hey got a tech question about AM Trannys

Originally Posted by jgannon

What pressure are you shifting at? We sheared off that roll pin in one of our Gen 2 shifters last year. Shifting these things at 60PSI is a big no-no. When I asked Andy Baker, I seem to remember him saying that 25PSI is more than sufficient. Though I guess it shouldn't be surprising that applying that much force to one of those pins would wreck it (as anybody who had difficulty assembling Toughboxes this year will tell you), it'd be a nice warning to have in the documentation.

Originally Posted by Uberbots

we downed the psi to 40 after breaking like 10 pins
25 though? that seems a little low. i wonder if the solenoid will even shift at 25 psi... doesnt it take 30 before it does anything?

We didn't use roll pins in our transmissions, in order to avoid the breakage issue. Actually, due to a flaw in dimensioning, we ended up with two different hole sizes. As a result, we used steel nails as our shifting pins. It seemed pretty ganky to us, but it worked really well. Plus, it was pretty cool to tell people that our robot was held together by nails.

Back on topic, we ran our shifting pneumatics at about 35ish, and never had any issues.