Jeep Grand Cherokee Forum banner
1 - 1 of 2 Posts
I'd say 12K is a little drastic. Unless you're running through water and mud over the axles all the time. 40K-50K is probably a more reasonable strectch. If you just bought it though changing every fluid is something to consider. As for synthetic, I only use it in the D44A with a lsd because that's what's called for. Otherwise I use standard diff fluid.
 
1 - 1 of 2 Posts