One problem related to automatic transmission torque converter has been reported for the 2002 Mitsubishi Diamante. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Mitsubishi Diamante based on all problems reported for the 2002 Diamante.
I have had the transmission replaced including the torque converter $5000. I am going on my second power antenna $300. The most recent called for a heater core replacement $1050.