Since someone asked, I went with the quaife for a few reasons, but it does not mean I think this new diff is not a smart solution for the cost. The biggest reason I went with the quaife is overall durability. I wanted to get away from the stock differential and I could afford the quaife. I also like the way it works for a street car and fwd being a torsion vs a clutch pack. That is also another discussion for another thread. If you are on a budget, using this type of diff is perfectly fine. Anything is better than the stock open diff. My only concerns that I am waiting to see is how it performs over long term on a high powered car (more than 300).

Does this diff always provide a 50/50 split or does it allow a full range of power transfer to each wheel?

I assume you guys do not get the constant back and forth feel of traction movement like the quaife gives when driving? Hard to explain unless you have ever felt it, but it is feedback in the steering wheel of constant working of the diff. I believe it is a symptom of quaifes only. Not a bad feeling or anything.

Oh, here is a pic of a quaife next to a stock diff to compare to. As you can see, you can not see. It is closed.

05 Mazda RX-8
06 Lotus Elise