So I have been using my moms car (2001 Intregue) for the past 2 days and today while I was leaving a parking lot the left rear was locked up. I had the ebrake on prior to this. I noticed that only when I'm rolling forward it will roll for a bit and then lock up but in reverse I can drive all day and it won't lock up. I thought maybe it was like the old 4WD where you had to go in reverse for a while to disengage it but that hasn't worked. I go about 10ft or so and it locks up. Only the left rear does this. Anyone know why? I need the car for the rest of the week and to get home tonight so help is appreciated.