Well, I read that and understand why there is some confusion about when PWM started. The originals had on/off control; of the TCC, and they stamped "PWM" on the case when TCC control was changed to PWM. I think I read this in the ATSG manual, too, but ignored it because we are focused on the shifting. I still feel the important controls for shifting, the PCS and two solenoids, have always been PWM; regardless of how the trans case is marked. I am certainly no expert here, may be wrong. Read everything you can find on the PWM subject, hope to find a general agreement in most info.
That Valvoline ATF is a DEX6 formulation, not suitable for my "Hail Mary" try of DEX3.
I may be absent/slow here for a while. My wife and I are both sick with flu.