Sounds more like a gearing or tuning problem than the engine, the torque curve of the Cummins is better suited to towing than a gas powered bent 8.

Last edited by jalopy45 #4899; 10/12/13 11:31 AM. Reason: beaters fault
'45 Ford PU
66 Valiant wagon, leaning tower of power.
79 Chevy C10 w/250
02 PT Cruiser Convertable