Problem:
As I am driving my car seems to not get into the right gear, and the RMP thing goes up to 4 when this happens. This doesn't happen every time I drive, and doesn't always happen at the same speed. Now I have notices the this seems to happen at 30 MPH, 40 MPH or 55 MPH. Also when I am going up hill is seems to slip out of gear and my MPH start to drop without me taking my foot off the gas, and again the RPMs start to go up. If I take my foot off the gas and repress it down something I can get into gear, and something I have to keep trying over and over. I have ask a few friends about this issue and they have all said many different things, but none of them really knows cars. I hope someone can help me on here. I am thinking it is going to cost me a lot cause this cars seems to need something "not cheap" replaced about every 6 months, and I am due for another big bill. Thanks for anyone who takes the time to help me.

There are several things that may cause your problem. The first step is to read the trouble codes and get a good diagnostic by a qualified technican. From your description, it seems that the transmission is misbehaving, but this may not be the fault of the tranny itself. It could be other things like a bad sensor or low manifold vacuum.

The "4" on the RPM thingy is probably 4000 rpm.