Rough idle after warm up turning on AC stops rough idle

[Karsten]

I have 2004 Dodge Ram 2500 5.9. The truck has rough idle after warm up if AC is not on. Also the truck pops into gear really hard, does not do this until truck is warmed up.

 

[cerberusiam]

Need some more info on transmission and miles, service, etc.

On the rough idle check the AC clutch activation wire all the way into the main harness, they will scuff themselves on metal lines and clamps causing no end of weird idle problems.

 

[Karsten]

The truck has 180k. I just purchased but have done new oil, fuel filter and rear diff fluid. The truck is 2 wheel drive and the previous owner had posi track installed. Not sure on the model of transmission, will get back to you on that.