Wasn't sure that this was a hard mechanical problem since I have dropped the tranny pan when this started and there is no metal and just the usual clutch dust. Upshifts are fine and this only occurs when I am in OD and give it moderate throttle and downshift to 3rd gear. I was told to clean the MAF and see if that clears up the problem. Does anyone else have any ideas like a solenoid or something else? thanks.