4 spd. pops out of gear.

The work I do on 2nd gear to fix the issue you are having is done in a Bridgeport with a carbide endmill.....not a file.
I asked a lady to speak to a tech, I wrote down Don, if you don`t have a Don there, then I`m mistaken and spoke to you Dan. I just typed what I recalled of the conversation.
If you would, pm me the est. cost to make that gear right and turn around time.
Thanks.

I want this trans right or go another route.