Riddle me this........ truck heat.

[Goldeneagle]

Trans fluid is run through the radiator for cooling..seperate from engine cooling..

If the engine is not getting hot enough , thermostat is most likely bad..has the truck heat ever worked?

It worked last winter. I've changed thermostat 3 times in the last month. Coolant temp is up there. Has to be the blend door.

[Matt_C]

I think I actually have 2 problems. A small leak up high on the radiator and the fan clutch. I'm going to put a clutch on it after work and then start looking for the leak.

Most parts stores have a coolant pressure test system they will loan you so you can pressure test it to find leak.

[cashcropper]

Transmission cooler leak maybe?