Very interesting information about the transaxle and Fly Ash (had to look that up). I think I've heard it called "Black Diamond" which I think is derived from the same coal slag. Preparation of syncro parts is definitely an area to look at in getting better shifts.
Is using blasting media to increase friction on the mechanical movements inside the synchro ring supposed to promote a better application of outward pressure on the band? Could it eventually cause binding on parts used to expand the ring?
Here are anchor/stop blocks (red arrow) scored from friction. Same with both of the curved springs (green arrow) but to a lesser extent.
Seems engineers thought there is a need to reduce friction inside the syncro ring given the grooves inside; presumably to hold oil & reduce friction while spinning and allow a path for oil to exit during apply.
Don't know for sure what is best; I'm still learning.
I'm thinking as the thrust block pushes on one of the brake bands during a shift and then into the anchor block everything is sliding inside the Ring expanding it. The activity taking place inside the Ring/Band during a shift seems more like a process of mechanical leverage with a some sliding to accommodate growth of the band.
Wouldn't more slipping be needed inside the band rather than friction?
Doesn't the anchor block and the brake band need to slide on the inside surface of the ring as it expands
I thought the friction aspect of these syncros was designed to occur on the outside of the ring; that's why they have a course surface. The inside working surfaces are all machined or cast smooth from the factory.
What would polishing the surfaces on the inside of the sychro ring and blocks/springs do? Increase gear clashing or help the sychro ring expand faster when the dog-collar tries to grab the ring from the rough side? I don't know for sure; has anyone tried this.