3.90's On An 06 Gt?

[Pokageek]

I noticed these cars lack a little low end. Anyone have 3.90's installed? will they lower 0-60 times? How about the qm difference? Bad for long drives? Thanks in advance.

 

[DeadLifter]

I just put 4.10's in mine Friday. It runs a little about 1,800 to 1,900 rpm's at 55. I might have lost about two miles per gallon. I was going to get 3.73's because I was worried 4.10's would be too much, but I'm glad I decided to go with them now.
Are you going to do the install? If so I'd recommend Ford Racing 4.10's. I didn't even have to re shim.

 

[Pokageek]

Thanks for the reply man. Thats good to know. I will have RNH performance install them in PA. So how is 1st gear? Do you have real good tires on it that grip?

 

[DeadLifter]

I have 275/40/18 Summitomos. (Think that's how ya spell it.) I haven't really tried any hole shots, but it hooks up pretty good if i stomp it at about any rpm unless I'm on real smooth pavement.

 

[Pokageek]

I wonder if they fit on stock 18" (18x5 I think) polished bullitts? I may do a search to see the best size.

 

[Dugl]

Anyone have 3.90's installed?

We have a 98 with 3.90's (replaced 3.27)and I am seriously considering putting a set in my 2005 (replace the 3.55) At 75 mph, my rpms are about 2500 with 16" rims and stock tires. (225x55x16) The acceleration is great with a little sacrifice on top speed.