You may want to check with your local Dodge dealer; I believe there is a PCM software upgrade to address this concern. The PCM can only be reflashed by a DRB-III scan tool with programming software; any Dodge dealer and some independent repair shops can do this for you.
One other possibility is a misadjusted throttle valve cable. Here is the procedure for verifying TV adjustment:
A correctly adjusted throttle valve cable will cause the throttle lever on the transmission to move simultaneously with the throttle body lever from the idle position. Proper adjustment will allow simultaneous movement without causing the transmission throttle lever to either move ahead of, or lag behind the lever on the throttle body. ADJUSTMENT VERIFICATION
I hope this is helpful; if so, an accept would be most appreciated! thanks!