I’m going to change the rear diff oil on the 97 pathfinder and the manual calls for 80w-90 LSD oil. At the auto parts store most of the 80w-90 are conventional and not lsd specific.
The 75w-90 oils says LSD and are synthetic oil.
I did see a Lucas 80w-90 heavy duty oil that says it’s good for lsd but I’ve seen some reviews on them and most people don’t like their gear oil.
Rear Diff Oil
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mdmellott
- Posts: 1147
- Joined: Mon Sep 02, 2019 3:32 pm
- Car: '13 Kia Soul+ 2.0L AT
'02 Pathfinder SE 3.5L AT P/4WD - Location: SF Bay Area, CA
Re: Rear Diff Oil
Go with the Lucas 80w-90. I've been using it for several years without complaint. Castrol Axle Limited Slip Gear Oil 80W90 is what I used to buy but I haven't seen it in the stores for a long time or any other brand of lsd 80w-90 gear oil other than Lucas. Lucas does have a very good reputation for the quality of their lubricants. Bad reviews on anything, including personal opinions, are typically the most likely reviews to get posted. I wish more people would have listened to their grand parents. "If you can't say something nice, don't say anything at all."
Re: Rear Diff Oil
Good point, will be using that then.mdmellott wrote: ↑Sat May 22, 2021 12:06 pmGo with the Lucas 80w-90. I've been using it for several years without complaint. Castrol Axle Limited Slip Gear Oil 80W90 is what I used to buy but I haven't seen it in the stores for a long time or any other brand of lsd 80w-90 gear oil other than Lucas. Lucas does have a very good reputation for the quality of their lubricants. Bad reviews on anything, including personal opinions, are typically the most likely reviews to get posted. I wish more people would have listened to their grand parents. "If you can't say something nice, don't say anything at all."
Thanks
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RoyDaGeneral
- Posts: 140
- Joined: Wed Jun 05, 2019 10:55 am
- Car: 2002 Infiniti QX4 2WD
- Location: Berkeley, CA
Re: Rear Diff Oil
To change that fluid, does it matter if truck is cold or hot?
Re: Rear Diff Oil
It doesn’t really matter I believe. The fluid might get a bit hot if driving a prolonged period of time like on the highway. But if you’re asking if the engine itself has to be warmed up? No that doesn’t matter at all.RoyDaGeneral wrote: ↑Sat May 29, 2021 5:50 pmTo change that fluid, does it matter if truck is cold or hot?
Just make sure the vehicle is level. Should take about 3 quarts. Break the fill plug first before the drain plug.
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