I just got my brand new T&C today and all was well until I tried to back out of my driveway. I put the shift lever in R and nothing happens. If I go to D then back to R the Tranny most of the times clunks into reverse. Is this a parking prawl problem? Prawl to torqued to release? Why is the shift lever moving to R but the prawl not going with it. Will this go away once broken in? It does not seem to have the problem on level ground only an upward incline.