Ok, so last night I was driving my 91 accord, and out of no where 2nd gear starts scratching. "well oh fuck, synchronizer are going out.time to use that spare tranny." But this morning when I go to drive down to the store, no scratch. Im kinda puzzled about this. Maybe the synchronizer lined back up and is doing fine again? Idk. Im not seriously worried about being a I have a spare laying around and sooner or later I have to pull the tranny to replace a spun rod bearinged crank. but still... curiousity ask, what could cause this mystery of a scratch?