The 3 speed auto (32RH) won't go into 1st gear, even manually. I just bought it last Saturday and didn't even realize it until yesterday. I just knew it shook a little when it first started rolling. I've never owned a Jeep but wanted one for a long time. I've got a lot of work to do but this is a priority. I think I'll start by changing the transmission fluid and filter. If that doesn't fix it I'm thinking it would need a rebuild... Anyone with insight into this or similar problem?