It doesn't look like that controller has soft start, is the only thing. And frequently, these controllers need a mechanical switch flipped to change direction, which would add another complication. I just want to use the original shuttle lever. I could create a small circuit with a couple relays that would eliminate the need for a second module on my setup, but they are so cheap I didn't bother to worry about it. Plus, it would be more complicated for others who don't understand electrical that well to duplicate on their own. If there was more demand I might make something to sell, but I don't expect that it would be worthwhile.
I could just create my own dual soft start circuit and that would probably be sufficient also, I don't think the PWM is actually necessary in this application. A slow voltage rise over several seconds would probably work just fine. But having the PWM module on hand already sort of pushed me in that direction. Simple, quick and inexpensive. The other nice thing about the controllers I am using is that they have a built in setting for overload, just like the original TCM. I can set that for say 1.5 amps, and if the load (solenoid) draws more than that, the module will cut off power, just like the original TCM.
Edit: if you need any help Fred, feel free to send me a message. The TCM really isn't that complicated. All it is doing is taking a voltage signal in from the shuttle lever and phasing an output voltage in to the forward or reverse solenoids. Your machine's TCM is a little more complicated than mine in that yours has an additional torque converter lockup solenoid. My machine (555D) does not lock up the converter. You could install a separate switch for that pretty readily if you wanted to keep it. You might get along just fine without it though.
