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Where is the rear diff fill plug? Noob Question

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Where is the rear diff fill plug? Noob Question

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Old

Dec 21, 2011 | 06:01 PM

#1

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Where is the rear diff fill plug? Noob Question

Hi all,

Sorry for the noob question...
(On my 99 WS6)

Where exactly is the Rear diff fluid fill hole?
I saw the spot on the passenger side that faces the back right tire-about midway up the differential.

I used a ratchet to pop it off, but somehow that seems... kinda low to me?

I have royal purple & the GM additive ready to go! I'm just kinda wondering, as it seems a little low?

Thank you

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Dec 21, 2011 | 06:28 PM

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that's the one,fill to that level.

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Dec 21, 2011 | 06:34 PM

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Quote:

Originally Posted by FirstYrLS1Z

that's the one,fill to that level.

cool thanks man!

i also found a port at the very top of the diff on the passengers side, do u know what that is for?

)

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Dec 21, 2011 | 06:54 PM

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Quote:

Originally Posted by 777Shock777

cool thanks man!

i also found a port at the very top of the diff on the passengers side, do u know what that is for?

)

Thats a vent on the very top. Fill the diff through the plug on the side of the case on the passeger side. Fill up to the bottom of the threads.

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Dec 22, 2011 | 08:18 AM

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Quote:

Originally Posted by Deviant LS1

Thats a vent on the very top. Fill the diff through the plug on the side of the case on the passeger side. Fill up to the bottom of the threads.

Ah, gotcha! I was like.. wtf is this!? haha.

I didn't want to start pulling stuff apart all of the sudden haha.

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98, axle, bolt, diff, end, fill, firebird, fluid, ls1tech, lt1, oil, plug, rear, refill, trans

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