OK, thanks Greg. I looked at the FAQ section and thought that it might be outdated. The FAQ section does not mention the Forward shift gear driven cases, but you've cleared it up for me. I also see in the FAQ section that it wouldn't be to hard to do the conversion to top shift.

Does anyone perhaps know if these newer cases ('90 and up) has the same dimensions as the older 1980 cases. I read on Marlin's site in the T-case bible that some cases are referred to as tall. Is the overall case taller, or is it just the bottom half (from the in and output flanges to the drain plug)?

I have a fairly bad vibration coming from one or both of my dual cases. Does anyone want to speculate what the likely cause of that might be? Would it be the Marlin adapter that is going or the T-case bearings?

Thanks for the help