I use the new Mopar ATF +4, you can get it at your dealer. 5 gallon jug is about 18-20 bucks.Built shortblock 8.8:1 CP pistons, Eagle RodsBuilt head w/ P&P by ERTGST Mufflerinjen short ram intakemagnecore 8.5mm wiresEGR removal/blockofffront/rear strut tower barsGSX dual piston calipersHigh stall torque converter, Trans cooler, remote filter