3.55 gears and driveshaft - Mustang Evolution

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Old 12-08-2015, 02:49 PM   #1
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3.55 gears and driveshaft

Just got a set of 3.55 gears for my 2012 auto question is i plan on keeping the stock driveshaft and keeping the limiter on i have mpt tunes .Don't plan on racing it so will stock driveshaft be ok with the 3.55 gears ? Thanks for any input
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Old 12-08-2015, 04:26 PM   #2
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Yes, you will be fine with the stock driveshaft as long as you don't take off the speed limiter. Anything over 115mph and you're asking for trouble.
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Old 12-08-2015, 05:45 PM   #3
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What's a good drive shaft for an auto with 3.73 gears?


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Old 12-08-2015, 05:52 PM   #4
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I just got the axle exchange one from AM for $710. I got mine when it was on their monthly sale. Plus AM code. Ended up being like $640.

My auto has 3.73s and the driveshaft held up fine at the drag strip.


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Old 12-08-2015, 08:50 PM   #5
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Originally Posted by jek57 View Post
Just got a set of 3.55 gears for my 2012 auto question is i plan on keeping the stock driveshaft and keeping the limiter on i have mpt tunes .Don't plan on racing it so will stock driveshaft be ok with the 3.55 gears ? Thanks for any input
Of course the consideration is that the drive shaft turns faster with higher ratio gears and the speedometer has been corrected to represent the speed of the wheels and not the higher speed of the drive shaft. So when and if you were to hit 115 mph your drive shaft would be turning at a speed representing something higher than 115 mph.
I would look into it further if I were you.
Actually, if it was me and I was going from 2.73 to 3.55, I would get the better drive shaft, as many have.
EDIT:When it comes to safety, do your own research and make sure you understand what the potential problems may be.
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Old 12-08-2015, 09:51 PM   #6
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Originally Posted by iamcesarmiranda View Post
What's a good drive shaft for an auto with 3.73 gears?


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Any aluminum one piece world be superior to stock.
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Old 12-09-2015, 03:15 AM   #7
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No it's our daily driver road trip car in the summer plus my wife drives it alot also so it wont be going to the track nor 115 mph ,
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Old 12-09-2015, 05:22 AM   #8
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Then there is no need to spend 700 on a ds.

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Old 12-09-2015, 08:13 PM   #9
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What's the deal with the 3.7 driveshaft? I take it that it's a different ds than the GT's? What about a GT ds? Would that work?
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Old 12-09-2015, 08:38 PM   #10
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What's the deal with the 3.7 driveshaft? I take it that it's a different ds than the GT's? What about a GT ds? Would that work?
Here's your answer.
GT Drive shaft on v6
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Old 12-10-2015, 10:04 AM   #11
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Thanks diehard. I know I could've searched but it didn't really matter to me other than I have my oem ds I'd let go for cheap if someone wanted it.
Fwiw, I have a shaft masters alum ds on my GT. Been working great for 2 seasons.
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Old 12-10-2015, 10:10 AM   #12
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Originally Posted by jek57 View Post
Just got a set of 3.55 gears for my 2012 auto question is i plan on keeping the stock driveshaft and keeping the limiter on i have mpt tunes .Don't plan on racing it so will stock driveshaft be ok with the 3.55 gears ? Thanks for any input
You will be fine. I had the 3.55's put in the beginning of spring and went all summer with the stock driveshaft at the strip. I now switched to the aluminum one piece since there is a half mile strip I nearby that I would like to see how fast these 3.7's can really go.
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Old 12-10-2015, 10:27 AM   #13
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I have 3.73 gears and stock drive shaft with no limiter and I do high speed driving everyday. Ive been to 140mph on the stock drive shaft while racing my friend and I didnt realize how fast I was going. Scared the crap out of me, knowing that the thing blows up. I would say dont go over the speed limiter and youll be good. the farthest I go is around 120.
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Old 12-10-2015, 04:01 PM   #14
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Thanks for the input ..wont be going to the track nor do i beat on it but these 2.73 don't do these 3.7s any justice my 09 4.0 had better bottom end then the 3.7 with 2.73s
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Old 12-10-2015, 09:13 PM   #15
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I have a '14 PP w/ 3:31's, no engine mods. The stock driveshaft would start vibrating noticeably right at 100, and got worse all the way up to the limiter. I opted to get an Axle Exchange aluminum DS, and have been very pleased with it. I like to do long road trips to the west coast on occasion, and the ability to cruise at *ahem* elevated speeds for long periods of time - with no vibration and no worries - made it worth every penny. Just my experience, so as they say, "Your mileage may vary".
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