Ford Mustang Forum - View Single Post - Are 355's my best option
View Single Post
post #21 of (permalink) Old 01-03-2012
GT Member
Classic Member
4.6L Member
johnr2001's Avatar
Joined: Jul 2007
Location: in the sticks
Posts: 1,956
Originally Posted by 5.0ben View Post
I went from 3.31's to 3.73's in my manual and wouldn't do it again. I got a humming sound and burning smell in the rear after the install. I was also ripped off by the dealer for the install $1000 P&L.
The worst part about 3.31's IMO is 6th gear on the highway.
That alone is worth the upgrade in gears maybe to 3.55's.
I noticed top end loss with the 3.73's which was very disappointing. The overall performance difference was noticeable but nothing major. 1st gear definitely pulled harder and it felt a little snappier in all of the gears in the low rpm's with a top end trade off. The extra shifting was annoying too on my daily traffic filled commute.
I could however see the 3.73's being good with a race tune allowing you to rev higher and having more top end power.

I think 3.55's are the optimal overall gear for this car for the manual.

In the end I got an auto which pulls harder after first gear than the manual with any of the gear choices and couldn't be happier:smilie
sounds to me like you just had a complete bad experience with 3:73's starting with the install. should be no noise or smell when installed correct... and yes a 1000.oo they got ya...

as far as top end loss very little if any at all just turning a few more rpms at the top...

in my opinion 3:55's would be a waste of money ...I would not even of bought mine without the 3;73'S that was a must for me..

best of luck with your choice...

03 Mach 1, Full eaton swap,4;10s, slp 2 with mac H pipe, 443 rwhp tuned by Excessive

1990 lx fully built 331 stroker

89 LX lots of goodies
johnr2001 is offline  
For the best viewing experience please update your browser to Google Chrome