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Old 10-25-2009, 10:36 PM   #1
dstang10
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Default What gears do you have???

Well I checked on mine and I have 3.31's. I was wondering how the 3.73's feel.
What RPM are you at when your on the highway 5th gear doing 70mph? Should I upgrade?
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Old 10-25-2009, 10:57 PM   #2
-DK-
 
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Default Gears.

I have done much research on this topic and have found that the 3.73 gears are not nearly as big as a bang for your buck as the 4.10 gears are. Everyone says that it feels like that car has just had 1,000 lbs. lifted off the car. I hear you loose a little bit of your top end (how often are you going 100 plus? take into consideration) and you loose just a little bit of your fuel economy on the highway but not that much. All and all i hear its one of the best mods you can do to your stang. Good luck and let me know whichever works out for you.
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Old 10-25-2009, 11:17 PM   #3
10GTPony
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Default

Quote:
Originally Posted by dstang10 View Post
What RPM are you at when your on the highway 5th gear doing 70mph?
I can't take credit for this superb spreadsheet, but it calculates the different RPMs given your tire size & gear ratio.

Just enter your tire specs, transmission, and gear ratio (it lets you choose a few to compare) and you'll have a ton of info.

I forget where I picked it up -- probably on this board somewhere.

The forum won't allow uploading of an Excel (.xls) file, so I had to zip it.

P.S. - Someone chime in if they know whom to credit for this exceptional spreadsheet.

P.P.S. I finally found where I picked up this spread sheet. See:

http://mustangforums.com/forum/6419184-post26.html

and thanks to poster bynumj for it!
Attached Files
File Type: zip Gear_Chart.zip (12.3 KB, 21 views)
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Last edited by 10GTPony; 11-12-2009 at 12:56 AM. Reason: Giving due credit for spreadsheet noted in post - thanks bynumj!
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Old 10-25-2009, 11:23 PM   #4
dstang10
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Wow that chart is the bomb!! Thanks, right now i'm debating the 3.73 and 4.10's
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Old 10-25-2009, 11:29 PM   #5
10GTPony
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Quote:
Originally Posted by dstang10 View Post
Wow that chart is the bomb!! Thanks, right now i'm debating the 3.73 and 4.10's
Very welcome my friend. I found it very informative too...
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Old 10-26-2009, 05:47 AM   #6
GTJT2010
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Default

i have 3.73, i like, at 70, its right at 2100 to 2200 , my dyno wa 130 mph, at 4500 in 4th, my redline was set to 7,000 373 are good if you are just going to drive normal, trips, work, , i'm keeping them
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