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Suggested grease for '59 rear end

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IowaTom View Drop Down
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    Posted: Apr/20/2018 at 4:29pm
Is the standard heavier weight grease okay to use in my '59 Super 6's rear end?  I have the cover off, draining the old stuff and would also like to pull the axle shafts to repack the bearings while the drive works are getting new lubricant.
Thanks!
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rms827 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rms827 Quote  Post ReplyReply Direct Link To This Post Posted: Apr/20/2018 at 4:45pm
Thought you were talking gear oil for a moment, LOL.  My bad.

Yeah, the newer synthetic greases should work fine for packing bearings and hold up better over time also.  Unless there's something weird I don't know about AMCs anyway.  Any time I did brakes as a tech, I repacked the bearings with the high grade synthetic stuff.

 EDIT: If I'm wrong, I'm sure somebody will be along to correct me SOON, LOL.  :D
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IowaTom View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote IowaTom Quote  Post ReplyReply Direct Link To This Post Posted: Apr/21/2018 at 6:38am
Sorry, I guess I did mean gear oil for the differential.  I've had some GL-1 sitting on a shelf for several years, some of which I used in this vintage and older Danas.  Was once told dino oils have a shelf life and thinking this stuff was opened 8 to 10 years ago, maybe I should add it to my recycle jug..?

I use synthetic grease for packing bearings and find it's super durable.
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rms827 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rms827 Quote  Post ReplyReply Direct Link To This Post Posted: Apr/21/2018 at 7:05am
Yeah, GL-1 is almost obsolete...  Recycle it.

If your car's rear end is a normal type, I'd use 80w90 GL4 oil.  If you've got any kind of "limited slip" rear end, go for a GL5 rated oil that's a little heavier than that.

It takes a long time for oil to break down, but even without that, the new stuff is formulated much better and has better additive packages too.


Here's a link to the API's (American Petroleum Institute's) page on gear oil classifications:

https://www.oilspecifications.org/api_gos.php
1964 AMC Rambler Classic 660

"You can think I'm an idiot, just don't talk to me like I'm one." - Batman
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