3.55 Gear Upgrade worth it? - Mustang Evolution

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Old 01-13-2015, 09:16 PM   #1
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3.55 Gear Upgrade worth it?

Hey guys I just saw 3.55 gear on clearance on AM and was wondering if I were to install them on my 2014 GT with Track Pack (I think it's 3.73 gears) if I were to notice a difference. Thank you for the advice in advance! Click image for larger version

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Old 01-13-2015, 09:27 PM   #2
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What difference are you looking to make exactly? Or in other words, what do you think going from 3.73 to 3.55 will do for you?

Also, stick to Ford Racing gears.
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Old 01-13-2015, 09:34 PM   #3
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What difference are you looking to make exactly? Or in other words, what do you think going from 3.73 to 3.55 will do for you?

Also, stick to Ford Racing gears.

"Wake Up Your Pony. Installing a set of steeper gears is a great way to get your Mustang into the power band quicker for improved low end torque and faster acceleration off the line."

This is what it says and just wondering how much different it really is.


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Old 01-13-2015, 09:49 PM   #4
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your track pack 3.73s are steeper than 3.55. if you're looking for the low end torque/faster acceleration, you'd be downgrading your mustang by swapping to 3.55s.
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Old 01-13-2015, 09:52 PM   #5
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your track pack 3.73s are steeper than 3.55. if you're looking for the low end torque/faster acceleration, you'd be downgrading your mustang by swapping to 3.55s.

This is why I'm glad I asked! Thanks man... Just trying to figure out an upgrade to help the HP or Low end Torque


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Old 01-13-2015, 09:56 PM   #6
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I'm not sure what your performance mods are but a custom tune is always a good place to start.
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Old 01-13-2015, 10:32 PM   #7
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what have you done to your mustang so far?
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Old 01-14-2015, 08:34 AM   #8
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what have you done to your mustang so far?

Just cosmetic stuff so I wanted to start with engine or gear work


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Old 01-14-2015, 11:19 AM   #9
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i would get a tune if i were you at the very least, it'll wake your car up quite a lot. what are your plans for the car?
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Old 01-14-2015, 01:10 PM   #10
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I've got a 14 TrakPak car with manual trans and can tell you that it is like night and day having a tune vs. stock. That should be the first thing you do to your car to help performance. I think a good tune is worth about 20rwhp.
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Old 01-14-2015, 03:19 PM   #11
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What they said CAI and Aluminum drive line.
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Old 01-14-2015, 04:07 PM   #12
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What they said CAI and Aluminum drive line.
I didn't think I'd ever say this, but I think for the Coyote motor a CAI is a waste of money.
When I first joined this site my experience with CAI's was limited to a 97 SVT Cobra and my tow vehicles for my drag car. In all three of the vehicles the CAI made a big difference, in both performance and gas mileage.
My 14 TrakPak car has an Airaid CAI with SCT tuner (I bought it used with 2700 miles and it came with the CAI/tuner) and when I took it into the dealer for service work I took the tune out. When I took the tune out of the car it was not very responsive, just lacked the get-up-go it had before I took the tune out. On my way back home after the service work was done I really put my foot in it, and it just didn't have much above 6000rpm where before it would really come on after 6000 and be going strong till 7500rpm. When I let off the throttle the check engine light came on........so I drove home. When I got home I plugged the SCT tuner into the car and came up a code that showed a lean condition on bank #1.......I cleared the code and called and talked with SCT the next morning. They told me that this is sometimes happens when you put a CAI on the car without a tune and that the car may even loose hp/tq with a CAI and stock tune.
I put the tune back in and couldn't be more happy, the car is back to its old self. So, with that said I'd stay with your current stock CAI and maybe put a K&N filter in place of the stock filter and get a tune.
There are a number of people on this site that say an aftermarket CAI is a waste of time..............I am now a believer that you should leave the stock CAI alone, and spend the money on something more useful, like something to make the shifter perform better......blowfish makes a neat support for the stock shifter and also doubles as a drive line hoop when you change to one piece drive line (which is what I am going to as soon as my Shaftmasters drive line gets here) which is really needed once you dispose of the two piece drive line.............IMHO
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Old 01-15-2015, 02:50 AM   #13
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You are right about CAI will make the check light come on if it is set up for tune. I also have Airaid and it came with reducer for going back to stock. I have shaftmasters also great piece as for the shifter its a little more money but I would check out MGW before I spend money on blowfish. Shifter comes complete very precision made and give forum discount.
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Old 01-15-2015, 10:03 AM   #14
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You are right about CAI will make the check light come on if it is set up for tune. I also have Airaid and it came with reducer for going back to stock. I have shaftmasters also great piece as for the shifter its a little more money but I would check out MGW before I spend money on blowfish. Shifter comes complete very precision made and give forum discount.
Yes, I just didn't realize the Coyote motor responded so differently than any other motor I've had, even the 4.6l DOHC.
I'll give Blowfish a try, and thought that since I needed a driveline hoop anyway we will see how much of difference it will make along with the Whiteline transmission mount.
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Old 01-26-2015, 01:54 AM   #15
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I have a 14 gt with roush CAI. BBK 85mm throttle body Roush axel backs and resonator delete. No tune done. And I have no dash lights on. So I guess buy the good stuff no issues.


