kind of tune were you running that time when u installed the 3.73 and did you fill the difference after the installation and dis you ever run the car at the track what time did u get

Rjaniz

I'm running their 89 "I'll pass state inspection" tune and have been for a while. (I forget the name exactly, but it's their "safest" 89 tune.) I would say I definitely felt the difference.

It didn't knock my socks off but it definitely felt more peppier. Getting onto the highway is a whole new [great] experience. If you can, see if you find a few stangs with 3.73s in them and test drive. Bullitts came stock with 3.73s, I believe, and the lots probably have a new 2013 sitting around with 3.73 in them.

No, my car has never been tracked(so long as I've owned it anyway).

EDIT: Doing a quick Autotrader search using your location listed from the forum, there's a 2010GT with 3.73s not too far from you. http://www.autotrader.com/cars-for-s...22217791&Log=0 (it doesn't list that it has 3.73s, but I looked up the vin on Ford's window sticker generator and it came from the factory with 3.73s)

agomez

Okay thanks I think ill go test drive it Wednesday to see how it feels and do u happen to have video of your car takeing off

Planeswalker

Do you do alot of highway driving? If not I doubt you will notice any loss in MPG and could see an increase. What you will notice is an increase is pulling power when taking off.

At 75mph your RPMs will be around;
3.55 2233
3.73 2347
4.10 2579
This is with a manual 5spd

I see alot of people complaing that it makes 1st gear worthless, or they have to shift more. If you are one of these people trade in for an automatic.

The modular 4.6 makes it's power in higher RPMs, don't fear the gear if you want to get to your power quicker! Some cars can lose time in the 1320, ours don't.

Go with the 3.73s if you want to be more conservative for a daily driver, 4.10s for max fun factor. Feel free to ask any specific questions you may have.

Rjaniz

Sorry, no video. But in all honesty you wouldn't get any sort of information from a video aside from my exhaust sound anyway.

agomez

I only use the car for work which is only 17 miles away or when I go out but its not to far also but its hard to decide and do they 4.10s burn your tires quick cause I just bought some new ones

muscledom

You CAN NOT go wrong with 410s. Just got mine installed last week. Went from 331 to 410, really noticeable difference. Especially since I'm cammed and have less low end torque than stock. Loss in mpg is negligible.

agomez

Ive also heard when u have 4.10s on city it increases and when u drive on highway it decreases

Planeswalker

The only way it would wear your tires out quicker is if you are having to much fun with them!

agomez

True hope I decide soon

06blackvertstang

That is a huge jump in mpg!! Is it really true?

agomez

So its true about the a/c not cooling as much with the UDP

cdynaco

I love the 3.73's. Keeps me in the power band on 2 lane twisties. And in the quarter, 4.10's will require a shift to 4th.

When I let cruise control drive @ 65 on level ground I get 27mpg (100% stock). My all around (75 hwy/25 city) is 23.5.

.

agomez

Thanks good advice I think ill go with the 3.73s

Kevin509

I have 3.73s in my car and IMO theyre the perfect daily driver gear ratio. The engine still settles down nicely in 5th at 75 and i average 21 mpg to a tank in mixed driving. But when I step on it it really picks up, and downshifting to 4th to overtake on the highway really gets the car moving.

I can confirm that my car with only the gears was significantly faster than an 07 GT 5speed with CAI and tune and the stock 3.31 gears.

4.10s will make a big difference on the strip but IMO are too aggressive for a daily driver. That's just my opinion...

agomez

Okay so 3.73s it is do you guys know how much it cost too put them on