904 Trans suddenly stopped working

I think Mike has a good point there. I've seen this happen many times & definitely not a nice thing to happen. Maybe a bit late, but for future reference, here are 3 photos of a correctly fitted 904 converter before the transmission was installed. The distance between the starter ring gear & the bell housing flange is 34 millimetres.

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Hope it helps.

Based on the pictures it seems like my converter was close to being in all the way, I was probably only off by a few millimeters. It spun free after it slid in to the 2nd position. Maybe I just didn't push it in far enough even and it was only slightly in place.