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if you want to put a Type-R LSD in your LS transmission, you'll need to get the 4.40 final drive ring from a Type-R tranny. the ring gear is identical in size actually, but the "hole" in the center is physically smaller. the LS and SI's share the same ring gear physical dimensions. ITR and GSR have a "bigger hole" in the center of the ring gear. get an ITR/GSR ring gear just to be sure.

are u thinking of changing the final drive too? i'm just wondering since ur going to tear the tranny apart anyway.

hth.


EDIT: as far as purchasing an ITR/CTR lsd for cheap, check out ur local junkyard (u might just get lucky) or ebay.
 

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it's going to be easier that way if ur going with KAAZ or QUAIFE. they have an LSD for ur specific application and it'll out-perform the OEM LSD.
 
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