Sorry, I have been away from this site for a while. My apologies. Did you ever get a pressure reading from the trans? I find it helpful to know if you have a good baseline.

There aren't really any surprises pulling the VBs off. Clean both VBs like in the video. If you do not have a replacement gasket, be gingerly taking the assemblies out. Sometimes the old gasket will get fused.

Rebuilding one of these transmissions is not that difficult if it comes down to it. Eventually, I'll make a video of that.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge