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Hummer Knowledge Base

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Gear Oil to Use in the Differential:

I need to change the oil in my diffs. how much and what kind should I use?

You need to use 80W-90 Gear Oil, I would recomend getting the gallon size that way you can get a hand-pump that screws onto the top of the bottle. You need to fill it until fluid starts coming out of the fill hole.

-Clark


The best stuff is made by Cognis for AM GENERAL, 20 bucks a Litre.


1/2 qt per hub, 80W-90 gear oil

Many people use synthetic, like Mobil 1.

Dave B.
www.BlueHummer.com


2 qt per differential, 80W-90 gear oil

AZJULIAN


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