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Old 03-28-2005, 06:37 AM   #1
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Default how do I tell if I have positraction axle

I do not have a glovebox sticker so I dont know my axle...I want to change fluid with Mobil ! synthetic but I'm not sure if I need to add the limited slip fluid...What would happen if I didnt? what would happen if I did & my axle wasent a positraction one? Its a 01 Z28 with automatic transmission...Thanks
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Old 03-28-2005, 07:46 AM   #2
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All LS1s got some sort of posi unit, either Torsens or Aurburns. If you have a Aurburn, you don't need additive, the Zexel Torsens do need it. From what I've read only 98s got Aurburns and 99+ all got the Torsens. Probrably wound't hurt it even if you did put limited slip additive in with an Auburn.
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Old 03-28-2005, 08:30 AM   #3
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GM Muscle pretty much covered it. You can also check the gear ratio by looking at the plate on the end of the driver's side door. GU2 = 2.73, GU5 = 3.23. GU5 also comes with an aluminum driveshaft.
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Old 03-28-2005, 12:14 PM   #4
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punch it and see how many tire lines you leave
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Old 03-28-2005, 12:43 PM   #5
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Mine pops alot (i guess from the slip being limited) when i really lay on it from a stop.
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Old 03-29-2005, 12:15 AM   #6
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Quote:
Originally Posted by GM Muscle
All LS1s got some sort of posi unit, either Torsens or Aurburns. If you have a Aurburn, you don't need additive, the Zexel Torsens do need it. From what I've read only 98s got Aurburns and 99+ all got the Torsens. Probrably wound't hurt it even if you did put limited slip additive in with an Auburn.
Agree with everything except the posi's are backwards: Auburn needs additive, Zexel doesn't.

For SS' and Firehawks: Yes, `98 got an Auburn standard, `99+ got the Zexel. NOW your `98 could have a Zexel and your `99+ can have an Auburn IF you car has SLP options. SLP offered the Zexel (98) then the Auburn (99-02) as Y2Y options just like the Bilstein, Dual/dual, etc. Check your door jam to make sure.
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Old 03-29-2005, 12:22 AM   #7
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Quote:
Originally Posted by spy2520
Mine pops alot (i guess from the slip being limited) when i really lay on it from a stop.

It might be damaged....
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Old 03-29-2005, 10:03 AM   #8
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Quote:
Originally Posted by Kurt D
Agree with everything except the posi's are backwards: Auburn needs additive, Zexel doesn't.

For SS' and Firehawks: Yes, `98 got an Auburn standard, `99+ got the Zexel. NOW your `98 could have a Zexel and your `99+ can have an Auburn IF you car has SLP options. SLP offered the Zexel (98) then the Auburn (99-02) as Y2Y options just like the Bilstein, Dual/dual, etc. Check your door jam to make sure.
Yep, I typed it backwards. The Aurburn should get the additive not the Torsen. Torsens are gear designs and the Aubruns are clutch designs hence the additive.
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Old 03-29-2005, 02:48 PM   #9
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Both wheels in the air, a Zexel will counter-rotate like
an open diff (unless it's a T-2R, which is rare aftermarket-
only) while an Auburn or other clutch type will turn both
in the same direction.
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Old 03-29-2005, 03:44 PM   #10
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Put some Gm slip additive in and get in a vacant lot. turn your steering wheel all the way to right and make some circles then turn it to the left and do the same. Don't try to cut no donuts just take it easy and this will usuallty take care of the 98 popping noise.
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Old 03-29-2005, 04:41 PM   #11
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Quote:
Originally Posted by NC98Z
Put some Gm slip additive in and get in a vacant lot. turn your steering wheel all the way to right and make some circles then turn it to the left and do the same. Don't try to cut no donuts just take it easy and this will usuallty take care of the 98 popping noise.
Oh, really? Thats good to know, i figured it might have been normal, i'll check it out.
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Old 03-30-2005, 02:19 PM   #12
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http://www.ls1tech.com/forums/showpo...5&postcount=17
g80 in the rpo list
the RPO list is on the drivers door jam
JRP's FAQ For Commonly Asked Questions
read all of this
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Old 03-30-2005, 08:56 PM   #13
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WHAT THE!!!...............do you mean i have to worry about my rear end?.......i just put mobil 1 synthetic in my baby....................
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Old 04-01-2005, 04:16 PM   #14
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Quote:
Originally Posted by LiquidFire350
punch it and see how many tire lines you leave
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Old 04-01-2005, 04:16 PM
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