1998 rearend fluid? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**desertnick69** · 08-05-2018, 06:26 PM

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?

**FIREBALL** · 08-08-2018, 07:23 PM

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

rpmerf · 08-09-2018, 10:00 AM

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.

sntrym95 · 08-09-2018, 10:20 AM

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.

**desertnick69** · 08-09-2018, 07:08 PM

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.

Tom · 08-10-2018, 08:27 PM

Start working on it before 8pm and you avoid the storms lol

**desertnick69** · 08-11-2018, 03:13 AM

Quote:

Originally Posted by Tom

Start working on it before 8pm and you avoid the storms lol

That did not work tonight!

08-05-2018, 06:26 PM	#1
desertnick69 Senior Member Join Date: Jan 2012 Location: Phoenix, Arizona Posts: 497	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?

08-08-2018, 07:23 PM	#2
FIREBALL (007) aka Houdini Join Date: Mar 2010 Location: ROCKMART/ROME GA Posts: 354	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 __________________ Live life one day at a time!

08-09-2018, 10:00 AM	#3
rpmerf Registered User Join Date: Feb 2011 Location: Parkville, MD Posts: 1,024	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. __________________ 1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z

08-09-2018, 10:20 AM	#4
sntrym95 Registered User Join Date: Jan 2006 Location: Big Pine Key, FL Posts: 745	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. __________________ Mike

08-09-2018, 07:08 PM	#5
desertnick69 Senior Member Join Date: Jan 2012 Location: Phoenix, Arizona Posts: 497	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.

08-10-2018, 08:27 PM	#6
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,691	Re: 1998 rearend fluid? Start working on it before 8pm and you avoid the storms lol __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.



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