Rolls forward in neutral, locks up rolling backwards??

And now the update you've all been waiting for!

I followed the advice given by several of you and simply removed the crossmember to drop the tail down. It was much easier than I thought it would be. I made a cradle out of 2x4s and used a floor jack to slowly lower it while sliding it back. I think that was the sketchy part. When I put it back in, I'm either going to do a better job supporting it, or "rent" a transmission jack from HF. I should've followed pt70's advice and used more wood and 2x10s instead. As usual, the damn headers were in the way. Oh, I also disconnected the exhaust hangers to get the x-pipe out of the way.
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Now time to remove the pump and get to the front drum. Let me tell you guys, I am extremely lucky I didn't damage the threads in the pump. The parts store only had a regular slide hammer, so I had to improvise with a bolt I had. I forgot that the threads for pulling the pump are LARGER than the fastener threads. I banged on that damn thing pretty good with a bolt in the fastener hole, not the larger hole. I caught myself in time, switched to a larger bolt at 3/8 x 16, and it came right out. Surprisingly, the clutch plate teeth look just fine, and from what I could see of the friction material, they don't look burned up. Here's a view of the inside of the drum.
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I was also expecting to have to replace the band, but it looks good. I suspect this transmission was recently rebuilt. What are your thoughts?
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Now look at the first photo of the band. See that washer?? DOH!!! I now understand why folks recommend installing the pump with the transmission vertical. So, what I think happened was a series of errors made by me. I didn't tighten the band down before removing the pump, causing things to drop down after it was removed (including that washer). With the pump out, I turned the input shaft just because I'm a curious monkey and wanted to see it spin. I think that misaligned the tangs of the drum. Then when I re-installed the pump, I just jammed it in there and ran down the bolts. The misaligned tangs never realigned, and the washer got smashed just where it sat.

I decided not to replace the clutch plates and steels, because to me (pops agreed) they look fine. I didn't want to go digging around and increase my chances of making another mistake if I didn't have to. I'm waiting for the transmission shop to open so I can go get another washer and receive my deserved flogging from Keith, the owner. Then I'll have pops come over and help with the assembly....this time in the VERTICAL position!