Hey Svede, I saw a thread where you said were going to check your pinion nut bcs of excessive slop. Did you do it and what was the result? My diff has started popping, and its steadily getting worse, like WAY worse. I changed the fluid to the GM fluid which made it even worse. Checked the case w/ a pen magnet and there were no shavings inside so I'm HOPING its the pinion nut backed off...