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Old 08-05-2018, 06:26 PM   #1
desertnick69
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1998 rearend fluid?

I replaced the axle bearings not to long ago (3 months) now they are make more noise then before. My ? is what fluid do I use? is not a gov lock. Do they use synthetic's? or just the 85 - 140 / 80-95 weight gear oil?
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Old 08-08-2018, 07:23 PM   #2
FIREBALL
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Re: 1998 rearend fluid?

I’ve had good luck using Lucas gear oil sold at advance or the zone especially their I’m thinking mine was 80/90, but double check though I’ve got a g80 and had a Yukon ls put in it to replace the factory locker. I’m not at home but I can double check my books tomorrow if someone else don’t chime in and help ya
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Old 08-09-2018, 10:00 AM   #3
rpmerf
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Re: 1998 rearend fluid?

For my 97 suburban with a gov-lock, I used 80W-90, API GL-5. I know it said to not use a friction modifier with the Gov Lock. You should be able to google around and find a factory manual.
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Old 08-09-2018, 10:20 AM   #4
sntrym95
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Re: 1998 rearend fluid?

Standard 80w-90 is what was in there from the factory, and that's all I use in mine. rpmerf is correct, do not use a friction modifier.
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Old 08-09-2018, 07:08 PM   #5
desertnick69
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Re: 1998 rearend fluid?

Thanks guys. I am just now getting it back together, I don't have a garage to put it in so with the storms here in Arizona haven't been able to do it in one shot.
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Old 08-10-2018, 08:27 PM   #6
Tom
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Re: 1998 rearend fluid?

Start working on it before 8pm and you avoid the storms lol
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Old 08-11-2018, 03:13 AM   #7
desertnick69
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Re: 1998 rearend fluid?

Quote:
Originally Posted by Tom View Post
Start working on it before 8pm and you avoid the storms lol
That did not work tonight!
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