When my xfirs sits for a day or three, I put it in reverse, 6 spd, and the rear wheels are frozen up. Give it some gas and it breaks free and drives ok. This just started this winter and I drive it in water and snow. What do you guys think this could be? Anyone have this same thing?

 

The fronts are probably doing it too. Given you dry it in the wet and cold, I'm guessing the Brake Rotors are rusting over and sticking to the Brake Pads.

The next time you leave it for a couple of days after getting it wet, look at the Brake Rotors before you get in the car. They will probably be rusted over. They usually do this when you wash the car too. It only takes a few minutes for the rotors to start rusting.

This isn't unusual, and it's nothing to worry about (AS long as its just brake rust)

 

you may also want to check your calipers. they may have dried out. if so lube up the pistons using some copper grease

 

Sounds like the emergency brake is freezing up. I'm guessing you're using at as you have a manual. Probably water getting in by the cable that runs under the car or in the "hat" where the e-brakes are. My guess is it'll stop when the weather warms up. Can try greasing the cable and when you pull the wheels or rotors to do a brake job cleaning and greasing the e-brake hardware.

 

I agree with the others - E-brake sticking on.
I rarely use my E-brake, I always park it and leave it in gear and use the E-brake ever so slightly. Don't rive on it as though you're trying to flip the back end out.