ok, so i was pulling some cut trees to the back of my property last night on my grizzly and today when i went to take a ride, the left rear wheel was the only wheel getting power while in 2 wd. while working it yesterday i had to use 4wd and the diff lock about 6 times. while taking a close look, i noticed that while the right rear wouldnt spin, the rod coming from the differential will spin. so break the news to me....how bad is this??