TASSY5

I am curious if the stock 3.55 gears are best suited for the Whipple HO. or should I consider going 3.73's, 3.90's or even 4.10's??
It is a weekend cruiser for my wife and me but want to enjoy it to the fullest on local roads, as well as the interstate.
What are your opinions?
Especially from you already SC guys. As well as your own experiences with this subject.

Thanks.

zkiller

I think the 3.73 is the best all-around perfomance gear to have for the street or racing.
You should get the Whipple first and see how you like the 3.55 gear though before changing ratios. Many are running 4.10 gears that will bring your RPMs up a little higher also.

TASSY5

thanks for the in put.

volcom8190

ive had friends that got 3.55s in their cars and are now kicking themselves that they didnt get 3.73s, but they also dont have a blower so....idk id try it out with the 3.55s first then go from there

Bluestar

3.73's FTW

Diabolical!

I'll be doing a whipple install in the coming weeks and I'm sticking with the stock gears. It's hard enough keeping tread on the tires as it is.

MustangGT0405

+1, I am getting my blower installed soon and I am sticking to the 3.55's.

With a TS blower you are making alot of power down low so you dont need as much gear.

Now if you had a centrifugal blower or turbo I would say to get 3.73s or 4.10s to help you get in your powerband faster.

To me 3.55's should be perfect for a twin screw. I will let you know if I change my mind once its installed though.

Heavyg72

Like someone else said, I would get the blower first and then see where you are. I had the gears done before my supercharger and 3.73's are the max I would go under FI. I'm just glad I didn't go any higher.

ottawapony

Do all 2005 Mustang GT have 3:55 gears as stock and also is the Posi (t-Lock) standand too. I'm looking to do a 7.5 swap to an 8.8 ,my car is automatic. Are the GT automatics and manuals gear ratio's different?

Black_06GTStang

For 2005 GT's the auto's used 3.31's, manuals were 3.55