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Discussion Starter #1
Hey i have a 2017 mustang v6 with roush axelback (not for power just for sound) a x pipe, drop in k&n filter, and MPT 93 oct tune. beside gears and porting intakes that I want to avoid for the moment because the difficulty of installation, what other mods will be good for adding power?

The next mod on my list are shorty headers.

Any other good suggestions.

Thanks for the answers.
 

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A supercharger is the most bang for the most buck you can do for a V6........other than trading it in for a 5.0, of course......:whistling:
 

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Discussion Starter #3
Yeah the supercharger would be cool but I'm on a budget. And before a supercharger I think I'll trade for a 5.0 but that is too much money right now.
 

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Do you have a manual or auto trans? Either way — gears are going to get you going in the first couple of gears more quickly. What gears do you have now?
The trouble with “over gearing” is that then you frequently have traction issues (although probably not as big a V6 issue:whistling:)....so you are into bigger wheels and wider tires to get the power to the ground.
 

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Discussion Starter #5
My car is a Auto trans, I believe that the stock gears of the car is 3.15 i have been thinking of changing them but seems that they are complicate to change and can go up wrong if the person that do the work don't know how to do it properly. Also heard that you have to change for a 8.8 rear differential and some other parts. Don't know if is as complicated as its seems.

Thanks for your time.
 

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For the 5.0 you don't want to touch the rear gears in an auto. Not sure if the 3.7L should do them or not. I'd be careful before swapping gears.
 

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Forced induction will give you the best bang for the buck. Bolt-ons add looks and sound, maybe a few HP here and there, but the payback is not worth it. You could also spray it.....
 

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For the 5.0 you don't want to touch the rear gears in an auto. Not sure if the 3.7L should do them or not. I'd be careful before swapping gears.
Correct on the 5.0, but on my wife's auto 3.7 It was literally like 5-6 10ths going from 2.73 to 3.73. A 14.8 or so stock, then it was like 14.2 with a tune, then like 13.7 with 3.73s.
 

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My car is a Auto trans, I believe that the stock gears of the car is 3.15 i have been thinking of changing them but seems that they are complicate to change and can go up wrong if the person that do the work don't know how to do it properly. Also heard that you have to change for a 8.8 rear differential and some other parts. Don't know if is as complicated as its seems.

Thanks for your time.
The gears are not something you’d want to do yourself, as the lash for the pinion gear setting is critical to avoid loud whining of the gear set.
A competent mechanic (check to see if they have experience with Fords and shimming the gears when installing and make them guarantee that the gears won’t whine when they are done) should be able to do it for you — and if they whine after that, you can always take it back and give them another shot at it.
And, yes, sometimes a bigger diffential housing is needed when you change gear sets, which does make changing the gears MUCH more expensive, as the whole rear end needs to be bought and changed out. Do you have junkyards there where any wrecked 5.0’s might be sitting there waiting for you to scavenge the differential?
 

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Discussion Starter #10
Thanks for all the info on gear swapping and for the idea to check on a Junkyard for a gear housing if I need to change the one that is in the car. For a automatic V6 what gears would be better 3.73 or 4.09 the cars is a daily driver? Want to get the best performances and mantain the practicality of a daily driver.

Thanks to all of you for yours responses! Have been of great help.
 

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Thanks for all the info on gear swapping and for the idea to check on a Junkyard for a gear housing if I need to change the one that is in the car. For a automatic V6 what gears would be better 3.73 or 4.09 the cars is a daily driver? Want to get the best performances and mantain the practicality of a daily driver.

Thanks to all of you for yours responses! Have been of great help.
You said yours was an auto trans, so I would never go deeper than the 3.73’s. I have the 3.55’s with an auto and first gear barely lasts 1/2 way across the intersection.........
 

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My car is a Auto trans, I believe that the stock gears of the car is 3.15 i have been thinking of changing them but seems that they are complicate to change and can go up wrong if the person that do the work don't know how to do it properly. Also heard that you have to change for a 8.8 rear differential and some other parts. Don't know if is as complicated as its seems.

Thanks for your time.
I believe that all of the 2015+ Mustangs have the same differential, with the only difference being the gear ratios.
 

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My car is a Auto trans, I believe that the stock gears of the car is 3.15 i have been thinking of changing them but seems that they are complicate to change and can go up wrong if the person that do the work don't know how to do it properly. Also heard that you have to change for a 8.8 rear differential and some other parts. Don't know if is as complicated as its seems.

Thanks for your time.
With the 3.15 gears, I would add a ProCharger (supercharger) and keep the 3.15's. I wouldn't add a cold air intake or headers, I'd just run the stock exhaust and catts. If a ProCharger was available when I started modding, that's what I would have done....:)
 

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^seriously?
 
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