2005 TC30 will not stay in forward assist mode

[orville]

My TC30 will shift into forward assist but when I start to move it pops out. If I hold the forward assist back with my foot it starts to click. Please help 2x4 sucks in the mud.

 

[Harry in Ky]

My guess is you have a broken tooth or two on the drive gears for the front axle drive.. Like gear number 18 on this diagram and whatever gear it meshes with. Looks like a pretty good teardown to get to it.

https://www.mycnhstore.com/us/en/newhollandag/na/tractors/compact/naba17com003tc/3-cyl-compact-tractor/transmission/front-transmission-gears-w9-x-3-fwd/cn/23725BBA-B8BF-E111-9FCE-00