2002 300m high rpms at idle and jerks
 

my chrysler 300m is driving and idles at high rpms and jerks when trying to come to a stop and it feels like it is trying to take off on me. just had my transmission rebuilt about 1000 miles ago is this a problem with the transmission or a different issue? please help

how high is high rpm? when u put it in neutral or park is it still high?

2000 to 2500 rpms and yes about 1500 to 2000 in park

When I come to a stop I have basically stand on the brake cause its want to take off. When I left my foot off the gas I can get up to about 20 mph without hitting the gas

Check throttle cable/cruise cable at rear of engine. Trans R&I may have pinched one or both. Make sure the throttle is closed and the IAC is connected and working.

u have a vacuum leak a line has come off or broken when the trans was replaced