[Goat-Racer]

Originally Posted by Pontirag

posi/limited slips can be noisy around turns on dry serfaces, some clunking/racheting is experienced, also tire squeal can be a problem.

If you have noise when cornering with an clutch type posi, you aren't using the right friction modifier in the gear lube. Personally, I've never had this issue and I have had an Eaton posi in use for about a dozen years now (signature car). One trick is that a guy can throw away the preload springs inside the diff. There are shims available to "tune" the clutch pack and tighten things up without the need for the springs. They are there to help if you have one tire off in the mud or snow, but at the track with equal traction at both wheels, they just don't do anything.

Call Tom's differentials for some advice on an Eaton assembly or the componants to put one together. http://www.tomsdifferentials.com/catalog.asp?pg=3
Go for some heat treated 10/17s and see if he can machine the posi case to accept the larger diameter 33 spline axles.
As was mantioned earlier, It's well worth the cost to do it right the first time!