3.15 to 3.55 worth it
06-26-2012, 02:59 PM
#21
1st Gear Member
Join Date: Apr 2012
Location: CA
Posts: 67
When I had my Crown Vic, I went from 3.27 to 3.55 and it was a noticeable difference, totally worth it! As far as having to re tune it, it is not necessary, it will work fine, but for optimum shifting a re tune will be necessary.
06-26-2012, 03:57 PM
#22
5th Gear Member
Join Date: Mar 2006
Location: ATL
Posts: 2,955
06-26-2012, 09:52 PM
#25
Thread Starter
Join Date: Jul 2011
Location: Ca.
Posts: 9
learning, I'm glad to hear from someone that has the 3.55 in a new GT and likes it.
How does it launch off the line?
Do you have 235 tires or did you go with wider ones?
I'm thinking I would like to put in a 3.55 and go with 255s all around.
How does it launch off the line?
Do you have 235 tires or did you go with wider ones?
I'm thinking I would like to put in a 3.55 and go with 255s all around.
06-27-2012, 05:13 AM
#27
Join Date: Jun 2012
Location: Mn
Posts: 26
I went with the 3.55 as I did not want to purchase new tires. The stock tires stick and throws your out of the hole hard. Shifting seems dead on. I will have to check rpms at higher speed with cruise on. Seems like if I am going faster than 60 I have my foot on it screwing around.
06-27-2012, 02:51 PM
#28
2nd Gear Member
Join Date: Jun 2009
Location: Georgia
Posts: 195
I have had my 3.55s in for about 6 months, I think. Completely satisfied. I posted a spreadsheet awhile back that shows and auto with 3.55 has about the same overall gearing as a manual with a 3.73, at least in the lower gears. It is plenty quick!
06-27-2012, 03:14 PM
#29
5th Gear Member
Join Date: Mar 2006
Location: ATL
Posts: 2,955
Where did you get your car dynoed?
06-27-2012, 03:35 PM
#30
2nd Gear Member
Join Date: Jun 2009
Location: Georgia
Posts: 195