dstang10

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?

-DK-

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.

7up

I can't take credit for this superb spreadsheet, but it calculates the different RPMs given your tire size & gear ratio, and transmission.

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


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

Edit to add: And thanks to poster bynumj for it. At least that's where I first found it.

dstang10

Wow that chart is the bomb!! Thanks, right now i'm debating the 3.73 and 4.10's

7up

Very welcome my friend. I found it very informative too...

6+6 Stang

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