nathanhuu

I went with redline 75w90. Found some for cheap on OfferUp!!

Joe Z

iTrader: (10)

When I needed some quickly I just popped into Autozone..

Fair Price as well..




Definitely good for 50,000 miles give or take...

I'm about to drain and refill after a little over 170k miles..

The old mobil 1 will have 70k on it, so curious to see how clean or dirty it's going to look..

Daily driven only, no track duty..

Joe Z

BlckGhst

Interested in knowing how the old fluid will look

Joe Z

iTrader: (10)

Still goldish, not terrible at all but glad it was done.. Ended up doing all the fluids same time..





Joe Z

BlckGhst

Thats how mine looked when I checked it recently. No way of knowing if its been changed or not. Wondered if old fluid would look dark

lobuxracer

iTrader: (2)

Pretty unlikely unless the car has been heavily abused. Oil's color has little to do with its lubricity.

ChpEng

iTrader: (1)

Hi @Joe Z
Might as well change differential oil next time I lift the car.
Are the drain and fill plug gasket/washer the same part number (12157-10010)? Chilton's states there is a gasket for both.
That factory LX85 gear oil (08885-02606) is insanely expensive and clearly not an option. I am considering Redline 50104, how is your Mobil 104361 fill holding up?

Joe Z

iTrader: (10)

Hey @ChpEng .. I was using the Mobil 1 Synthetic 75w90 as an inexpensive and good over the counter price for my open diff that comes on the 08-09.. I was changing every 50k miles

Couple of months ago I wrapped up the RC F - Torsen LS-D swap out of a 2015.

Spotting the LSD DIFF-erences for IS F

I'm actually reusing this very oil right now (low miles and clean) as a flush and the Toyota LX 75-85 is going in next.. It's rated for 60k miles in the service manual..
Both are GL-5 grade and for my daily driver I probably won't notice the difference..

Yes that is the correct gasket part number x 2 for both the drain and refill plugs.
Definitely use a reputable gear oil for your OEM Torsen unit...




RC F Diff works perfect + I'm currently tire shopping....


Joe Z

JamesISF

Hi Lance, can I use Motul 75w-140 on my 2012 isf stock diff? I do track my car.

lobuxracer

iTrader: (2)

I would expect it to work just fine. I've run Red Line 75w-90 in my Supra with a factory Torsen since 1997 and put 126k miles on it myself. The only thing to be concerned about is if it chatters. If that happens, try a different oil.

Positron

I’m using Cusco 80w-140 for my Cusco LSD. No chatter noise with this gear oil.

DaveNL

The advice on the Lexus service record states (Netherlands, EU) that for track use 75W-140 diff oil and 5W-50 engine oil is to be used... with exclamation mark.

Just to conform the above comment.

lobuxracer

iTrader: (2)

I'd like to see that bulletin. There is nothing in the US or Canada suggesting those heavy oils for any purpose.

DaveNL

Enough proof for you?

lobuxracer

iTrader: (2)

Looks like a dealership list, not a Lexus EU list. Dealerships can say anything they like for maintenance, and here in North America, they frequently tell people they need a brake job when they really don't. The official guide is a booklet published by Lexus. The North American version has nothing like this in it.