Fluids for front diff, rear diff, transfer & manual tranny?

[stevegillings]

Coming up here to the 30K mark, and thinking of replacing all the fluids with synthetics.
I am planning on using M1 75W-90 for all 4. Will this be ok? Has anybody else done that? According to the manual, just "gear oil" 75W-90 is needed for the manual transmission, the front diff and the transfer case. So the M1 gear lube should be better than what's required.
The rear diff calls for hypoid gear oil 90W or 80W-90 if I remember correctly. I believe "hypoid" would be any GL-5 gear lube, correct? So the M1 would be fine as well, as I doubt that the slight weight difference matters, correct? And the weight is a "recommendation" anyway.

Any comments, will this be fine? What do you guys do / think?

[demoncleaner]

I used 75w-90 Full syn QS in tranny, front diff, and transfer. M1 will work fine. Rear Diff went with 80w-90 semi-syn (LSD).
I wouldn't use full syn in the rear diff if you have an LSD. Guys have reported LSD chatter, Open diff, should be no problem.

[pdxyota]

MANUAL TRANSMISSION and TRANSFER CASE: GL-4 REDLINE OR AMSOIL 75W-90 because it's the recommended oil for the tranny AND it will prolong the life of the copper internal parts AND it shifts better. If you have auto someone else will chime in. I have REDLINE MT-90 in my tranny, shifts nicer and my gas mileage is slightly better now.

FRONT DIFFERENTIAL: GL-5 75W-90
REAR DIFFERENTIAL: GL-5 75W-90 (or if below 0 80W-90).

I have Mobil1 75W-90 in both diffs, I like it very much. I had Amsoil 75W-90 GL-5 in the tranny & it was fine, but notchy and when I changed it last it was full of billions of shiny metal shavings.

[stevegillings]

Thanks demoncleaner & pdxyota!

I have done some more research as well, and it looks like I will go with M1 75W-90 or Redline 75W90NS for front & read diff, and will use Redline MT-90 for the manual transmission and the transfer case.

One thing I am wondering about: everybody seems to recommend a GL-5 gear oil with the friction modifier (like M1 75W-90 or Redline 75W90). While the modifier should not hurt my non-limited slip diffs, a GL-5 gear oil without it (like Redline 75W90NS) should be equal or better, right?!?

[Jerickson]

Make sure you get the proper limited slip additive when you do the lube change in the rear diff. I had mine done and the shop didn't add it. Within 50 miles my truck was squealing, groaning, clunking, and grinding around every turn. I flushed it out and used the right stuff but still haven't gotten rid of all the noises while turning at low speeds. I'm just hoping nothing got chewed up in there while it had the wrong lube in it.

[stevegillings]

I don't have a limited slip diff.

[pdxyota]

Originally Posted by stevegillings

I don't have a limited slip diff.

Then regular Mobil1 75W-90 GL-5 front & rear differentials.
Redline MT-90 75W-90 GL-4 in tranny & transfer case.

10mm hex for front differential, ALL the rest take a 1/4" 14mm socket (is that right guys?)

NO ADDITIVES NEEDED

#1) Get to your dealer & get ALL the crush washers you'll need to replace the ones in there now. ($5-7)

#2) Open the FILL plugs on each unit first.

#3) When your tranny stops taking fluid & it's draining out, jack it up and put a tiny bit more in (1/2 cup or slightly more). It is supposed to add a bit of protection and shouldn't blow out the breather tube.

#4) use gloves

[Gregory_K]

MANUAL TRANSMISSION
Oil capacity, L (qt., Imp. qt.):
2TR- FE engine
Two- wheel drive models
2.6 (2.7, 2.3)
Four- wheel drive models
2.2 (2.3, 1.9)
1GR- FE engine
1.8 (1.9, 1.6)
Oil type:
Gear Oil API GL-4 or GL-5
Recommended oil viscosity:
SAE 75W- 90

TRANSFER
Oil capacity, L (qt., Imp. qt.):
1.0 (1.1, 0.9)
Oil type:
Gear Oil API GL-4 or GL-5
Recommended oil viscosity:
SAE 75W- 90
DIFFERENTIAL
Oil capacity, L (qt., Imp. qt.):
Two- wheel drive models except PreRunner
3.31 (3.5, 2.9)
Four- wheel drive models and PreRunner
Front (four- wheel drive models)
1.50 (1.6, 1.3)
Rear
2.80 (3.0, 2.5)
Oil type:
Without limited- slip differential
Hypoid gear oil API GL- 5
With limited- slip differential
Hypoid gear oil for limited- slip differential
API GL- 5

Recommended oil viscosity:
Front
SAE 75W- 90
Rear
Above -18
C (0
F)
SAE 90
Below -18
C (0
F)
SAE 80W or 80W- 90

IAW 2005 TACOMA from Mar. ’05 Prod. (OM35862U)

[stevegillings]

Gregory, I did know what the manual says, but thanks anyway for typing all of this!

[stevegillings]

Originally Posted by pdxyota

10mm hex for front differential, ALL the rest take a 1/4" 14mm socket (is that right guys?)

For the rear diff, you'll need a big 24mm socket.

[Gregory_K]

I just ctrl+C and ctrl+v.

over at www.mytoyota.com you can view PDF's of the ownersman and pasport for your toy car or truck.

[stevegillings]

Originally Posted by Gregory_K

I just ctrl+C and ctrl+v.

over at www.mytoyota.com you can view PDF's of the ownersman and pasport for your toy car or truck.

Thanks anyway!

[DW]

I'm using Redline MT-90 in the 5-Speed M/T and Mobil 1 75W-90 in the Front & open Rear Differentials and in the Transfer Case of our '08 regular cab 4WD, 2.7L Tacoma.

[Gregory_K]

I went with Amsoil SVG for all. Sat I plan on doing the install