'01 Cobra Gears

[M.P. Cobra Fan]

I am ready to complete another mod to my car. I have been looking at a set of 4:10 gears. I want to hear from those of you who have done this. I drive 120 miles round trip to work daily and do not want to kill the interstate cruising with the vehicle. I am not worried about be able to go 150mph+, just want a car that is quicker off the line, and good for road race. Any help and opinions would be great. I have only had the car 2 months, and it was bone stock when I got it. I am trying to have some fun while I still can!

 

[tomustang]

If you're going with road race, 3.73 would be hitting high on the gearing, but I have no problem with it daily driving or racing


you can still choose 4.10's but it hurts the track outcome, but it's greater on the street

 

[SVT32VDOHC]

4.10's will be good. 80MPH is sitting at 3K with my Cobra.

 

[4.6andSlicks]

I'm doing 3.73's this spring on my '01 Cobra and here's the calculations I used to decide what I wanted. (3.27 is the stock gear, Tremec 3650 is the stock transmission)

4th gear @ 40 mph w/3.27's = 1700 ... w/3.73's = 2040 ... w/4.10's = 2125
4th gear @ 30 mph w/3.27's =1275 ... w/3.73's =1530 ... w/4.10's =1594


5th gear @ 50 mph ... w/3.27's = 1400 ... w/3.73's = 1680 ... w/4.10's = 1750
5th gear @ 60 mph ... w/3.27's =1680 ... w/3.73's = 2016 ... w/4.10's = 2100
5th gear @ 70 mph ... w/3.27's =1920 ... w/3.73's = 2352 ... w/4.10's =2450

3.73's give a 20% increase in RPM
4/10's give a 25% increase in RPM

 

[LaserSVT]

I like the 3.73's. I spend alot of time at 80mph and that only puts at 2500 rpm and 22mpg if I had 4.10's id be at almost 3000 and I am sure it would hurt the mileage. I can still spin the tires all the way through second and bark them in third. You probally have 25-30 more horses so I would go 3.73's on yours.
Just my .02

 

[M.P. Cobra Fan]

Thanks for the help guys. I really had not thought much about 3.73's. Does not sound like a bad idea. I do spend a lot of time @ 80mph. Damn.

Any more thoughts would be greatly appreciated.

 

[GettinThere]

...I do spend a lot of time @ 80mph...

I have 4.10s and love them. But 3.73s are probably better if you spend a LOT of freeway time at 80 mph.

 

[SVT32VDOHC]

I had two Cobra's. Identical mods except gears

97 Cobra 3.73's....13.99@102MPH

96 Cobra 4.10's....13.54@106MPH

Just FYI

 

[M.P. Cobra Fan]

Great info guys. thanks a lot. Anyone road race with these gears?

 

[nosjunke]

I love the 4.10s in my 01 Cobra. I'm glad I went with those and not the 3.73s