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I never knew that these things were even rebuildable. Yes, I really do seem to live under a rock. When I had to fabricate the entire linkage, add the pedal and create the body lift drop linkage to get the SM465 to work in a purely automatic frame I was just happy it all worked and never thought to ask about a rebuild kit at Napa. The bellcrank I got from the salvage yard was in poor shape and is the same today I guess. It works smooth but doesn't give the feel I would like. But I think that is just matter of adding at least one stronger spring either on the linkage or at the fork.
Good thread.I have had a zillion 4sp trucks apart and don't remember the spring. It does make sense. There has to be something to load the bushings, and allow for engine torque.
All the ones I have ever pulled apart (of course they were OLD) never had springs in them.