'02 towne and country,when I put it in drive car bucks 3 times then moves and sometimes when I put in reverse vehicle doesn't move.Any ideas where to start? No check engine lights. Thanks

 

Transmission fluid level good? Verify the solenoid pack connection is not contaminated with fluid and is clean and tight. It's on the front of the transmission. http://www.justanswer.com/uploads/sp...224858_sol.jpg

I suspect the torque converter or something in it's circuit is at fault.