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What oil to use in rear-diff?

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Old 11-15-11, 02:46 AM   #16
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Is it true that, from model year 2011, the ISFs use different differential oil? There was a debate going on in a local forum and it was reported that Toyota Korea confirmed '11 ISFs have differential oil that is "LSD-compatible."
I thought Torsen diff does not need "special oil"?
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Old 11-15-11, 04:27 AM   #17
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I got an '11 model, the manual states replace diff oil every 36 months / 45,000kms, using API: GL-5
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Old 11-15-11, 06:01 AM   #18
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2010 manual states @ 60,000 miles 1.42qt with "Toyota Genuine Differential Gear Oil LX 75W-85 GL-5" or equivalent
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Old 11-15-11, 01:18 PM   #19
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Quick Wikipedia search.....

http://en.wikipedia.org/wiki/Gear_oil

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Old 07-21-12, 04:58 PM   #20
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Thought I'd follow up on this. So I'm at 58,000 miles about 8 months later. I'm starting to do some of the 60K mile services. The first one I decided to do was replace the rear diff fluid. It was an easy DIY. The IS350 DIY thread really helped. There are some great pics on Page 4 by JoeZ. http://www.clublexus.com/forums/is-s...nge-diy-4.html Thanks Joe!

I was surprised at how dirty the diff fluid was, especially when it first started coming out. The magnetized drain plug had the typical glob of metal shavings on the end. I stuck my finger in the drain hole and dragged out more of the shavings before I plugged it back up to refill. The fluid pump was great in putting fresh fluid back in. I got tired of pumping though before I got 1.5 quarts back in.

My dealer charges $85 plus tax for this service. It cost me $35 plus tax. I bought two quarts of Lucas Synthetic gear oil, 75W90, for $25. Plus a $10 fluid pump. All the other tools, including the 10mm hex socket, I had at home. One tip is that you'll need a 4 in extension for your ratchet to get around the F's stock exhaust in order to reach the plugs. Taking my own sweet time, it took me 45 min to an hour from start to finish, including clean up.

I don't track my F and my fluid was still pretty dirty. So I'd highly recommend those with the 2010 and up to get this done at 60K - and sooner if you track it.
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Old 07-22-12, 12:28 PM   #21
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my personal preference is motul gear 75w90 for torsen type lsd
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Old 07-22-12, 12:40 PM   #22
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Quote:
Originally Posted by IS350atWOT View Post

I don't track my F and my fluid was still pretty dirty. So I'd highly recommend those with the 2010 and up to get this done at 60K - and sooner if you track it.
thx for your write up
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Old 09-17-13, 06:58 PM   #23
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I can't locate anywhere in my manual where it mentions this service. Mine is a Canadian spec 2010. I'll still do this fluid change at 100,000kms but find it odd.
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Old 11-25-13, 04:03 PM   #24
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I have an 09 ISF, so it does not.have the true LSD from the '10+ ISF.

Will be changing the differential fluid this week. Trying to decide if I should stick with OEM fluids for try motul gear 300 75w-90. I looked up this motul gear fluid using their lubricant advisor.

Anyone else have experience with this motul gear 300 75w-90?
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Old 11-25-13, 10:46 PM   #25
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As long as it meets GL-5 requirements, it will work fine.

Differentials have a 500k mile service life with the factory recommended lubricant. Spending more money on name brands only makes you feel good. It does not add to the service life of the unit in any significant fashion unless you are pushing it to its limits routinely. IOW - if you don't track the car, it won't matter what brand of gear lube you put in the differential as long as it meets GL-5 requirements.
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Old 11-25-13, 11:11 PM   #26
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Does anyone have a DIY on the 2008 ISF Diff. change? I have about 25,000 miles with a 2008 and think i would like to change it out for peace of mind.
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Old 11-26-13, 07:19 AM   #27
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Quote:
Originally Posted by lx470man View Post
Does anyone have a DIY on the 2008 ISF Diff. change? I have about 25,000 miles with a 2008 and think i would like to change it out for peace of mind.
pretty much the same thing. Remember always open the fill port first, just in case for some reason it seizes. Because if you drain the oil first then find out you cant open the fill, you've got a big problem

http://www.clublexus.com/forums/gs-t...ge-w-pics.html
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Old 11-26-13, 08:06 AM   #28
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Quote:
Originally Posted by lx470man View Post
Does anyone have a DIY on the 2008 ISF Diff. change? I have about 25,000 miles with a 2008 and think i would like to change it out for peace of mind.
See post #20 in this thread.
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Old 11-26-13, 01:45 PM   #29
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Quote:
Originally Posted by 4TehNguyen View Post
pretty much the same thing. Remember always open the fill port first, just in case for some reason it seizes. Because if you drain the oil first then find out you cant open the fill, you've got a big problem

http://www.clublexus.com/forums/gs-t...ge-w-pics.html
Thanks for all the info and sharing the link. I need to do this to my F soon since I have no clue if it has ever been replaced
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Old 11-30-13, 11:15 PM   #30
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Sp went through the owners manual and I cant find anywhere where it mentions anything about the differential. So what weight are you supposed to use on a 2008?

Also do you guys know the part number for the rear differential crush washer for toyota?
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Last edited by lx470man; 12-01-13 at 09:04 AM..
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Old 11-30-13, 11:15 PM
 
 
 
 
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