trans, transfer case, diffs oil change

[Voodoo Stu]

I would like to change the gear oil in the transmition (manual), Transfer case and both diffs to synthetic. It will really help during the cold winter months up here in Canada. How much oil do I need for the complete job and is the same kind of oil used in all the parts?

[DEWFPO]

Welcome,

All that information is neatly organized in back the owner's manual and there is also a thread around here someplace that repeats all that info but I can't find it for some reason.

75W90 for the front & rear diffs, transfer case and 6MT.

DEWFPO

[1911]

Voodoo Stu previously said:

I would like to change the gear oil in the transmition (manual), Transfer case and both diffs to synthetic. It will really help during the cold winter months up here in Canada.

Yes; for that reason I recommend a good synthetic gear lube.

Voodoo Stu previously said:

How much oil do I need for the complete job and is the same kind of oil used in all the parts?

Manual tranny: ~2 US quarts
Transfer case: ~1.5 US quarts
Rear diff: ~3 US quarts
Front diff: ~1.5 US quarts
_________________________
= 8 US quarts

But I would buy 9 because some of the specs are just over a quart and if you completely drained everything dry (almost impossible to do) you might need a little more than 8.

Like DEWFPO said, the same gear lube for all these boxes.

[Voodoo Stu]

Thanks guys!

[cruiserlarry]

1911 previously said:

Yes; for that reason I recommend a good synthetic gear lube.

Like DEWFPO said, the same gear lube for all these boxes.

That is not necessarily correct - Redline synthetic recommends using 75W90 gear oil in the diffs, but MT90 in the trans / transfer case - they use different additives, and the MT90 will allow for smoother gear shifting...

[1911]

cruiserlarry previously said:

That is not necessarily correct - Redline synthetic recommends using 75W90 gear oil in the diffs, but MT90 in the trans / transfer case - they use different additives, and the MT90 will allow for smoother gear shifting...

I didn't know he was asking about Redline; I was quoting from the Toyota factory service manual and owner's manual.

[DEWFPO]

1911 previously said:

I didn't know he was asking about Redline; I was quoting from the Toyota factory service manual and owner's manual.

X2, we were quoting the owner's manual.

DEWFPO

[F64]

Extract from Owner’s Manual: 2007 FJ CRUISER from Jan. ’06 Prod. (OM35857U)

MANUAL TRANSMISSION
Oil capacity, L (qt., Imp. qt.):
1.8 (1.9, 1.6)
Oil type:
Gear Oil API GL−4 or GL−5
Recommended oil viscosity:
SAE 75W−90

TRANSFER (full−time four wheel drive
models)
Oil capacity, L (qt., Imp. qt.):
1.4 (1.5, 1.2)
Oil type:
Hypoid gear oil API GL−5
Recommended oil viscosity:
SAE 75W−90

TRANSFER (part−time four wheel drive models)
Oil capacity, L (qt., Imp. qt.):
1.0 (1.1, 0.9)
Oil type:
Hypoid gear oil API GL−3
Recommended oil viscosity:
SAE 75W−90

DIFFERENTIAL
Oil capacity, L (qt., Imp. qt.):
Front
Full−time four−wheel drive models
1.4 (1.5, 1.2)
Part−time four−wheel drive models
1.5 (1.6, 1.3)

Rear
Without rear differential lock
3.0 (3.2, 2.6)
With rear differential lock
2.9 (3.1, 2.6)
Oil type:
Hypoid gear oil API GL−5

Recommended oil viscosity:
Front
Full−time four−wheel drive models
Above −18_C (0_F)
SAE 90
Below −18_C (0_F)
SAE 80W or 80W−90
Part−time four−wheel drive models
SAE 75W−90

Rear
Above −18_C (0_F)
SAE 90
Below −18_C (0_F)
SAE 80W or 80W−90

[doublejfj]

Don't forget the gaskets!

Drain Plug Torque Specs & Gaskets

[Peromyscus]

cruiserlarry previously said:

That is not necessarily correct - Redline synthetic recommends using 75W90 gear oil in the diffs, but MT90 in the trans / transfer case - they use different additives, and the MT90 will allow for smoother gear shifting...

In my 2008 owners manual, it says to use a GL-5 Hypoid gear oil in the transfer case for the manual transmission FJ. (GL-4 or 5 in the automatic transmission) For the MT, that would suggest 75W90 in the TC rather than MT90. I had contacted Dave at Redline about this and, given the Toyota manual's recommendation, he suggested MT90 for the trans, but 75W90 in the transfer case and diffs.