I posted on this thread: http://www.cadillacforums.com/forum...rum/106232-anyone-else-have-leaky-rear-2.htmlI know I read an old thread about this but couldn't find it. My 06 has 6k on it and is leaking rear diff fluid. Does anyone know what the issue was so I can inform the dealer?
I bet they left out the Friction Modifier, or some limited slips need a little more than others, and they needed a bit more! Heavy gear oil is great for lubrication of the bearings and contact from the ring and pinion, but some limited slips are not happy with just gear lube, and the friction levels are too high. The Modifier makes the oil more slick, which helps the clutches engage smoother and more flat together for better engagment.I posted on this thread: http://www.cadillacforums.com/forum...rum/106232-anyone-else-have-leaky-rear-2.html
There is a technical bulletin about this to add a vent and replace the pinion seals. I know eveyone says this will be back, but so far no leaks. About a week after this, I heard a grinding sound each time I slowly turned to the right or left such as entering a parking lot or leaving my garage (making a slow, tight turn). The dealer changed the diff fluid again and put in an additive, then drove in tight circles left and right in the parking lot - this was after calling for technical assistance. Well, the grinding noise went away. We'll see...at least they are trying.