Re: suttering hemi
When on the highway at a constant speed, the transmission should be in fifth gear and the torque converter clutch activated. If the shuttering occurs, do you see the engine rpm changing a bit?
I wonder if this doesn´t have to do with the engine itself. The hemi doesn´t have a TPS on the throttle body anymore, so does it have an accelerator pedal transducer? Would be interresting to see if the output from this transducer is steady, or if it does fluctuate a bit at the moment the shuttering occurs. Do you have a scanner to monitor this? (or maybe it shows on an android phone with torque app and bluetooth dongle).