Hey guy's, I been noticing some problems with my transmission. At first my truck wouldn't engage into reverse, it would happen rarely and went away after about a month. Then as I turn on my truck today it jerked really hard as I put it into reverse. I didn't think much then I got a po700 code while driving today and I noticed that when I put it into drive now it also jerks really hard. Any ideas? I thought maybe a TCM but I don't want to buy it and realize that wasn't it. Any one ever experienced this?