Originally Posted by Eltonnoland
I've been looking at new and used Chevy 2500's and want a 6.0 gas. As I understand it, a 4.10 is the only rear end offered on a 6.0. Using the codes in the glove box I've noticed a lot of 2013's and older have 3.73. Did Chevy change what they offered? How much is a 4.10 going to affect mileage when not towing? I'm presently towing with a 5.3L and 3.42 gears and have no problem with a 6800lb dry load TT. Just trying to remove the suck and blow.
I had a 2006 2500 with 6.0 and 4.10 gears. In that year, I'm pretty sure a 3.73 was also offered, but it also only had 4 speed tranny. With the newer 6 speed transmissions, you should do better with highway mileage unloaded and have better pulling power when towing. I believe the 6 speeds and the improvements made to the 6.0 made the 3.73 somewhat obsolete, that's why it was dropped.