I had this problem. Searched the forum and did not find much about 2-3-2, but found plenty on 1-2-1 and a TSB addressing that issue. Took mine in to the dealer and the replaced the solenoid. FIxed! My trans shifts like it is supposed to now. No more hunting. Truck was under warranty.

 

My built trans has had the solenoid get dirty/stick a few times. It will definitely screw with shifting. When my guru changes fluid he checks/cleans replaces the solenoid just because.

 

What problems were you having with your trans. and what solenoid are you talking about? I'm having issues and don't know too much about these trans.

 

could you explain the issue that you were having a little more in detail? was is having a tough time going from 2nd into 3rd on a hot engine?