Almost all of the old automatics had a rear output pump when they first came out. Main reason was for push-offs. Folks did not trust the "slush boxes", and one of the reasons was the thought that they would be stranded if the starter went out or the battery died.
The 35 mph rule was a general one depending on tire size and gear ratio, but it was in most of the owner's manuals.
Which led to a lot of urban legends. I'm sure that it did not happen as often as was rumored, but I know it happened at least once in my city when I was young.
There were variations, but it basically concerned a guy whose car needed a push, and usually an older or elderly helpful driver. The older driver agreed to give a push, and listened carefully when told that they had to get up to 35 before it would work.
The stranded guy would get in his car, wait for a moment, and then look into his rearview mirror to see the other car coming at him at 35.
As for your truck, unless the driveway slopes the right way, the only thing I can suggest, is to slip off the belt, wrap a rope around the main pulley, and PULL.
Hey, I know it won't work, and might even hurt you, but I've got a 225 horse Mercury outboard that has a pull rope under the cover. I gotta figure the chances are about the same.......
J.
