Keeps slipping out of gear like the shifter linkage ain't catching.

Hello, is this a manual or automatic transmission? Sounds from your description that it is an automatic; if so, check your fluid level first. If it is full and clean and red, you could have an internal hydraulic issue causing the transmission to come out of gear. Recommend to have a shp nearby you inspect this for you. Here are some suggestions: http://repairpal.com/dodge-within-10-miles-of-hot-springs-national-park-arkansas-71901