just want to share my experience..
i also got prob wth 2003 V6..
the problem started wth jerking when gear changing frm 1st to 2nd gear..
also changing automatically frm 4th to 3rd when i driving 80-100kmh...
ive change gbox twice bfore it working better..
gbox with installation cost me rm2.6k(include atf cooler)..
pening lohhhhhh... now change car edi.. im using v6 only for 9months..
broken heart d..........