Gear oil in front diff. on 300 4x4?

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Feb 4, 2001 | 10:33 PM

Frank300

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Trailblazer

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I had to drain the diff fluid in the front diff this weekend and was wondering if it is o.k. to use standard 80-90w gear oil or should I strickly use 80w as it states on the diff. case?

Feb 4, 2001 | 11:25 PM

BigRed450

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80-90 gearlube will be fine. Do not use synthetic unless it specifies for Limited-Slip differentials.

Feb 6, 2001 | 04:09 AM

trailboss450

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Also remember to add some GM limited slip differential additive. If you don't you will develope a chatter noise in the front differential when turning.