manual transmission gear oil - Hummer Forums by Elcova

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manual transmission gear oil

11-28-2006, 11:19 PM

Wisha Haddan H3 Wisha Haddan H3 is offline

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Join Date: May 2006

Location: Arvada, CO

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Wisha Haddan H3 is an unknown quantity at this point

manual transmission gear oil

What kind of gear oil does the H3's manual tranny use? The US part # is 89021806 (Canada - 89021807) but is it synchromesh? synthetic? or can you use any 75W90 gear oil?

Just wondering if there would any benefit (or harm) using a synthetic in the gearbox.

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2007 slate blue 5spd w/ adventure package. Still pretty much stock ... dammit

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