Dodge Ram shudders, sometimes violently, after engine warms up. First 7 to 10 miles truck runs like it's brand new....but after engine warms up, it's not fun to drive. I've had complete tune-up and injectors cleaned. Had a transmission shop to evaluate...and thankfully, it's not the tranny. Any ideas?

 

Disconnect the front oxygen sensor, take a spin. If the problem doesn't occur, replace that sensor. (Don't go driving around thinking that disconnecting it is a valid fix.)

 

I'll try that with the oxygen sensor. Someone had suggested coil and another said possibility of worn timing chain. I just bought the truck couple of months ago and it was doing it when I got it.

 

+1 on the o2 sensor. its whats reading everything and telling the motor what to do as far as the mixture goes cold vs hot. if the o2 being unplugged fixes it then you may look into having a blown plenum gasket it has not been fixed.