2005-2014 Mustangs Discussions on the latest S197 model Mustangs from Ford.

"Gut Check" on 4.10's

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Old Mar 7, 2009 | 02:37 PM
  #11  
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S197winstang
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Go with 3.73- it is the best all around set-up. if you hate it switch to 4.10, gears are not a all or nothing mod..
Old Mar 7, 2009 | 02:47 PM
  #12  
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Originally Posted by vaporstang
From reading up on MF, if you have an automatic, you don't want to go above 3.73s.

On a manual, going from 3.55s to 3.73s is not worth it - I assume going from 3.31s to 3.73s would be. Someone chime in if I'm wrong....
You are correct.
Old Mar 7, 2009 | 07:03 PM
  #13  
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Dude 4.10s are nasty! The only problem is lack of traction!!!!
Old Mar 7, 2009 | 07:16 PM
  #14  
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Thanks everyone for your responses - it's a great help! I meant to get out to the dealership this morning for estimates, but ended up doing my taxes.

As stated earlier, I believe my dealership knows what they are doing. However, when I ask for the estimate, I'm not mentioning new bearings just to see if they recommend them or automatically include them. If they don't, I'll start looking for a different shop. (I know it ain't much of a test.) I'll also be asking about the no-whine guarantee also.
Old Mar 7, 2009 | 07:19 PM
  #15  
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Originally Posted by VistaGT
Dude 4.10s are nasty! The only problem is lack of traction!!!!
Are you saying I need different tires and/or suspension mods?
Old Mar 7, 2009 | 07:27 PM
  #16  
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I am happy to see the post about the 28" tires....I just had mine installed today and my 4.10's are going in in 2 weeks to make up for the extra tire weight.
Old Mar 7, 2009 | 07:32 PM
  #17  
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IMO (i have them) the only issue with 4.10s is if you do a lot of long highway driving you pull a lot of RPM @ 75, a 28" tire will kill some of the effect
Old Mar 7, 2009 | 07:49 PM
  #18  
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Originally Posted by vaporstang
According to an Excel spredsheet gear calculator I got on MF, the redline speed for 4.10s on a manual w/ 235/50R18 tires is 184mph.

(I can't get the file to attach and I don't remember if he had set up a link....)
It's closer to 199mph and that's at the stock rev limiter of 6250.

http://www.angelfire.com/fl/procrastination/rear.html
Old Mar 7, 2009 | 08:36 PM
  #19  
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Originally Posted by moosestang
It's closer to 199mph and that's at the stock rev limiter of 6250.

http://www.angelfire.com/fl/procrastination/rear.html
You got me off on a rabbit trail! What gear ratio are you using for 5th gear - .62? I've seen the spec before, but can't remember it. My spreadsheet has .68
Old Mar 7, 2009 | 10:04 PM
  #20  
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Default tire size calculator

Originally Posted by moosestang
It's closer to 199mph and that's at the stock rev limiter of 6250.

http://www.angelfire.com/fl/procrastination/rear.html
here is a link to tire size diameter that you can put in different size tires.
http://www.tacomaworld.com/forum/tirecalc.php
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