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That is helpful but it did not really say if GL1 will work or not. I will probably go with the NAPA GL1 for the trans and transfer case. GL5 is fine for the diffs right? I have not seen anything about them having yellow metal.

Does the GL1 offer an acceptable level of protection or do I need to wait to find GL4? I want to so it right so I don't have to replace anything

I went to get my gear oil today and quickly discovered that everything is GL5. I don't want to mess up my jeep but I cannot find GL4 for the life of me. I did see a GL1 gear oil, would that work OK in the trans, transfer case, and diffs?

From what I have seen it looks like the civi parts for the hubs will work but I just want to make sure I don't get everything torn apart just to not have the right parts on hand. I have a feeling it has been a very long time since anyone has been in this hub so it could be fun getting apart.

Thanks. I have not been able to spend too much time on the other forums because of my busy schedule. It is good to bring info like this to SS though, it seems like we are a little light on some of the M38A1 stuff. One more question, can you get all of the seals for the diffs and transfer case...

I am looking at replacing most of the fluids in my jeep before I attempt a long trip up north. My TM's all show old types of oil and lube that are not produced any more. What are most of you guys using for the engine. transmission, transfer case, and diffs. Also does anyone have a good source...