Exalted Grand Poobah
Join Date: Mar 2006
Location: Fort Myers, Florida USA
Model: Ford Taurus
Engine: 3.0L 12v Vulcan V6
Rep Power: 64
Look through the rear wheel spokes, if you see a shiny metal disc with what appears to be an oversized chunk of metal on it at around 10 o'clock (right side) or 2 o'clock (left side) you have discs. If you see uniform dull or rusty dull metal all around, that's the outside of a drum. If in doubt, take a photo or two and post them so we can help you determine.
Rear disc brake caliper mounting pins can develop rust spots that prevent the caliper from retracting. Brakes are the only stationary objects touching the wheels, so any grabbing will be brake-oriented; and since the parking brakes only are found on rear wheels, if the parking brake affects the problem - the problem is on the rear wheels. If you had a tranny problem, it would be affecting the front wheels.
"Mmm. Do, or do not. There is no try."
Someday, some hairy big-eared little alien is gonna steal that from me.