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Rear differencial label codes

Old Apr 27, 2025 | 04:23 AM
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Default Rear differencial label codes

Looking to identify rear differencials with torsen lsd.
I have noticed that diffs with confirmed lsd have letter a or b on the sticker code and diffs without lsd have * code.
Is there any logic to this theory or just random?

rcf lsd diffs


ls460 fsport lsd




diffs without lsd



This is the one im trying to identify




And is there any way to know what the codes on the label mean? 36J, 2GJ, 381, etc and the numbers/letters after that?
Or is this some factory secret only they can read?

Thank you.

Last edited by Allan1; Apr 27, 2025 at 07:49 AM.
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Old Apr 28, 2025 | 09:38 AM
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Originally Posted by Allan1
Looking to identify rear differencials with torsen lsd.
I have noticed that diffs with confirmed lsd have letter a or b on the sticker code and diffs without lsd have * code.
Is there any logic to this theory or just random?

rcf lsd diffs


ls460 fsport lsd




diffs without lsd



This is the one im trying to identify




And is there any way to know what the codes on the label mean? 36J, 2GJ, 381, etc and the numbers/letters after that?
Or is this some factory secret only they can read?

Thank you.
You best bet where possible is to associate the VIN to the sticker and look up build data for that VIN.

Do a search on here, likely in the performance thread for my user name and key words like LSD, Torsen, and 327, you'll find more to add to your list. FWIW with the axles out, you can see straight through a Torsen. Open diffs will have a cross shaft for the two pinion spider gear set.
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Old Apr 28, 2025 | 12:04 PM
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Side view, clearly a shaft in the way so no good.






Thank you.
I appreciate your input on this

Last edited by Allan1; Apr 28, 2025 at 12:30 PM.
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Old Apr 28, 2025 | 12:52 PM
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That's an open crusty diff. No help.

I searched for that thread, didn't find it.
There is. this...
https://www.clublexus.com/forums/per...sd-thread.html

Look in the IS-F forum too. Although maybe I put it in my build thread?

PS if you didn't notice, my 350 has an OS-Giken in it... It makes the car amazing to drive.... so if parts cost you north of $1500, buy the OSG. You won't be disappointed!

Last edited by 2013FSport; Apr 28, 2025 at 12:56 PM.
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