Differential oil type

[mpaquette]

I've been changing my engine oil for years, but have never tacked a differential change. I'm going to take care of the that this weekend. The manual says to use Toyota Genuine Differential gear oil LT 75W-85 GL-5 or equivalent. So my question is, does anyone know what the LT means? I see Mobil 1 has gear oil that meets the GL-5 requirement, but no mention of the LT. Yeah, I tend to over think things.

 

[1000MPH]

I'm not an expert but IIRC...
LT is for Non-Limited Slip Differentials.
Toyota Genuine Parts 08885-02506 Differential Gear Oil LT - 1 Liter : Amazon.com : Automotive

LXfor Limited Slip.
Amazon.com: Toyota Genuine Parts 08885-02606 Differential Gear Oil LX - 1 Liter: Automotive

Yes, it's crazy expensive. I'm leaning towards redline or Mobil.

 

[mpaquette]

Mobil 1 was my first choice but it's LS and I'm not sure if that matters.

 

[1000MPH]

From what I've read, the consensus is that it's okay to put LS oil in a non-LS diff but a LS diff requires friction modifiers either in the diff oil when blended or added separately. Some people find M1 lacking for LS diffs and recommend adding extra tubes of the modifier.YMMV
Redline makes a Non-LS diff oil.
http://www.amazon.com/Red-Line-58304-Non-Limited-Synthetic/dp/B000CPI5Y6

 

[adam2562]

all it needs is 1 quart right? i'm gonna do mine next weekend

 

[1000MPH]

umm...no.
It's pg. 9 of this pdf.
http://www.toyota.com/t3Portal/document/om/OM35A36U/pdf/sec_06-01.pdf

Front:
Oil capacity
Part-time 4WD models
1.6 qt. (1.55 L, 1.4 Imp. qt.)
Full-time 4WD models
1.5 qt. (1.40 L, 1.2 Imp. qt.)
Oil type and viscosity* Toyota Genuine Differential gear oil LT
75W-85 GL-5 or equivalent


Rear:
Oil capacity
Vehicles without a rear differential lock
2.9 qt. (2.70 L, 2.4 Imp. qt.)
Vehicles with a rear differential lock
2.8 qt. (2.65 L, 2.3 Imp. qt.)
Oil type and viscosity* Toyota Genuine Differential gear oil LT
75W-85 GL-5 or equivalent

 

[adam2562]

got it.. i'm thinking those are when its dry so just a tad less than those numbers i'd assume

 

[1000MPH]

If you want some more reading, here's a discussion about diff oil from the FJC forum.
Which differential fluid - Toyota FJ Cruiser Forum

Edit: Adding a link to Mobil Delvac for further research.
Mobil 98KH09 Synthetic Gear Oil, 75W 90