Recently bought a 2008 Saab 9-7x with 142k. I was doing the rear diffential service (10 bolt 8.6 w/LSD) and noticed when on the lift the LSD was failed ( both wheels spun opposite directions) probably due to the terrible maintenance by the previous owners. The rear diff fluid was black, foamy and aerated and gave every impression of never having been changed in its whole life. Lots of terrible noises when putting the car into reverse on the lift, although this could be due to the transmission I fear. I guess my question is should I wait to see if the LSD will function as normal with new fluid as my mechanic seems to think it OR look to replace the rear end or what specific parts I could buy to rebuild it. Note: I will be pulling it apart again soon this week (2/18/2020) as I need to replace the pinion seal on the rear diff as well, and my parts guy screwed me and got the wrong gasket so I had to use the old one for a couple days until the new one comes in tomorrow (2/19/2020)
Thanks!
Thanks!