Your question leaves a lot of unanswered questions. If "the engine thumps" each time you shift between drive and reverse, it could be a failing universal joint. This would definitely be more noticible (and damaging)when shifting at higher engine speed . you said that your engine was racing at ~2k rpm ; that sounds like a separate problem...stuck choke, linkage, etc...that should also be fixed, because engageing gears at those rpms is BAD for the entire drivetrain.
http://www.autozone.com/servlet/UiBroker?UseCase=S001&UserAction=viewSimpleDiagInfo&Parameters=info
I had the same problem with a grand am I had I would have your motor mounts checked
The 2005 Chrysler 300 has a V6 engine.
The 2005 Chrysler Town-AND-Country has a V6 engine.
The 2005 Chrysler 300 has a 2.7 L base engine size.
The 2005 Chrysler Town-AND-Country has a 3.3 L base engine size.
The 2005 Chrysler 300's engine produces 190 hp @ 6400 rpm.
The 2005 Chrysler 300's engine produces 190 ft-lbs. @ 4000 rpm.
The 2005 Chrysler Town-AND-Country's engine produces 180 hp @ 5200 rpm.
The 2005 Chrysler Town-AND-Country's engine produces 210 ft-lbs. @ 4000 rpm.
In the engine and radiatorIn the engine and radiator
It is on the bottom of the engine.
YesYes
You can find an engine diagram for a 2005 Chrysler Town and Country in the car's owner's manual. You can also find it at different auto part stores.