Qty (2)2012 Mack GU713 triaxle water tank trucks MP8-505hp w/engine brake Mack T318 18 speed transmission 20,000lb front axle 44,000lb rear axle on Mack camel back w/bronze trunnion bushings 268" wheel base 179"Cab to axle 52" after frame Heavy single frame 188887 miles and 248000 miles