4.10s are in! Wow. - Ford Mustang Forum
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post #1 of 24 (permalink) Old 01-17-2013 Thread Starter
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4.10s are in! Wow.

So glad I went with the 4.10s!!!!!!! What a difference. Feels like a whole new car now.

Ford should have never put 3.31s in these cars stock. should have been 3.73 or 4.10.
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post #2 of 24 (permalink) Old 01-18-2013 Thread Starter
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Also should I have a different tune made for the 4.10s or does that make any difference?

05 GT auto
4.10s FRPP
JLT stage 3 cold air
93 octane SCT tune by Brenspeed
Mac Axle backs
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post #3 of 24 (permalink) Old 01-18-2013
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No tune necessary...Just don't forget to adjust for the right gears w/ your tuner. It will throw the mph off a little...

'05 Blk Prem V6 Roush Styled, X-Charged, & Highly Modified Sold
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post #4 of 24 (permalink) Old 01-18-2013 Thread Starter
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Originally Posted by OhFiveStang View Post
No tune necessary...Just don't forget to adjust for the right gears w/ your tuner. It will throw the mph off a little...
Yeah I did that when I got home. I used my gps on my phone on the way home and i think the speedo was showing like 70 when I was actually going 55.:laughlitt

05 GT auto
4.10s FRPP
JLT stage 3 cold air
93 octane SCT tune by Brenspeed
Mac Axle backs
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post #5 of 24 (permalink) Old 01-18-2013
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Originally Posted by Red05GT View Post
So glad I went with the 4.10s!!!!!!! What a difference. Feels like a whole new car now.

Ford should have never put 3.31s in these cars stock. should have been 3.73 or 4.10.
Does it hook or spin? Any suspension & tire upgrades?


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post #6 of 24 (permalink) Old 01-18-2013
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Have they been in long enough to get a feel for the difference in MPG?
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post #7 of 24 (permalink) Old 01-18-2013 Thread Starter
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Does it hook or spin? Any suspension & tire upgrades?
If I put it to the floor it spins which I like. But I can not go all out and keep it from spinning and it is still faster out of the hole than the 3.31s.

No suspension or tire upgrades yet.

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Have they been in long enough to get a feel for the difference in MPG?
Just picked it up yesterday. I have got about 15 mpg on every tank since I bought it so I will report back.

05 GT auto
4.10s FRPP
JLT stage 3 cold air
93 octane SCT tune by Brenspeed
Mac Axle backs
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post #8 of 24 (permalink) Old 01-19-2013
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That's awesome!! I told you that you would love those 4.10s! I'm getting some Kooks LTs put in this spring! Then it's lower control arms and tires! You getting any gear whine at all? With my 4.10s I have not noticed any gas mileage reduction, I'm averaging about 19 mpg with a 93 octane Bama performance tune. Definitely one of the best mods out there! Congrats!!

2008 Mustang GT, Auto, Steeda CAI, FRPP FR500S/KR Axlebacks, Led Map Light Conversion, 255/50/17 Nitto NT555 Tires, Stock 17" Bullit Rims, Steeda Hood Struts, SCT Tuned by Bama, 4.10 FRPP, Kooks Longtubes With Catted XPipe.
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post #9 of 24 (permalink) Old 01-19-2013 Thread Starter
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That's awesome!! I told you that you would love those 4.10s! I'm getting some Kooks LTs put in this spring! Then it's lower control arms and tires! You getting any gear whine at all? With my 4.10s I have not noticed any gas mileage reduction, I'm averaging about 19 mpg with a 93 octane Bama performance tune. Definitely one of the best mods out there! Congrats!!
Glad I listened to you and anyone who suggested 4.10s! No gear whine at all. I think they did a great job with the install other than the panhard bar thing but I don't think that was their fault.


I wish I got 19 MPG! I got 15 when stock, 15 after cold air and tune and don't know yet with the 4.10s. Do you do much highway driving?

