Best gear ratio for towing
I have a 03 2500 cummins srw quad cab with 3.73 gears, and wondering about changing to 4.10. I know it would tow better, but probably get less fuel mileage. Has anyone towed with these ratios. Thanks...
Forum Discussion
Gassers love higher rpms to develope the ponies. Diesels on the otherhand develope the ponies at much lower rpm. My 2012 RAM Cummins with 3.73s, cruises at 60mph right at the 1400 to 1500 rpm sweet spot of max hp/torque. As a result it rarely feels the need to downshift to maintain the cruising speed. Changing to 4.10s would decrease my speed at 1400 rpm by 10% putting me at 54 mph at max hp/torque. Downshifting puts the engine completely out of the sweet spot. I'd rather cruise at max torque and let the tranny handle the very rare occasion that I don't have enough torque to maintain 60mph than have max engine performance at 54mph.