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Old 01-26-2015, 01:44 PM   #16
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I have a 14 gt with roush CAI. BBK 85mm throttle body Roush axel backs and resonator delete. No tune done. And I have no dash lights on. So I guess buy the good stuff no issues.


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Not quite. All of that stuff is "no tune required" which means you get some gains but not the most. The items that are "tune required" will actually net slightly larger gains because they go bigger per say. In the cause of a cai the maf housing will usually be larger. So the "good stuff" would in fact be the items that DO require a tune.

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Old 01-27-2015, 10:26 AM   #17
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man im so back and forth about getting a CAI and tuner combo from american muscle. should i just get the tuner and maybe a couple of cosmetic pieces?
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Old 01-27-2015, 11:06 AM   #18
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man im so back and forth about getting a CAI and tuner combo from american muscle. should i just get the tuner and maybe a couple of cosmetic pieces?
Skip the CAI and get a good quality tune.
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Old 01-27-2015, 11:08 AM   #19
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Skip the CAI and get a good quality tune.
thanks again! lol
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Old 01-27-2015, 11:59 AM   #20
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Skip the CAI and skip Bama and get a good quality tune.
Agreed
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Old 01-27-2015, 04:40 PM   #21
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I would get the tuner and an off road x pipe, both pieces gain hp unlike the CAI, plus improved sound.
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Old 01-27-2015, 08:02 PM   #22
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I went the tuner and x pipe route and could not be happier.
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Old 01-30-2015, 08:42 AM   #23
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What kind of x pipe did you go with ?


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Old 01-30-2015, 01:34 PM   #24
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Whoever mentioned the Blowfish bracket, those are now obsolete due to the MGW race spec.
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Old 01-30-2015, 10:08 PM   #25
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Old 01-31-2015, 10:43 AM   #26
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Whoever mentioned the Blowfish bracket, those are now obsolete due to the MGW race spec.
I'm not going for a racing shifter, just to clean up the shifts plus it will serve a hoop with the 1 piece ShaftMasters driveline.
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Old 01-31-2015, 02:21 PM   #27
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I'm not going for a racing shifter, just to clean up the shifts plus it will serve a hoop with the 1 piece ShaftMasters driveline.
Its not a "racing" shifter. Read up on it/look at how it works vs other shifters that keep the stock bottom half. Its the only shifter that replaces the limp noodle stock linkage. You can get a DS loop by itself.
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Old 01-31-2015, 03:06 PM   #28
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Its not a "racing" shifter. Read up on it/look at how it works vs other shifters that keep the stock bottom half. Its the only shifter that replaces the limp noodle stock linkage. You can get a DS loop by itself.
Although I appreciate your opinion I have read about it, and for me the Whiteline trans mount and the revised "street version" of the Blowfish will do fine for me.
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Old 01-31-2015, 10:33 PM   #29
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Whatever floats your boat. Just know that no matter what you do you'll always have the limp noodle stock linkage which the MGW Race Spec completely replaces with a custom machined piece.
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