How do I tell if I have a limited slip differential?
I know that if raise the vehicle and the tires go in the same direction it's limited slip. I know that if you open up the differential cover and compare it with pictures of limited and open differentials you can find out what you have. Right now, I don't have any jacks with me. I'd like to be able to buy the right differential fluid before I open it up. There are remnants of a sticker on the inside side of the glovebox door but you can no longer tell what it said. I didn't see any tag on the differential cover, maybe somebody took it off or it fell off when they changed the differential fluid. Is there any other way in the meantime I can tell if my XJ has a rear limited slip differential?
^^ Pretty much. When I jacked the rear end of mine up and tested it, the wheels spun oppositely indicating either no LSD, or a bad one. I popped the rubber plug out of the diff and got a nice galaxy of metal shavings in my gear oil. At this point I decided it really didn't matter what oil I ran as long as it was the right viscosity. Runs great. If you pull the plug out and its got a ton of flakes in it, you could just replace the gear oil and not add friction modifier, seeing how its already on its way out. I know this is not a scientific answer, but even if the rear diff is in 'galaxy' condition itll still run smoother with new oil. Sorry thats the best i've got.
Thanks but I mean it is just white paper that was stuck from the adhesive like somebody pulled it off. It is towards the driver side of the glovebox door outside of the actual storage compartment. There is no lettering visible.