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Old 06-25-2014, 02:15 PM
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Diff fluid

Hey guys, silly diff fluid question. Getting ready to do some diff maintenance and had a question about fluid. I'm pretty positive I don't have LS. At least there's nothing on the rear diff stating as much. The only gear oil I had at my local shop was valvoline 80w-90(which I know I need).

The small 1 quart bottle says limited slip which makes me think the additive is already added? The larger 4 quart bottle does not but I believe they're identical. As far as I know even if the additive is present it wouldn't do any harm correct?

Also the valvoline says it's good to go for gl-5 applications.

I attached photos of the diff plate and oil to double check everything above

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Old 06-25-2014, 04:11 PM   #2
Knows a couple things...

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That is a good choice of gear lube, and you are correct that presence of a limited slip additive won't harm when you don't have one.

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Old 06-25-2014, 05:41 PM   #3
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I just filled up my front and rear axles with that exact oil this morning. Good choice. Like Jerry said, the limited slip additive won't harm anything.
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Old 06-25-2014, 06:01 PM   #4
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Quote:
Originally Posted by ashtonjarrett View Post
The larger 4 quart bottle does not but I believe they're identical.
It does say "Recommended for all hypoid differentials (conventional and limited slip) ...", though.


Quote:
Originally Posted by ashtonjarrett View Post
As far as I know even if the additive is present it wouldn't do any harm correct?

No harm in using it in a non-limited slip diff.
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