Transmission advice - saga continues

[delco1946]

Hi all not much has happened over the years wrt my fordomatic. I have yet to find a mechanic familiar with the tranny who is also willing the read the manual. If you recall it was rebuilt around 2019 and has never worked right since.it slips. Every mechanic I have taken it to simply performs the band adjustment is not interested in reading the manual or working through the troubleshooting process, and after a couple hundred miles, my intermediate gear is slipping again. This happens again and again.

I have recently gone through chapter 3 Troubleshooting of the transmission manual steps A through E myself and I’m now on F pressure regulation. So far, nothing has made a difference and frankly adjusting the throttle control rod according to the manual actually is making it slip even more now in low and intermediate.

After reading section F and the corrective fixes ( bending metal tabs/internal throttle stops, I’m not sure if I’m going to have any change if I’m able to complete section F on my own. I would think adjusting the Throttle control rod would have caused the change if anything was going to do it. It also warns against exceeding 3.5 turns on the TCR Clevis. I’m nervous to be under the car with it running to test pressures and physically mess around with transmission. In my mind something else must going on.

This has me wondering, how does one determine if the clutches are at fault?. In my research, I came across a couple mentions of rebuild kit not coming with the right washers and seals. If I needed square cut rings and the kit came with round O-rings could that cause prevent fluid pressure buildup? could there be some other culprit? Could there be something wrong with the torque converter, which I think spins the front pump providing pressure?