3715 or 3815

[korby05]

I have a 2002 ram with the 5.9 in it. I was wondering which controller to get and which one is best for my truck. I've heard good things about the 3815 but nothing for the 3715. What are the big differences between the two. Any and all info is welcome. Thanks in advance

 

[wermbang]

I am running a 3715, and really enjoy it for my 5.9. On the performance tune I gained 2.5 mpgs. I am currently running the tow tune and will wait and see what kind of mileage I get. My truck is now mainly used for towing my camper, so my starting point without the tuner for mpgs while towing is 6. hopefully I can do better, but I love the shifting with the tow tune on.

 

[AParrette]

i ran the 3865 with no problems.
i actually enjoyed the economy tune more in the 5.9
it leaves it in first and second longer but it's all the power i could ever want