There's something I agree with you 100% on Zeeper-
That switch to Amsoil made shifting smoother and reverse easier to engage. Although it still takes a bit of coaxing from time to time.
I was one of, if not the first, to switch mine to Amsoil Severe Gear. And man, did "uncle snotty" curse me up and down. I believe his words were "I hope you blow the transmission out the bottom- might teach you a thing or two" and that I was a "kid".
Glad to hear others are noticing the difference the Amsoil makes.
Zeeper- did you do the rear diff too?