If im not mistaken, the dryer has to holes at the bottom on both sideswith plastic round covers over them, when you remove those 2 plastic covers, you will see the 2 mounting screws that join the top of the washer and the bottom of the dryer together.
Just remove those screws and it should come off, you may have 2 hook slides in the rear, that will come free once those 2 screws in the front are removed, and you lift the front of the dryer up, you can then slide the rear out of those hook slides.
clarification....Remove the 4 screws in the brackets on the rear of the unit(s) where they meet, then tilt the front of the dryer up and slide it forward off the washer. Hopefully you kept the porcelain top panel. If not Sears.com parts sells them for like $30 which is a bargain. Enjoy !