I swapped in a D44 and 14bff, in place of the 1/2 ton 10b. I also installed 4" TC + 1" zero rate (front); ORD flip + 5/8" zero rate (rear). I used a new trick #447 u-joint for the d-shaft to 14bff pinion. There were vibration issues that were cured by lowering the crossmember/t-case. The problem: After driving the K5 for about 2 miles at approx. 25-30 mph, I started to hearing squeaking from the rear, that ended up turning into a loud squeal. At at few points, it felt as though the brakes were sticking or being applied, without my foot on the brakes. I ended up driving it back home at a crawl (less than 5mph), and it continued to squeal from the rear, and at times made a grinding noise (similar to when disc brakes are gone (metal-to-metal). Any ideas? I have no clue what it could be; almost as though something is overtightened. The d-shaft straps are to specs (i think 20 lbs).