Gearbox breather

[lokqust]

Quick question,

I've recently done a full gearbox oil change and wanted to stick in some treatment because the synchros are getting crunchy, could I add this through the breather hole on top of the box? Is the Forte treatment recommended?

ta

 

[MartinR]

Will take a long time to get it through the breather. But tbh those treatments won't do anything, refurb is the only option

 

[Coops Mk1]

ai, it wont do anything really as usually a crunchy synchro is due to the teeth being knocked off it