Bionic Man wrote:
Shiner, can you link to a document that states expected or acceptable operating temps for the 68 (or any modern transmission)? I’m sincerely interested.
Turbo Diesel Register issue 90, pages 86-87 covers temps of the 68RFE.
There is also this article form ETE....
68RFE Transmission Equipped Dodge TrucksMy main concern is not really what sump temps are, which is what the gauge reads, but rather other areas that get much hotter. I wish Ram would have put the sensor somewhere between the transmission and cooler since that would be a better place to read the highest temp. If the sump is reading 200F, then there is no doubt that this line is much hotter.
I can see how someone up north may not be that concerned since outside temps do not get that hot as it does here and most places that do get that hot have a rather low humidity(like the desert) which isn't so bad. However, with south Texas high temps and high humidity making 100F(which is normal here) feel much hotter, things start to snowball down hill once truck temps start to get hot because the cooler/radiators can only reduce the heat so many degrees from what the outside temperature is.
One way to combat this is to not let them get that hot in the first place which is what this valve is suppose to do. The stock valve purposely closes the loop to the cooler to purposely get the temps hotter quickly which is mainly for minimal fuel gains and/or to get keep the fluid hot in very cold climates from what TransEngineer has stated before. These trucks are generically made for many different conditions/situations and most people who live in areas where it hardly ever gets to 90F and if it does then it is a low 15% humidity will probably never need such a mod so this thread kind of does not apply to them.
