Just brought home a 5000 lb camper. Burb is under powered! The factory 2500 stall converter keeps engine at around 3000 rpm driving Just doesn't seem to have the power. Traded my 1/2 ton burb with the 5.3l for this. I know my 1/2 ton would smoke this 3/4 ton. Bought burb with 33" tires. Causes gear ratio to increase from 3.73 to 3.42. Not helping things either. Anyone with a similar problem?