I would like to disable the 2-way tumble action. Works great till it stops to change direction. It is then stuck, we have to reach in and manually turn the drum to get it moving again! Now it seems to not b heating up! And we've had some if the high pitch squealing! Very, very unhappy with the dryer!

It sounds like you have a dryer with dry bearings. They must be lubricated with white lithium grease or they will be ruined, unless they are already. Dryers need to be torn down and cleaned once a year. You will have to totally tear this dryer down and clean it and find the bad hi-temp cut-out. Most of them are round with an oval flange on it to screw it to the duct in the dryer. You test it with an ohm meter where "0" is good and infinity is bad. See: https://dl.dropbox.com/u/8010163/How%20to%20use%20Test%20Equipment%20Service%20Manu al.pdf