Forum Discussion
Troutguy
Jan 28, 2017Explorer
jmtandem wrote:Again, same exact truck. One is long bed with 3.73 gears and the other is Mega cab with 4.10 gears. 3.73 gets better mpg when driving.
My comment stands as this is a thread about the 6.4 engine and so was/is the TCM magazine article. The specific issue is cylinder deactivation. The diesels (that you have) do not utilize cylinder deactivation under light loads. With the 6.4 and 4.10 axles the cylinder deactivation can occur more often than with the 3.73 axles under a load tending to lessen any gas mileage difference between the two axles.
JMTANDEM is correct. This thread is about RAM 6.4 HEMI gas/3500 dually trucks not diesels or other brands. I would like to see comments from owners or others that have driven these particular trucks. Even though I consider myself a GM guy I am interested in the RAM 6.4 gas dually.
About Travel Trailer Group
44,028 PostsLatest Activity: Apr 08, 2025