Ian,
I didnot have any overheating issues with my 05 dually, same with Larry. Maybe neither of us is a lead foot? or trying to pull at unreasonable speeds etc.
If you want to talk about overheaters, try the 6.5td from 95-97 with the auto trans. I had some issues with my NV4500, but not near the temps issues as those with the auto trans. I solved most of that issue with the post 97 cooling mods.
Of course this is not to say some or all of these did not have issues.....with the HP/torque a lot of the new motors are producing, an excellent cooling system is a must.
Marty
