Just tore the t56 completely down, looks like it needs a bunch of gears replaced. I'm going to be replacing all synchro rings and have billet keys for them.
Which gears should I replace?

 

2nd gear in the 2nd picture needs to be replaced.

3rd gear in picture in 1st picture could be reused if deburred and cleaned up
6th gear in picture in 5th picture could be reused if deburred and cleaned up
Input shaft in picture in last picture could be reused if deburred and cleaned up

All other gears are fine. Debur as needed and clean them up.

 

Thank you for the advice. Im going to order and replace 2nd, 3rd, 6th and the input shaft just to be safe.
I will also deburr and clean up the rest before reassembly.