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Old 08-13-2014, 10:27 AM   #1
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Need definitive answer, New gears!

Hello all,

I'm looking to either go 4.10 or 3.73 in my 2014 V6 AUTO. I also plan on adding the one piece drive shaft, as well as tuning it all so it works flawlessly!

Here is my conundrum, I have no idea what I NEED to buy! These ideas of modding my pony keep making my wallet scream and as such racks up a pretty big total.

Besides the actual gears and drive shaft, what else is recommended? I've read about a "Tlok" but have no idea what that is (I'm a noob)! I also need a tuner, but again has no idea where to go with that... And as a bonus 3.73 or 4.10? Mpgs don't really matter to me, but power/performance does, I'm looking for the best "push you into your seat" gear that also allows for the pony to gallop at its best!

And to clearify why I want these added, I can't believe that a car as power as this is limited to such a ridiculous limit. I bought my pony for its looks and its performance, but honestly ford keeps these horses in the stable fresh from ten factory! Unless you have one ordered that is.
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Old 08-13-2014, 10:29 AM   #2
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When I do gears it will be 3.73's. I think for a DD 4.10's are too much.
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Old 08-13-2014, 11:28 AM   #3
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Soc man is correct. Daily drivers do best with 3.55-3.73 gears. 4.10s for bragging rights and strip use.

Lookup the QTR mile chart on the thread "Truth About Gears"

I had 3.55 in my V6/auto , in my new GT manual I have 3.31 that work just fine for toss me back in the seat. The V6 lacks torque down low and needs more gear then the V8.

The truth about gears..
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Old 08-13-2014, 11:35 AM   #4
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this is the tuner I use on my 2014 V6...works flawlessly
Bama SF3/X3 Power Flash Mustang Tuner w/ 3 Free Custom Tunes 38018 (11-14 V6) - Free Shipping
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Old 08-13-2014, 11:38 AM   #5
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This is very quick insight, 3.73 gives faster 0-60 then 4.10 ; so better for the street. And forget the DriveShaft, I never needed it. That is for if you plan to go faster than 130 and you cant even do that in a QRT mile.

Final drive ratio: 3.73:1

Seconds - MPH
1.8 - 30
3.1 - 40
4.1 - 50
5.2 - 60
7.3 - 70
8.9 - 80
10.8 - 90
13.9 - 100

1320 - 14.0 @ 100.3 MPH

Speed in gears
1 - 36 MPH
2 - 61
3 - 93
4 - 127
5 - 157
Drag limited - 155 MPH


Final drive ratio: 4.10:1

Seconds - MPH
1.6 - 30
3.1 - 40
4.1 - 50
5.9 - 60
7.3 - 70
8.8 - 80
11.5 - 90
13.8 - 100

1320 - 14.1 @ 101.1 MPH
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Old 08-13-2014, 12:11 PM   #6
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How bad is the gas mileage affected when going to 3.73's or 4.10's from the stock 2.73's?
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Old 08-13-2014, 12:15 PM   #7
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How bad is the gas mileage affected when going to 3.73's or 4.10's from the stock 2.73's?
Its very easy to find out reduction in true Hiway hauls. Use the RPM chart for a speed in a gear. Then put your car in 5th instead of 6th on the hyway and set cruz control to the RPM that you would be in for say 70mph. Then reset your MPG meter and see what you get over a 5mile or so run.
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Old 08-13-2014, 12:18 PM   #8
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Allow me to add a few more details, i don't do drag strips or any of those things that judge the car in fractions of a mile. I just like to Drive fast and enjoy the speed! I see that 3.73 would be best in my case as its .2 secs slower to 30MPH but faster by .7 sec at 60MPH! but thats no the end all be all.

I appreciate all the feedback in here about the gears, but id also like to know what else is needed when the gears are installed!
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Old 08-13-2014, 12:22 PM   #9
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Has anyone had any experience with the 3.55's? Is there much difference between those and the 3.73's?
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Old 08-13-2014, 12:41 PM   #10
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Originally Posted by mckhammer View Post
Has anyone had any experience with the 3.55's? Is there much difference between those and the 3.73's?
I had 3.55s in my V6, because a good dealer can take the 3.31 ford stock tune and lower the tire size till the Speedometer matches the GPS speed. This way the car was not queered when I traded it in. You don't want to have to pay to put old gears back in the car at trade in and 3.73 and 4.10s will cause your trade in value to really sink low; as its now a performance car that has been beat in the opinion of the buyer.

3.55s were just still fine for everyday Joe or Josie to buy when I traded in.
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Old 08-13-2014, 12:46 PM   #11
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Originally Posted by ALex_6ix View Post
...
I appreciate all the feedback in here about the gears, but id also like to know what else is needed when the gears are installed!
You should get the gear-set with ring and pinion, and the install kit with the new bearings if you want it to last. WHO you have install them will determine if they last 100K or more, or only 15-25k miles. Gears should be put on by those that know how to shim them. The Tlok is a high end posi-traction, you dont need it at your power level, you already have a factory posi if you got a 2011+

Ford Racing Traction - LOK Limited Slip Differential - 28 Spline 7.5 in. (79-85 V8; 86-10 V6) at AmericanMuscle.com - Discontinued
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Old 08-13-2014, 12:50 PM   #12
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The place I went to here in Socal said he would only do the job if he could replace everything. My car only has 3400 miles on it and he still wanted to change everything. He didnt charge more for doing it, for him its peace of mind that every thing is fresh. Ask your installer what he would want to change. Maybe you buy the ring and pinion and let him get all the rebuild parts.

