auto with 4.10? - Ford Mustang Forum
 
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post #1 of 6 (permalink) Old 01-09-2014 Thread Starter
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auto with 4.10?

Hey guys, I have an 2012 3.7 auto with 3.31. Im debating 3.73 vs 4.10. I have the dss aluminum shaft, mpt tune, and other goodies. Who here has an auto 3.7 with 4.10s? Yes ive used the search feature but didnt really find what i want.

How does your ds feel at 120+? Vibrations?

Can you get traction on the street?

Highway rpms? Ive used the calc to predetermine what they would be but id like to hear results.


Thanks for any help!
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post #2 of 6 (permalink) Old 01-10-2014
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High stall converter instead of gears, you'll get a lot bigger boost in performance.

And of you do go gears, don't forget that an automatic requires a tune to keep the transmission operating properly, you'll need the tune with the converter too, either way you go.

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post #3 of 6 (permalink) Old 01-10-2014 Thread Starter
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Thats actually in the plans! circle d 3600-3700 4c is what im looking at for the future. But first I want 3.73 or 4.10 basically for the "butt dyno"
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post #4 of 6 (permalink) Old 01-10-2014
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Quote:
Originally Posted by danilito View Post
Hey guys, I have an 2012 3.7 auto with 3.31. Im debating 3.73 vs 4.10. I have the dss aluminum shaft, mpt tune, and other goodies. Who here has an auto 3.7 with 4.10s? Yes ive used the search feature but didnt really find what i want.

How does your ds feel at 120+? Vibrations?

Can you get traction on the street?

Highway rpms? Ive used the calc to predetermine what they would be but id like to hear results.


Thanks for any help!
The drive shaft is spun balanced to 8000 rpm... your drive shaft will never see 8000 rpm installed on your car... that is equivalent to, running your automatic transmission and being in 4th gear and the tech showing 9100 RPMs. 5th gear and the tech showing 6960 RPMs. 6th gear and the tech showing 5500 RPMs.
Vibration should not be an issue...
Gears 4.10 with stock GT intake, 4.30s with aftermarket Boss intake. should be

I don't speak often but when I do, I don't have clue what I am talking about. I just repeat things that I once heard and do not repeat them correctly... My doctor told me it was an ID 10 T problem and it was incurable.
So when I reply to a post or add to a thread I just find the words elsewhere and copy and paste.
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post #5 of 6 (permalink) Old 01-10-2014 Thread Starter
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150 mph with 4.10 and 27" tire will result in ~7656 driveshaft rpm.

The .89 "safe factor" posted by driveshaft shop was ~7000, which with 4.10s you would hit slightly before 140mph. This is a v6 the shaft is longer and weaker, im looking for actual installed reviews.

not saying i'd go that fast on an open-no-traffic-highway..but
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post #6 of 6 (permalink) Old 01-12-2014
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Quote:
Originally Posted by danilito View Post
Hey guys, I have an 2012 3.7 auto with 3.31. Who here has an auto 3.7 with 4.10s?
Quote:
Originally Posted by JohnRichard View Post
Gears 4.10 with stock GT intake, 4.30s with aftermarket Boss intake. should be
He has a V6. You need to read more carefully.

2015 Mustang GT Premium Automatic 401A

2011 Mustang GT Premium Sold

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2.3 Whipple, fully built motor with all the bolt-ons 718 rwhp/735 rwtq
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