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changing differential oil


 
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589Outlaw
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Joined: 27 Feb 2007
Location: middle Tennessee

PostPosted: Tue Mar 25, 2008 11:07 am    Post subject: changing differential oil Reply with quote

I need to change out the gear oil in my 97 ZJ differentials and wanted advice before I did it. I have SAE 80W-90 gear lubricant. Is that suitable for these Jeeps?
Also, do any of you use anything to flush the diff or should just simply draining it be sufficient?

Thanks for any suggestions you can give me. I have never changed it myself on a car/truck - only ATVs.
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97 ZJ Laredo - 4.0 with cold air intake, Magnaflow muffler/cat, clear corner and tails, custom tire rack
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Orangeamc13
Got Rev Limiter?
Got Rev Limiter?


Joined: 20 Feb 2006
Location: East Springfield, Massachusetts - U.S.A.

PostPosted: Tue Mar 25, 2008 11:49 am    Post subject: Reply with quote

80w-90 will be fine for regular street use. If you pull a trailer or offroad frequently you should use 75w-140. At least that's what I would do!

http://jeephorizons.com/tech/diffoil.html
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589Outlaw
Member


Joined: 27 Feb 2007
Location: middle Tennessee

PostPosted: Tue Mar 25, 2008 1:07 pm    Post subject: Reply with quote

Good deal. This Jeep is just my daily driver - seldom offroad or hauling anything. Thanks.

And thanks for the link to the tech write-up on changing it. I somehow missed it when I was searching the forum. Rolling Eyes
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97 ZJ Laredo - 4.0 with cold air intake, Magnaflow muffler/cat, clear corner and tails, custom tire rack
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Orangeamc13
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Got Rev Limiter?


Joined: 20 Feb 2006
Location: East Springfield, Massachusetts - U.S.A.

PostPosted: Tue Mar 25, 2008 2:05 pm    Post subject: Reply with quote

You're welcome!
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