Make sure your wheel cylinders are not rusted solid. Time to pull the drum off and have a look. Da-burb, I had the rear brakes on a truck lock up solid on me from gear oil on the shoes. Be fine except I was on ice and rolling at about 20mph

. HAd to leave the beater on an road that turned from snow to solid ice.
Needless to say it got creamed. Wrote off a new taurus though

.
Good Luck
CoryM
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1970 heavy duty C-10 fleetside sport truck. Vancouver B.C. Canada
http://www.geocities.com/chevroletc1070
"Take up our quarrel with the foe:
To you from failing hands we throw
The torch; be yours to hold it high."
Lieutenant Colonel John McCrae, Canadian Army