Try Randy's ring and pinion.

 

I got a good deal on ebay on my Eaton - been great so far.

 

Love my Eaton!

 

I like my eaton too

randy's ring and pinion gets another vote
I bought my dad a 12 bolt and some other things
from them with good results

I bought my 10 bolt from a member here

 

eaton all the way. A buddy of mine blew out an auburn with only 1500 miles on it, and two trips to the track. Auburn wouldn't replace the unit under warranty, they just said they would replace the clutches for 135.

 

The auburn didn't like leaving at 4000 rpm on slicks......the eaton hasn't even flinched!!!.....GO EATON!!!

 

Hmm, looks like I made the right choice....

 

sorry dont want to start a fight but auburn is going to replace one my friend broke and gave to me with a brand new one and even upgrade to the pro line from the sportsmen line for only 125$ shipping and everything so i dont know how you say that they charge just the same for another one just my .02 and also i know stupidfast who has been running consistenly over 500whp for ever it seems now about 2 years or so it seems maybe even more and does nothing but beat the crap outta that thing at the track and his just now went out again JMOa

 

The first posi I bought for my truck was the Auburn "pro" series. I blew it up in no time....and that was b4 the supercharger. The Eaton has proven to be a far superior unit.