I have a (B18C1) GSR engine on my civic eg, i bought this LSD but does not work with 4.40 final drive (S80 gearbox).
Please help.
Anyone knows the reference o part number of this oem LSD

 

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mmm
this oem lsd works on Y2, Y21, Y1, Y2(S4C) gearbox
any B16 engine?
tks

 

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Since I have never heard of a helical B16/LS LSD, I'm going to venture to say that's the OEM helical LSD which belongs to B16B, B18C, and B18C5 Type-R transmissions. And the S80 transmission you have is an LS, with a 4.266 final drive - not a 4.400 GSR. And if it is a 4.400 FD that doesn't fit that LSD, then someone swapped in a B16 4.400 final drive on you.

 

That is incorrect. Honda did not produce a helical B16A2 LSD. This is an OEM Type R LSD. As long as you have a 1 Line center 66 tooth Ring Gear, this will work. One important step...Turn the LSD over and bolt it to the correct side You will see if it fits correctly vs the bottom side. Here is a guide to help you ID the ring gear:

 

Finally i sold my oem lsd, now i have a Quaife lsd. other GSR gearbox come with a different final drive and the oem lsd works fine. My final drive have 66 tooth ring gear with 15 countershaft, but 109.8mm diameter.
thanks for the information