Dats1NiceMustang

so would 355's be a waste of money my car sucks on gas already

CMCs05pony

unless you have or plan to get a supercharger or turbo, I'd think you'd want to step it up to at least 3.73's if you're going to pay for a new gear ratio. also depends on your driving habits. with a shorter gear ratio, you'll lose mpg on the highway, but might actually get slightly better mpg in city driving. 3.55's probably wouldn't be all that noticible for performance or gas mileage if your car is otherwise basically stock

DragonPL

won't those gears get better acceleration though??

CMCs05pony

any shorter gear ratio will allow you to run through your rpm's and therefore gears (transmission) faster. So yeah, you'll get better acceleration. I'm just saying that if you're paying $200 for gears and another $300 to have them installed, you might as well step it up a notch to 3.73's or 4.10's. The 3.55's would be great for a FI setup though.

edit: out of curiosity, where have you found 3.55's for a Ford 7.5" rearend??

fazm

my thoughts exactly, to my knowledge there arent any 3.55s for our 7.5s

CMCs05pony

i've always like that avatar pic fazm... good angle and for whatever reason, it makes that redfire look like a different color

05BlackPony

The closest I've seen for a 7.5inch 3.55 is a 3.45

RobDurham

He could be planning on an entire a rear end swap; Shelby Auto has the heavy duty 8.8" rear end that houses a 3.55:1 gear ratio for $1199.00

Link http://www.hillbankmotorsports.com/p...6e8ac38d48065d

orion6g

A guy a local mustang performance shop said he could get me 3.55's (actually reccomended them over 3.73's and said i would definitly feel the difference). My question is: would 3.73's be too much for a FI setup in your minds?