TF727 727 Max Lug Pump Gear Set. The Best Insurance money can buy! TCS Products offers a new precision machined “MAX-LUG” pump gear set for the Chrysler TF727 transmission. With 45% more drive lug surface this gear set has the largest and strongest pump drive lugs in the industry. This redesigned 100% drop-in gear set greatly reduces the possibility of pump failure. Made for EXTREME service and high performance applications.