Just dropped the toddler at pre school. Car was sluggish. Smelled brakes burning. Both rear sides smoking!

parked car and borrowed car to come home. Recently have replaced calipers on front, all flex brake hoses, pads front and rear. Replaced all rotors and rear pkng brake shoes.

I applied and released the pkng brake. No change. Put car in drive and was not moving.

I am guessing rear calipers have failed. Why now and why both at same time? Help!!!

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1982 300SD Light Blue
2002 Honda Accord SE
1974 Toro Wheel Horse Tractor
2000 Toyota Tundra Pickup