Eaton fuller 10 speed manual split box valve gets stuck.

I'm sure that someone who's an expert will chime in soon enough but my own idea would be the filter regulator or the slave cylinder itself.

 

Probably dry piston seals on the piston, depending on year and model.

 

Change the handle 70$

 

So You are missing the shifts then when going from lo-high or high -lo? Or is this just you fiddling with it in neutral and not moving when you arent supposed to do do that?

 

What model transmission? Probably need range cylinder kit and clean real good. Plus make sure contaminants are not getting into your air system.

 

Before I bought a kit i’d try just changing the air filter. You only have to drop a couple psi inlet pressure at the shift solenoid before it won’t shift right. New filter may cure it.