I've only had mine for 6 weeks and 2000 miles. Mine has the 3.55 rear end. 1st gear in the 10 speed is lower than the 1st gear in the 6 speed trans. I am not towing over 10k so I did not feel the need to go with 4:30 rear end. I had the 4:30 in a 4 speed V10 truck. This truck moves my trailer way easier at all speeds with less rpms.

Fight fire, save lives, laugh in the face of danger.

Stupid always finds a way.