4R100 Hard Shifts and Solenoid Noises
The trans started shifting hard right after I swapped engines.. And later I noticed noises coming from the solenoids.
So I rebuilt the valve body with Sonnax parts and changed the filter and fluid.. fluid was changed twice so far.
As for the solenoids, when I shut the truck off I hear the solenoids tingling I guess you would call it.
The shifts are hard about 80% of the time and the OD light is not flashing on and off and no advanced DTCs are found.
Thanks in advance.