If I read your post correctly, which is difficult because of the small font, your symptoms are the classic sign of motor failure. The solution is to replace the motor.

Well, obviously I cannot tell you that this will be the end of your repairs, or even guarantee that the new motor will fix things (that's the tradeoff of using a Forum, you save the expense of a tech visit but incur some risk) and you will have to make the decision about the motor mount (it should be ok) but look at it this way.

1. A Dryer is about as simple an appliance there is. It dries the clothes by circulating heated air in a revolving drum and exhausting the moisture laden air.

2. The motor does all the work. It turns the belt that turns the drum, power the blower that creates the air circulation. You have probably logged over 20,000 hours on the old motor so it is probably time to give it a rest.

3. Your replacement of drum rollers etc is pretty much routine maintenance for a dryer that old. Think of it as putting new tires or brakes on a car.

4. The other major expensive part on your machine is the timer. Who knows when it will fail, if ever. The gas parts may need replacing sometime also, but they are not expensive.

Bottom Line: If you had to pay a repair tech to do this work it would not be economical, but if you like the dryer and do the work yourself you will be spending far less than the cost of a new one. Also, a new one will not be any better than this one, regardless of the hype or ads or anything else they say. It will only look nicer.

My attitude towards a Dryer is you almost never replace it unless it catches on fire. In that case you will be replacing a lot of things.