The transmission is a CK stage 3 BOP Th-400 rev manual Transbrake with Billet Pro Torque converter 3500 stall. Check out the trans specifics on Cks web sight. The trans has less that 100 miles and has never been raced. The transmission works flawless. Customer is going back to a 2004R. New trans was $2049 and converter was around $1000. Sell for $2500 obo shipped USA only.