I just changed my tranny oil to Amsoil 5-30 per a thread I saw some time back. I have to agree with the original poster that the tranny shifts better than it did before the change. I don't have the noise from low to 2nd now, and the overall sync seems improved. Seems hard to belive from just changing oil.
Also, I only got about a quart and a half out of the thing, but put back a little over two quarts. Strange.....