Make sure you use a highly qualified installer. A bad install is a ticking time bomb in your diff...
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Old 08-13-2014, 04:12 PM   #13
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Originally Posted by ArtU View Post
I had 3.55s in my V6, because a good dealer can take the 3.31 ford stock tune and lower the tire size till the Speedometer matches the GPS speed. This way the car was not queered when I traded it in. You don't want to have to pay to put old gears back in the car at trade in and 3.73 and 4.10s will cause your trade in value to really sink low; as its now a performance car that has been beat in the opinion of the buyer.

3.55s were just still fine for everyday Joe or Josie to buy when I traded in.
Art

Did your v6 first have the 2.73's? Before I spend that kind of money, I want to notice a difference. But I agree, adding crazy gear ratios like 4.10's compared to stock makes the buyer think twice.
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Old 08-13-2014, 04:49 PM   #14
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Originally Posted by mckhammer View Post
Did your v6 first have the 2.73's? Before I spend that kind of money, I want to notice a difference. But I agree, adding crazy gear ratios like 4.10's compared to stock makes the buyer think twice.

Of course you will notice a difference. Will it be worth it for YOU...only you can tell that and you have to get the gears to find out. Every one I ever talked to who did gears loved them.
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Old 08-13-2014, 05:24 PM   #15
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Originally Posted by mckhammer View Post
Did your v6 first have the 2.73's? Before I spend that kind of money, I want to notice a difference. But I agree, adding crazy gear ratios like 4.10's compared to stock makes the buyer think twice.
Yes, I went to my dealer to get 3.31s and the Ford Racing parts guy there said I would be disappointed in the difference and I should use 3.55s and his tech could tweak the tire sizes on the 3.31 stock Ford tune to get my speedo very close. So I took the stock tune they tweaked and saved it, put in my Steeda and MPT tunes, then before trade-in put the Dealer done Factory tweaked tune back in.

Also when doing it, put a kewl rear axle cover with dual drain and fill holes. Good to add any extra friction additive in the next day or so after the change if you need it to get the Posi to not "woo" on tight cornering slow.

http://www.latemodelrestoration.com/...rential-Girdle

I paid the higher prices to have my dealer do it, and keep my Axle warranty they used Ford parts.

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Old 08-13-2014, 05:35 PM   #16
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Originally Posted by ArtU View Post
Yes, I went to my dealer to get 3.31s and the Ford Racing parts guy there said I would be disappointed in the difference and I should use 3.55s and his tech could tweak the tire sizes on the 3.31 stock Ford tune to get my speedo very close. So I took the stock tune they tweaked and saved it, put in my Steeda and MPT tunes, then before trade-in put the Dealer done Factory tweaked tune back in.

Also when doing it, put a kewl rear cover with dual drain and fill holes. Good to add any extra friction additive in the next say or so after the change if you need it to get the Posi to not "woo" on tight cornering slow.

http://www.latemodelrestoration.com/...rential-Girdle

Art
This might be a dumb question, but wouldn't compensating with tire size to get your speedo very close with the 3.31 factory tune, with your 3.55s in the car, pretty much now drive like you had 3.31s anyways?



:Edit:
I should have read the whole post! Now I understand why you did it. Like I said....dumb question. Lol

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Old 08-13-2014, 05:50 PM   #17
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Ahhhh, they were not changing the size of the tires on the wheels of the car, they were tweaking the tire size and revs per mile on the Ford Calibration Tuner that tweaks and loads stock Ford tunes.
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Old 08-13-2014, 06:07 PM   #18
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Ahhhh, they were not changing the size of the tires on the wheels of the car, they were tweaking the tire size and revs per mile on the Ford Calibration Tuner that tweaks and loads stock Ford tunes.
Gotcha.

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Old 08-13-2014, 06:13 PM   #19
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Originally Posted by ArtU View Post
Yes, I went to my dealer to get 3.31s and the Ford Racing parts guy there said I would be disappointed in the difference and I should use 3.55s and his tech could tweak the tire sizes on the 3.31 stock Ford tune to get my speedo very close. So I took the stock tune they tweaked and saved it, put in my Steeda and MPT tunes, then before trade-in put the Dealer done Factory tweaked tune back in.

Also when doing it, put a kewl rear axle cover with dual drain and fill holes. Good to add any extra friction additive in the next day or so after the change if you need it to get the Posi to not "woo" on tight cornering slow.

http://www.latemodelrestoration.com/...rential-Girdle

I paid the higher prices to have my dealer do it, and keep my Axle warranty they used Ford parts.

Art

What shop did your gear swap? I see that you live in NW Ohio and I'm in that area.
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Old 08-13-2014, 06:18 PM   #20
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What shop did your gear swap? I see that you live in NW Ohio and I'm in that area.
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