Changing gear lube...What Weight?

Joined
Dec 4, 2002
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116
I'm fixing to change the lube in differentials,transmission,and transfer case on my '78 FJ40. I won't be using synthetics on such a high-mileage vehicle due to leak potential.
Can someone tell me the weight gear lube and capacity PLEASE. ???
 
Joined
Apr 24, 2003
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2,210
80W90 here as well, and second the lube pump. this is the job i chipped half my front tooth off in.

can anyone convert gallons and quarts to real measurements (metric)
 

woody

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there is a fill plug on everything...when fluid drips out of the plug hole, it's full. If you have a rotated front/rear axle (SOA or something) then a couple extra "plunges" on the pump will overfill it enuf to keep the pinions lubed.

I've yet to measure...lol
 
Joined
Mar 27, 2003
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I bought a 5 gallon bucket of 80/90 from Autozone for $23. And a industrial pump from Napa for $50. This makes changing/adding oil under the cruiser VERY easy, quick and cheap.
 

Jonathan_Ferguson

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My Manual printed in 1986 says SAE90 for the Diffs, Transfercase, Gearbox and Steering Box. ::)

I currently have Valvoline Hypoid 85W/140 in the Diffs, Transfercase and Gearbox, And Valvoline LS90 in the Steering Box.
Previously had Mobil 80W/90 in the gearbox and I could feel and hear the Syncros have a huge whinge every time I placed it into gear. :mad: With the Valvoline Hypoid 85W/140 it's so smooth and no clunking Noises. :)
 

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