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Discussion Starter · #1 ·
I have a 2010 tundra 5.7 I'm thinking of some mobile!1 for the 4x4 service and wanted to see if other owners had any luck with it. Also is it 75w90and for all three cases, and will it need any additive for the rear seeing that mobil says its a gl-5
thanks in advance!
 

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M1 75W-90 GL5 should work well. Make sure you use new washers (OEM) on everything. A spare front diff fill plug is a good idea too. The hex socket can bugger them up sometimes, especially if the factory over-torqued it.

Always remove fill plugs before drain plugs!
 

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As others have stated, always remove the fill plug before the drain plug.

When replacing the plugs, have a torque wrench, and use it.
Torque specs:
Front Differential
Fill Plug - 29 ft/lb (39 N*m, 400kgf*cm)
Drain Plug - 29 ft/lb (39 N*m, 400kgf*cm)

Transfer Case
Fill Plug - 27 ft/lb (37 N*m, 377kgf*cm)
Drain Plug - 27 ft/lb (37 N*m, 377kgf*cm)

Rear Differential
Fill Plug - 36 ft/lb (49 N*m, 500kgf*cm)
Drain Plug - 36 ft/lb (49 N*m, 500kgf*cm)

You'll need a fluid transfer pump to refill.

Mobile1 is fine, I ran it for 50k and it looked liked new. I used Royal Purple at the last change.


You can reuse the gaskets, but they are so cheap I wouldn't risk it. You can pick them up at your dealership or online at Sparks:

Replacement gaskets:
Transfer case
Fill Plug Gasket - 90430-A0003
Drain Plug - Gasket - 90430-A0003

Front Differential
Fill Plug - Gasket - 12157-10010
Drain Plug - Gasket - 90430-24003

Rear Differential
Fill Plug - Gasket - 12157-10010
Drain Plug - Gasket - 12157-10010
 

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Discussion Starter · #8 ·
I have 60 thousand on the truck now and the winter is coming so I wanted to get some synthetic in there before I have to start using the 4x4 again
 
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