I have a 99 cobra and its my DD and I don't plan on going forced induction, and I bought a t56 magnum wide ratio. I have an xpipe catback cold air TB pullies and a tune. But that new 6 speed is just too tall of gears with the stock 3.27. If I remember correctly the ratios were.

This is my dd and I drive highway a lot and don't want to sacrifice mpgs..

1st. 2.97
2nd. 2.10
3rd. 1.46
4th. 1.1
5th. .74
6th. .50

 

With a .50 6th gear I would select 430s or 410s(minimum) for DD. (Some people may even suggest 456s.)

Here is a gear calculator you can mess to assist in your decision.
http://xse.com/leres/ss/calculator.html

 

www.paladinmicro.com has the best gear calculator I ever saw. And it has instructions in getting a new edge to 12s n/a. Great site. Someone put alot of work into it

 

Svtp did a poll on favorite cobra gears. 355 was #1. 373 was #2. 411 is not recommended. If you own a SVT vehicle you must belong to SVTP if only for reference purposes. The best resource for svt vehicles.

 

Thanks for the reply. That calculator was just what I needed to make my decision. 4.30 will be perfect!

 

Link?

Most polls/threads I have seen for New Edge Cobras (NA) on svtperformance read different (410s or 430s), especially with a T56 Magnum spec (.50 6th) transmission . . . .

 

What's a decent price on a gear install?

 

175-300 depending where you go. Free if you do it. its a learning experience tho for sure

 

Does it matter in cost with a irs rearend?

 

Not sure bro. Don't have one

 

My initial thought was 4.10's at the min. 4.30's since your not planning on going blown would be a great all around gear for you.

Was that in termi's or n/a corbras though. You also have to remember he has a t-56 tranny, not a t-45 so the extra OD gear is sluggish in his current n/a setup.

Yes its prob going to be a bit more because all of the gear installers Ive known say the IRS sucks to install on. Something else you need to remember, your gonna need to do a tune most likely in order to correct the speedo (and get some hp at the same time). I cant remember off hand which years could use a speedo gear, but then with the different tranny, theres no telling now.

 

Also the 2003-04 cobra has a shorter 6th gear at .63

I would say 4.10 or 4.30...prob leaning toward 4.10 if it was me.

 

Yea I'm still debating I have been training for a new job so I have been without much pay for a few weeks, I am also leaning toward a 4:10 just bc I don't really do any kind of racing where I'm looking for every possible second. Just that good solid fast car feel, and a gear is way cheaper than keeping my stock gear and adding FI. I'm nervous about letting other people install them and even more so trying the job myself. I've done all the work on the car from the tranny and clutch swap and the full bolt ons. I'm sure its a electronic speedo but I've already got a handheld tuner so that's no issue, I appriciate the responses guys.

 

Al has an 03 termi. And just rebuilt the t-56. I would trust his advice

 

Find someone who come recommended. Gears are like women,if you don't do it right they will whine forever.

 

Yes, I know this.. but the origional poster does not have a 03 car. he has a 99, which is not supercharged. The gears he has in it now compared to what Al suggested would not be a big difference for a n/a car like it would on a s/c car.

 

I probably wouldn't go lower than a 373 even n/a. Maybe on a gt but not the cobra. Unless it's gonna see more racing than cruising. I'm still toying with the idea of 373 in mine. Should put me at the top of 4th through the traps. As it is now, have to shift early to get there.