Just starting to reassemble a 3 synchro B type box and a section of the cone surface dropped off 2nd gear.
Is this a hardened surface that has just disintegrated?
To me the gear is u/s. Am I right?
The other problem I'm having is trying to depress both plungers to allow the locking ring to drop and locate on the semi circular thrusts. There are no helpful holes in the cone to poke the plungers down.
Better check the other gear cones now.