ok...Mach1 comes stock with 3.55 but i was thinking of going to some 3.73's

should i upgrade or just stay at 3.55? What would be advantage/disadvantage?

 

don't bother. unless daddy is paying for it, it's a waste of money for such a small jump.

 

I doubt you would really even notice. The difference is .18 tire rotation, you could squeeze bigger tires on for probably the same difference! That would be less of an improvement than a K&N air filter. If you are going to do gears in a 2001+ Mustang get 4.10's they turn the same RPM's as a pre-2001 with 3.73's

 

I wouldn't say that..... You might be able to notice a little difference. But it wouldn't be worth it to go from 3.55 to 3.73 unless it was being done for free. Just go with some 4.10s.

 

Mach I like the 3.73's on mine but with it being the pre 2001 they are talking about, I believe mine was an upgrade from 3.23. Somebody sass me if I'm wrong but You should go with 4.10's maybe 4.30's with how you're driving it. You'll just lose your highway mileage if you go much over 4.10.

 

They come with 3.27s stock

And the difference between 4.10 and 4.30 is only a couple hundred RPM I believe....

 

Thanks for clarifying that for me. I knew the difference in 4.10's to 4.30's. not a huge jump but a slight noticeable.

 

4:10's or nothing. 3:55 to a 3:73 is nothing on that car.

 

Exactly. Let me know how the aluminum drive shaft goes for you too. I've been kinda thinking about one but hesitant about it too.

 

If you plan on supercharging it then get 4.10s if you plan on making an N/A beast get 4.30s. It wont hurt your gas mileage that much. Dont buy into all that crap .