Diff Type/Fluid
Diff Type/Fluid As you can see in my sig, I have a 99 Z28, do I have the Auburn, or the Torsen differential? Also, I want to change the fluid in it, and in the owners manual it says to use SAE 75W-90 for the fluid, do I need to put an additive as well into there (Depends on what diff type I have)? Thanks.
I'd put the additive in it. Even if the differential doesn't need the additive, it won't hurt anything. Bob
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you have the Torsen LSD, (should have anyways) and it does not require the additive. the additive is a friction modifier which makes the clutches in an Auburn type LSD slip so it doesnt destroy them when turning. the Torsen has no clutches to slip, so an additive is pointless, but as Bob said, it wont hurt anything.
99+ had the Torsen, and no need for the additive
some SS's and firehawks got the Auburn from SLP, but not sure how to check other than pulling the diff cover.
the additive can be had at any autoparts store, usually its around the gear lube, but check because some gear lubes already come with the additive.
some SS's and firehawks got the Auburn from SLP, but not sure how to check other than pulling the diff cover.
the additive can be had at any autoparts store, usually its around the gear lube, but check because some gear lubes already come with the additive.
Teching In
Joined: Mar 2008
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From: Oklahoma City, Oklahoma U.S.A.
rpo Yes if you can list your RPO codes i can check and see which you have. I have a 2000 SS and i have an auburn with clutches which does require the additive. The additive can be had at autozone or o'reillys. You can pull your cover and check visually to be sure. If you see thin disks that look like auto tranny clutches then you need the additive. I recommend mobil 1 75-90 and the gm additive...
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99 and up thx bww3588 thats what i was looking for! Also was LSD not everything they offered or could you get something else, i mean what would the RPO code say besides LSD??
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Verdad Gallardo some people can look up the VIN and tell you what SLP options a certian SS or Firehawk had, but the RPO sticker wont tell you wether it had the Auburn or Torsen. if you have the WS6 in your sig, its got eh Torsen, and doesnt require the addative. however...it cant hurt to put it in. some people have put it in and noticed a quiter acting diff.
personally, i would put it in regardless, its better to have it when you dont need it, than not have it when you do.
personally, i would put it in regardless, its better to have it when you dont need it, than not have it when you do.
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Teching In
Joined: Mar 2008
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From: Oklahoma City, Oklahoma U.S.A.
Uh oh At risk of admitting to a huge mistake here I have the auburn and used syntec 75-90. Did I hurt my diff or do irreparable damage to my gearset? Can it be fixed by switching back to dino lube?
