GT Performance Mods 2005+ Mustang GT Performance and Technical Information

4:10 gears getting installed on 6/23

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Old 6/20/05, 06:14 PM
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I'm getting 4:10's installed in the Mustang on Thursday of this week, primarily because my 90 GT had 3:73's and it was a beast off the line, and secondarily because some folks have stated that this is a really good change.

Since it's going to cost $600+, I would really like to be sure that this indeed is a great mod to do. I want to have a car that JUMPS off the line and can break them loose at 10-20 MPH in 2nd gear when I romp on it, like I could with my old Mustang. Granted this car is completely different than the Fox's, and it may not respond exactly like the old one, but I want to unleash this car's torque potential at low speed.

Anyone with 4:10's care to comment here? Was it as drastic of a change as I am hoping for over the stock gears? Did it change the driving dynamics noticibly? I already have the Diablo tuner and they will be updating the tune to reflect the 4:10's at install time.

I'm already thinking of calling and having them install hood pins, tint the windows, add an exhaust system, install an oil and trans temp sensor, ooops, nevermind, I just crossed the financial threshold of eating Top Ramen for the next 2 months.

Sean
Old 6/20/05, 06:36 PM
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You will enjoy the change. It is quicker off the line. 1st gear goes by fast, as to be expected and 2nd chirps real easily. I'm pleased with the 4:10's myself.
Old 6/20/05, 07:31 PM
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4.10s going in real soon also.
Old 6/20/05, 07:47 PM
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Originally posted by mikem@June 20, 2005, 7:34 PM
4.10s going in real soon also.
Same here. Throwing on the JLT and XCAL 2 at the same time with before and after dynos. Should be fun.
Old 6/20/05, 07:54 PM
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4.10's going in soon here, too - along with some other stuff.
Old 6/20/05, 07:58 PM
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Originally posted by azoufan@June 20, 2005, 5:17 PM
and can break them loose at 10-20 MPH in 2nd gear when I romp on it,

Sean
I doubt you'll break em loose in 2nd at 10-20mph without use of the clutch, but the 4.10's in this car are truely a sweet ratio.
Old 6/20/05, 08:07 PM
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I had 4.10's installed last Friday. Now its super easy to spin the tires off the line, coming off a turn in second, etc. Great mod. DO IT! (like in Starsky and Hutch)
Old 6/20/05, 08:50 PM
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Sean - please post your driving impressions ASAP when they're in. I've been wavering for weeks now as to whether or not to do it. Steeda.ca recommended 4:10's too so I'm dying to get more feedback. I'm not too interested in the quarter mile, just seat of the pants around town driving where you can actually do some 0-60's without attracting too much attention - despite the fact that we can do it in 5 seconds. I'm curious to see if the 0-60 times drop a bit with the new gears.

So let us know - and thanks - Mark.
Old 6/20/05, 09:35 PM
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you wont regret the 4.10's

i got em months ago....forgot what it was like without em until i drove my sisters stock 05 gt...night and day difference. i pull the stock gt off the line no problem, and keep pulling up to 140 (didnt take it faster)

DO IT.
Old 6/20/05, 10:09 PM
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Originally posted by azoufan@June 20, 2005, 5:17 PM
I'm getting 4:10's installed in the Mustang on Thursday of this week, primarily because my 90 GT had 3:73's and it was a beast off the line, and secondarily because some folks have stated that this is a really good change.

Since it's going to cost $600+, I would really like to be sure that this indeed is a great mod to do. I want to have a car that JUMPS off the line and can break them loose at 10-20 MPH in 2nd gear when I romp on it, like I could with my old Mustang. Granted this car is completely different than the Fox's, and it may not respond exactly like the old one, but I want to unleash this car's torque potential at low speed.

Anyone with 4:10's care to comment here? Was it as drastic of a change as I am hoping for over the stock gears? Did it change the driving dynamics noticibly? I already have the Diablo tuner and they will be updating the tune to reflect the 4:10's at install time.

I'm already thinking of calling and having them install hood pins, tint the windows, add an exhaust system, install an oil and trans temp sensor, ooops, nevermind, I just crossed the financial threshold of eating Top Ramen for the next 2 months.

Sean
I live in AZ also so I was wondering who are you having do the install? I have my GT on order and am looking for a good shop for mods. When I owned my 93 LX, I had Turbo RX do the work, but they since have gone out of business. The only place I know of now is AMP performance, and I have never been there. Also does you dealer care about your mods for warrenty reasons.
Thanks..
Old 6/20/05, 10:19 PM
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I am taking it to AMP, it's just 5 minutes from where I work. I hear good things about them. I too used to go to Turbo RX, so I am essentially in the same boat as you. I'll be sure and let everyone know how it turns out.

Sean
Old 6/21/05, 05:30 AM
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4.10's going in on 7/1 here - can't wait!
Old 6/21/05, 06:11 AM
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4.10's going in second week of July
Old 6/21/05, 08:47 AM
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Know how you feel,

I'm scheduled for the 4:10's and a Borla catback on the 29th, had a tough time deciding between the 4:10's, 3:90's or stock but everyone who has done the 4:10's seems pretty jazzed about 'em.
Old 6/21/05, 08:51 AM
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I would think the 4.10's would be overkill for an everyday driver if that is the case, I would stay with the factory 3.55's, besides this 4.6 doesnt have the low end torque, the power band that counts is in the upper rpm range with this motor..IMO..
Old 6/21/05, 08:59 AM
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410 are great 430s better thats what i would do if i did it again.
people with 355 dont know the diffrence 410 make !
If you are ever to run slicks you have to have 410s.
Old 6/21/05, 09:00 AM
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With my plans for a SC next year, I plan on putting on 3.73 gears. 4.10 would be too much with the SC I believe.
Old 6/21/05, 09:22 AM
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the guys at procharger ran 410s and the zex 10.99 sec car ran 410s
So ask your self why you are diffrent?
Old 6/21/05, 09:24 AM
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ummm, cuz this isn't a shop car, this is also my daily driver.
Old 6/21/05, 09:50 AM
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It is only 500 rpm diffrence 70 is at 2500 rpms on mine.
373s is a crazy stay with the stock 355 if thats all you plan on doing. :nono:
I drive a everyday driver and i would go lower if i did it again so that is my 2 cents
dont be scared of 410s I was scared of the 430s and went with 410s now i would go with 430s .


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