Sterling 10.5 Limited Slip Question
I am hoping a Diff. Guru can answer a couple limited slip questions. First some background, I have an 03 Super Cab 4x2 with the 7.3L. I have been chasing a vibration that comes and goes for about 6 months now. It starts at around 25mph, gets better until 70mph plus and then it shakes the truck pretty good. It oscillates and is at its worse after 10 to 15 miles of driving. I have narrowed it down to the driveline. I have tried "balancing" the two piece driveshaft with a couple hose clamps and it helps but is still there. I have jacked up the rear and put the truck in gear and it looks like the drivers side rear is a little out of round so I thought that was it. Removed just the drivers side wheel, ran it up to 20mph and it was still there. Removed the passenger side, better but still there. Eyeballed the driveshaft while in motion and it looks like there is a little wobble down by the pinion, so I planned on taking it to be balanced. In the process of tightening down the lug nuts, there seemed to be a little excessive play in the backlash. Took a closer look at the diff and there is fluid leaking from the pinion flange and possible the rear cover. I spun the tires and both turn the same direction as a limited slip should. With the trans in park I was tightening the lug nuts and the drivers side wheel started turning. While watching the other wheel and turning by hand with the trans in park the opposite wheel will spin the opposite direction as with an open diff. My concern is that the limited slip is trashed or the pinion is loose and took out the limited slip. If the limited slip is trashed or the pinion is loose or both could that cause a driveline vibration as described above? Sorry for the lengthy post, just trying to get all the info out!