i have a sierra rear disc conversion.
i have a problem with the back end coming round.
the car has extra rear line restrictors to try and help it but it still does it.
one thing i have noticed is the rear brakes drag even when pushing car on the drive.
i recon the pistons are not releasing when breaking.
the thing is the calipers were striped and are like new.
but what i cant understand is the sierra rear caliper has a spiral shaft on which the piston screw on.
i tried pushing pads back but the shaft doesnt let the pistons go back like front calipers.
you have to have a special tool to wind the pistons back in.
has anyone else had these problems or know whats going on here?