Differential housing gasket?

[rads42]

I do have the square plug, I was asking about the gasket because while I have the fluid drained I wanted to pull the cover for inspection.

[patrickt]

Originally Posted by rads42

I do have the square plug, I was asking about the gasket because while I have the fluid drained I wanted to pull the cover for inspection.

Jaguar differentials have a casting number at the lower right corner of the cover. All of the gaskets that I've seen for those type diffs had a 3931 number and then sometimes letters after the part number depending on where you bought the gasket from. But if the fluid comes out looking not metallic-ish, I wouldn't pull the cover off. It's not like you can wiggle something and tell that it's loose. If you have a problem back there, you're going to feel/hear it.

[patrickt]

And in fact I don't use the plug at the bottom -- those tend to leak when you put them back in, even with the anaerobic sealant on the threads. I pump the old fluid out through the fill hole using surgical tubing, then I put pipe tape around the threads so it's easy to get the plug out the next time and that still keeps it from leaking. Remember to use your LSD additive along with Moroso climbing gear lube. The last time I did mine I needed about 1 and 3/4's bottles of the GM Limited Slip Additive Part #1052358 to eliminate ratcheting around corners when the Powr-Lok plates would disengage.