I am thinking about replacing my stock gears in my 1999 cobra mustang. It is a second car and I want to put in 4.10's. Any advice on this and if so does anyone know someone in Orlando ,Florida who can do this?
gearing for 1999 cobra mustang
- Thread starter DansCobra
- Start date
minimun 4.30's
Another vote for 4.30s. If you want to be quick and still have driveability, anything less would be a waste.
i wish I would have went with 4.56
4.30
i have 4.10s but thinkin bout going with some 4.30s when i build the rear end
Holy crap, 4.56s ! 
I've got 4.10s and it seems like I'm in first gear for like 10 feet...
I've got 4.10s and it seems like I'm in first gear for like 10 feet...
definately...4.10 is a lot for big power at least...im not even going to touch my gears...but thats mematt888 said:Holy crap, 4.56s !
more power to the guys with 4.30's and 4.56's and 9.56's
I think it depends on the type of driving you intend to do. On the "Road Course" you may run out of gear w/ 4.10's. We fell that an agressive track like Watkins Glen would benifit from 3.73's or maybe 3.90's. Just my opinion.........
Rapid Ralph said:
Funny you mention that because I was running at Willow Springs raceway in CA last October and was not liking my 4.10s at the end of the 1/2 mile front straight away (you enter that section going about 75-85mph in my heavy ass vert). They are awesome gears through the turns though!
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4.10's or 4.30's if daily-driven.
TheGord said:
Here's a similar thread that I made last summer. Very informative. I chart the torque to the wheels vs. gear vs. speed for various differential gears.
Graphs of wheel torque vs. speed for various gears...
I got the 410's but I should have picked the 430's instead.
01cobravortech
Banned
CobraG said:
Chicken
4.30s. If you're daring 4.56
Screamin Cobra said:
The Torque curve of a N/A Cobra is not even vaguely the same as a roots blown 03. Your car has torque on the bottom end, whereas ours don't, so it has to be made up through gearing. That's why we run such steep gearing.
4.30s are no problem. I use 1st gear all of the time, but I can also use 2nd and skip shift to 4th when I feel like it. 4.56s would be fine with me also.
dannygcobra
New Member
It will basically be a weekend car. I want gears that will help the intial accelaration. It seems that I need to get up to around 3000 rpm before I get the bulk of the power. I want a quick take off in first. Will 4.10's give me that without spinning the tires to much?
dannygcobra said:
4.10s will allow you to take off as fast as your tires will allow in first gear, even from an idle roll.
check out this chart I made (in that other thread that I supplied a link to) for the torque to the wheels vs. speed for stock gears versus 4.10s:
Here si one versus rpm:
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