'01 Cobra Gears

M.P. Cobra Fan

New Member

Aug 10, 2007

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Atlanta GA

Oct 2, 2007

#1

• Oct 2, 2007

• #1

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

Psychotic Member

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Jun 8, 2000

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McLean Hospital

Oct 2, 2007

#2

• Oct 2, 2007

• #2

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

waiting for the next hack atta

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Nov 22, 2001

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Motor City

Oct 2, 2007

#3

• Oct 2, 2007

• #3

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

 

4.6andSlicks

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Aug 22, 2006

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Central Connecticut

Oct 2, 2007

#4

• Oct 2, 2007

• #4

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

Got FB banned again for saying nards

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Nov 29, 1999

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Oct 2, 2007

#5

• Oct 2, 2007

• #5

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

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Aug 10, 2007

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Atlanta GA

Oct 3, 2007

#6

• Oct 3, 2007

• #6

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.

 

G

GettinThere

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Jul 29, 2005

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Central Texas

Oct 3, 2007

#7

• Oct 3, 2007

• #7

M.P. Cobra Fan said:

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

Click to expand...

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

waiting for the next hack atta

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Nov 22, 2001

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Motor City

Oct 3, 2007

#8

• Oct 3, 2007

• #8

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

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Aug 10, 2007

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Atlanta GA

Oct 6, 2007

#9

• Oct 6, 2007

• #9

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

 

nosjunke

New Member

Jul 14, 2003

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Pope field, NC

Oct 7, 2007

#10

• Oct 7, 2007

• #10

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