Think I found the issue(s)......all kind of plastic broken inside the shifting mechanism.....not even sure how to go about repairing this
aside from the piece completely broken off, there is a deep crack that allows the whole mechanism to "twist" and basically allow the gears to change without the need of the knob being depressed. dont think super glue is gonna hold this, lol
this pic shows the completely missing plastic "bridge" (I do have the piece, could attempt to super glue/gorilla glue)
this pic shows the crack
not sure if this white roller is missing anything? it seemed like there was black plastic covering it, could be wrong
this is the metal poppet I spoke about in OP, it doesn't depress fully when I press the brake in
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