05 GT auto
4.10s FRPP
JLT stage 3 cold air
93 octane SCT tune by Brenspeed
Mac Axle backs
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Not too much HW driving. I don't drive it real hard, usually just to work and back when it's nice out. It does get off the line much quicker now though! I'm glad you don't have any gear whine, that was the biggest worry I had when I got mine in...

2008 Mustang GT, Auto, Steeda CAI, FRPP FR500S/KR Axlebacks, Led Map Light Conversion, 255/50/17 Nitto NT555 Tires, Stock 17" Bullit Rims, Steeda Hood Struts, SCT Tuned by Bama, 4.10 FRPP, Kooks Longtubes With Catted XPipe.
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Glad you are enjoying your 4.10'S I love mind, best mod yet

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post #12 of 24 (permalink) Old 01-20-2013 Thread Starter
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Originally Posted by babelfish View Post
Not too much HW driving. I don't drive it real hard, usually just to work and back when it's nice out. It does get off the line much quicker now though! I'm glad you don't have any gear whine, that was the biggest worry I had when I got mine in...
I don't drive it hard that often. But I don't just put around either. Since the 4.10s are in though I seem to get on it more especially going around corners because i like getting a little sideways. LOL! After letting the car warm up for almost an hour yesterday and my spirited driving I am guessing I might get 12 on this tank.

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Glad you are enjoying your 4.10'S I love mind, best mod yet
Same here. I love the axle backs too but that was just sound no real hp gain there I'm sure.

05 GT auto
4.10s FRPP
JLT stage 3 cold air
93 octane SCT tune by Brenspeed
Mac Axle backs
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Glad I listened to you and anyone who suggested 4.10s! No gear whine at all. I think they did a great job with the install other than the panhard bar thing but I don't think that was their fault.


I wish I got 19 MPG! I got 15 when stock, 15 after cold air and tune and don't know yet with the 4.10s. Do you do much highway driving?

Really? I was 28.5 hwy/ 25.5 city stock (3.31s). Even with the supercharger and my 3.73s I still got 25 hwy and then when I put in the 4.10s it dropped to 23 hwy/ 20 city.

Naturaly when I put my foot in it the mileage gets worse

You'll definately want to look at some lower control arms to help control wheel hop and an upper 3rd link to help avoid axle wind with the 4.10s. Ask around about the upper link. I have it swapped out in my car, but I know others who just do the lower control arms and are plenty happy.

I know that I love my 4.10s. I'm glad you like yours too

Justin
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post #14 of 24 (permalink) Old 01-21-2013 Thread Starter
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Really? I was 28.5 hwy/ 25.5 city stock (3.31s). Even with the supercharger and my 3.73s I still got 25 hwy and then when I put in the 4.10s it dropped to 23 hwy/ 20 city.


You'll definately want to look at some lower control arms to help control wheel hop and an upper 3rd link to help avoid axle wind with the 4.10s. Ask around about the upper link. I have it swapped out in my car, but I know others who just do the lower control arms and are plenty happy.

I know that I love my 4.10s. I'm glad you like yours too

Maybe I need new plugs or something. And I will look into the lower control arms.




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Naturaly when I put my foot in it the mileage gets worse

I think that is my main problem. But I don't get on it THAT often.

05 GT auto
4.10s FRPP
JLT stage 3 cold air
93 octane SCT tune by Brenspeed
Mac Axle backs
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post #15 of 24 (permalink) Old 01-21-2013 Thread Starter
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Well I filled up tonight and got 12.5 mpg. The best I have ever got is 15 and this tank had 2 times of idling for an hour. And I gave multiple rides with lots of WOT runs and did plenty of spirited driving by myself. Going to try and go easy on this tank but the 4.10s make it so fun to drive it is hard.

05 GT auto
4.10s FRPP
JLT stage 3 cold air
93 octane SCT tune by Brenspeed
Mac Axle backs
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