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Basically, just what the title says. The 2000 AW4 in Junior is misbehaving...throwing the P705 code which translates into the OD solenoid is not 'electrically' checking out upon start. I have replaced the solenoid and it worked for awhile but now has started to throw the code again. The problem is the OD works occasionally and has no pattern to its misbehavior. Over the weekend the truck was driven to Hattiesburg and back - OD worked on the way up and did not on the way back (which would seem to indicate fluid circulation and/or warm up is not the case). When the solenoid was replaced the filter and fluid was changed out - no particular debris or dirt was observed (filter and fluid had been changed when the trans was installed at conversion). Because the solenoid is mechanical (activated by an electrical signal) can the TCM be the culprit here? When the truck is started, does the TCM physically actuate the solenoid or just check to see if it worked the last time the truck was running? Thanks Jake