You have pretty much comfirmed that the motor is bad. It is cutting off on a heat overload. I just did 2 motor jobs on that dryer last week. Both of my customers did the repair job. Those are great dryers, and that motor is not that expensive. I will tell you this, the blower wheel might not want to come off after all those years. Usually it is a 50-50 chance. If you want to try to get the blower wheel off before you buy the parts. Take the front of, and the drum out, and the way I do it is, I get an adjustable wrench or a wrench that will fit snuggly on the blower wheel, right behind the motor. You might have to take the metal clip off of the back motor mount to get to it. Then get a wrench or plyers, and hold the motor pully from turning, and then turn then you will have to turn the wrench on the blower wheel to the left to losen. It ain't going to be easy. But if you get it off, great, if not, the blower wheel is cheap too. If you can't get the blower wheel off. There are two screws that hold the lint filter down on the top of the dryer where you pull the lint filter out. Remove them, and the lint filter, and then go to the back of the dryer, and take the back off the dryer, and then take the four screws that hold the lint filter assembly in place, and remove the whole assembly, and that is where the blower wheel is. I get a hammer and break the blower wheel with it, till you are able to remove the motor from the front. Once you realize you can get the blower wheel off, then remove the mounting clips holding the motor in place. The part # for the motor is 279827. The part # for the blower wheel is 694089. I hope this helps. Tom Appliance Educator, Appliance Parts, Washer and Dryer Parts, Refridgerator and Freezer Parts, Stove and Oven Parts