One final time before i buy! - Ford Mustang Forum
 
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post #1 of 6 (permalink) Old 10-06-2011 Thread Starter
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One final time before i buy!

3.73 or 4.10 or other options. I have a 2004 mustang gt auto. with catback tb and a cai. dont wanna kill my gas mileage to much but want real gains. has anyone done it and have stats of new 0-60 or anything like that. also do i need a deferential? please help lol!!

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post #2 of 6 (permalink) Old 10-06-2011
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you have a differential, you only need a new ring/pinion and have a pro install it: either ratio will give noticeable good results..it won't kill your milage, it might actually improve it since the car won't work as hard to get moving, now if you drive 90mph everywhere you go then all the gear in the world won't matter.

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post #3 of 6 (permalink) Old 10-06-2011
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4.10's. Dooo eeeet!


2001 GT Convertible
/1967 Coupe
All the usual bolt-on's /200 I6, C4

And a few Explorers too... 2008 4.0 XLT 4x2, 1996 XLT 5.0 4x2, 2003 Sport Trac XLT 4.0 4x4
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post #4 of 6 (permalink) Old 10-06-2011
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4.10s period. And it will reduce your mileage, only on the highway though. It's not a drastic loss of mpg though. The acceleration and fun factor more than make up for the loss in a few mpgs.

And you might also need the install kit, maybe check the bearing kit out too.

1997 SVT Cobra. Mangaflow Off Road X, mils, Ford B Springs, Steeda Tri-ax

1997 GT Rio Red: PI intake, bbk cai, SCT tuner (Brenspeed tune), bbk catted x pipe, flowmaster super 44's, MSD coils, H&R lowering springs, M&M CC plates, tokiko shocks and struts. Sold.
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post #5 of 6 (permalink) Old 10-07-2011 Thread Starter
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i also have only 29,xxx miles on it would im letting a shop install it what else would i need? gears diferential and bearings? maybe ring and pinoin?
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post #6 of 6 (permalink) Old 10-07-2011
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Quote:
Originally Posted by StrizzyStang04 View Post
i also have only 29,xxx miles on it would im letting a shop install it what else would i need? gears diferential and bearings? maybe ring and pinoin?
Ring and pinion are the gears, which is what you are replacing. Your list is as follows...

1) Gears.
2) Master bearing kit, aka "install kit".
3) Fluid. 75w140 I think is what was specified on the box when I bought my FRPP 4.10 set, but that was a while ago and I'm not entirely sure anymore so doublecheck that. It takes about 3 bottles to fill if I remember correctly. Also, 1 bottle of friction modifier; you'll find it on the same shelf as the gear lube.

That's it, unless you want to pick up a Trak-Lok rebuild kit, which I think would be unnecessary on a car with only 29K on the clock.


2001 GT Convertible
/1967 Coupe
All the usual bolt-on's /200 I6, C4

And a few Explorers too... 2008 4.0 XLT 4x2, 1996 XLT 5.0 4x2, 2003 Sport Trac XLT 4.0 4x4
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