Is this the 6 speed or the newer 9 speed transmission? The 6 speed I have in my Grand Caravan is perfect for something that very rarely exceeds 5000lb GVW and has a max of ~8000lb GCWR. These huge (& heavy) vans they put the minivan powertrain into is a recipe for disaster. The engine can handle it though with a very high torque peak, it'll be wound up pretty much all the time. The transmission can't, 24K sounds about right.