Dryer was making noise and not drying clothes even though heating up. Took apart found lots of lint vacumed it out, blower wheel was wobbling and making the noise. Tightened it up, worked fine for a few minutes... now making load noise and overheating fast. Back of dryer will burn you. Help please Sue...

Make sure that exhaust vent is clear, all the way to exterior. Back should be no more than warm. Exhaust must be blocked.

All driers will do that when the lint builds up like concrete on the inside of the air ducts, but as hkstroud pointed out, you have something totally blocked which happens when you merely vacuum it out. You need to totally tear it down and scrape out and wash all of the parts except the motor, which you vacuum out. Halfway doing it will not work. This includes the exhaust vent, all the way, even the outlet on the side of the house, if you have one. You can go to YouTube to see videos on how to take it apart, but do a very good job or it will fail again quickly. I would get a new belt and change it while you have it apart and get some white lithium grease and grease any bearings you find. You need to pull the support rollers apart to grease the pins with white lithium grease. You need to clean out a drier every year, at least, according to the manual. All sensors work together by comparing temperature, so all need to be cleaned. You just unplug the wires from the sensors and remove ductwork that they are attached on (Label wires!) and clean the entire thing with soap and water. Make sure you go all through the dryer and get all parts like the blower fan and housing, vacuum out motor well and clean exhaust. Mark all wires you unplug so you know where they go. This is an easier job than you would think. You need a meter to test any fuses that may be blown. You will see them on the schematic diagram.
See: Dryer vent cleaning prevents fires - YouTube and: Cleaning out a dryer with top lint cleanout - YouTube
Cleaning out a dryer: By a woman 2 of 2 - YouTube
Manuals: https://dl.dropboxusercontent.com/u/...%20Manuals.zip