2012 Jeep Wrangler suspension problems

My 2012 jeep wrangler sahara 2-door with automatic transmission exhibits the following issues: 1) valve train ticking noise. This developed after a few months of ownership (bought november 2011) 2) sluggish acceleration and automatic transmission shifting when vehicle is cold. It does improve as vehicle is warmed up after driving it for 5-10 minutes, and by then the vehicle seems to operate normal. 3) I sometimes feel a thud or vibration coming up from the steering wheel.

Driving at freeway speeds some bumps or uneven surface cause car to lurch. Engine shuts down to no throttle; this is very disconcerting for driver. Happens 2-3 times a month on such roads. I suspect the skid control. When that is turned off it does not do it. Jeep needs to fix this. Car recovers after 2-3 seconds but in meantime this could easily cause car behind to hit you. So far have been lucky this did not happen.