Qx80 rear diff fluid

[hangout_u]

I have the 2018 QX80 with almost 40k miles.
I'm thinking to change the front and rear differential fluid.
I Google it, and found front using 80w-90 and rear using 75w-90,
I was wondering if it's good to use 75w-90 synthetic fluid for both front and rear ? Anyone done this before?
Please advise. Thanks

[Mike_S]

I use Redline 75W90 GL-5 Gear Oil, front and rear. The Owner's manual calls for "Genuine NISSAN Differential Oil Hypoid Super GL-5 80W-90" (or equivalent, and no part number), which doesn't appear to actually exist. If you search for it, you will only find people quoting their Owner's Manuals. The only 80W-90 from Nissan I can find is 999MP-1XGPP0P, which they call "Limited Slip Oil." The R180A isn't a limited slip diff, so no need for a gear oil with friction modifiers. A gallon of Redline easily handles both front and rear. BTW, the washers are M18x24 aluminum, also used in Porsche/Volvo, and you can buy 15 on Amazon for what Nissan wants for one.

I just bought a used '21 QX80, and changed most of the fluids. Make sure you grease the prop shafts. The schedule calls for every 15K miles, mine had never been done (one would have been impossible, there was paint blocking the zerk). Lots of "fines" on the diff plug magnets. This is what I came up with:

Oil 7 Qt, 0W-20, ILSAC GF-5, API SN

ATF, 'Nissan Matic S", 10 5/8 qt, lifetime (Valvoline Maxlife Multi-vehicle)
(simple drain/fill takes ~5 qts)

Transfer ATX90A, "Genuine NISSAN Transfer Fluid for ATX90A transfer", 3 1/8 pt,
999MP-TF0870P (>$60/qt!), GL-4, TF0870 (Redline MT-LV 70W/75W GL-4)

Front diff R180A, 999MP-1XGPP0P, GL-5 80W-90, 1 5/8 pt (Redline 75W90 GL-5 GEAR OIL)

Rear diff R230, KLD37-00001, GL-5 75W-90, 3 3/4 pt (Redline 75W90 GL-5 GEAR OIL)

Prop shafts (4x U-joints, 2x slip joints) NLGI #2 lithium, (Lucas Red & Tacky)

Power steering, Dexron VI, 1 1/8 qt

Brake DOT-3

Antifreeze POAT (blue)

[hangout_u]

Thanks for the information , great help.

[hangout_u]

Transfer ATX90A, "Genuine NISSAN Transfer Fluid for ATX90A transfer", 3 1/8 pt,
999MP-TF0870P (>$60/qt!), GL-4, TF0870 (Redline MT-LV 70W/75W GL-4)

Is this for the transfer case ?
I thought it just use the transmission fluid.
So, I will need to the transfer fluid for it ?
Thank you

[Mike_S]

Transfer ATX90A, "Genuine NISSAN Transfer Fluid for ATX90A transfer", 3 1/8 pt,
999MP-TF0870P (>$60/qt!), GL-4, TF0870 (Redline MT-LV 70W/75W GL-4)

Is this for the transfer case ?
I thought it just use the transmission fluid.
So, I will need to the transfer fluid for it ?

Yes. It's in your Owner's Manual, the "Technical and consumer information" section. Do not use basic ATF. The OEM stuff is apparently Shell TF-0870 (now called DTF-1). It's said to have very specific friction properties, like manual transmissions need for smooth operation of the synchros. We have active transfer cases, with clutches which can divide the torque between front and rear - not the traditional ones which simply switch between 2WD/4WD. As mentioned, Nissan will sell you the 2 qts needed for $60+/qt. Triax and Ravenol also make it and sell for less. I chose Redline because I've always had good results with their products. They recommend, in writing, their MT-LV for the application, which is good enough for me to say it's "equivalent" for warranty.

While not written about our ATX90A active transfer cases, this article discusses how they're different from older types.

If you Google "TF0870", you'll find enough discussion to keep you busy for a week, especially from the Bimmer crowd.

[hangout_u]

Is this for the transfer case ?
I thought it just use the transmission fluid.
So, I will need to the transfer fluid for it ?

I chose Redline because I've always had good results with their products. They recommend, in writing, their MT-LV for the application, which is good enough for me to say it's "equivalent" for warranty.

Thank you for the information again
I will go order two qt MT-LV (50604) from Redline.

[hangout_u]

Transfer ATX90A, "Genuine NISSAN Transfer Fluid for ATX90A transfer", 3 1/8 pt,
999MP-TF0870P (>$60/qt!), GL-4, TF0870 (Redline MT-LV 70W/75W GL-4)

Is it 3 1/8 pt ?
Pt or Qt ?
Please advise, thank you