Price shopping for 3.73, Superior 31-spline and Cobra diff

Stanger007

Founding Member
Sep 26, 2001
2,015
2
46
Baton Rouge, LA
Hey guys, I need to degear my car a bit so it is not topping out at the track. I'm also taking the opportunity to make the bump to 31spline so that I can run my ET Streets.

Where are the best prices going for FMS 3.73s, Superior 31 spline axles and Cobra differential?

Hmm and to make this a tech thread, has anyone broken a Superior 31 spline axle? Details? Oh yeah and to solidify this in tech, my install cost for labor will be $275 from the best gear installer in the area who said he would do the install and teach me the tricks of the trade since gears are about the only thing I haven't messed with. :D

Thanks StangNet,
Wes
 
my uncle recently installed superior 31 spline axles and they made a difference along with a new trac lok on his 60ft time. it was 1.75 i believe. thats a good deal for installing gears.
 
Thanks for all the suggestions guys.

I've been cutting mid 1.7 60fts before all my latest mods on my Nittos, looking to get well into the 1.6s now with the "real" tires and additional mods.

Wes

Best I ever got with Nitto's was 1.9 but the track prep where I go is not the best. A set of MT DR's solved that.

I found them in a box at my front door. :nice: Thanks

:D Welcome
 
Just so you know you dont need a cobra diff, you can get the clutches alone from the cobra and install those, i believe thats the only difference other than probably the 31 spline thing, lol But thats not a biggy. And i know you can get the clutches from the coba and install those because we have done it already in a fox of a friend of mine