Transmission & Drivetrain Gearboxes, Differentials, Clutches

Y21 B16a w/ clutch pack LSD...it clicked and clunked but it is ok? *PICS INSIDE

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Old Oct 6, 2012 | 12:18 PM
  #1  
beenba's Avatar
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Default Y21 B16a w/ clutch pack LSD...it clicked and clunked but it is ok? *PICS INSIDE

Hi Everyone,

I drove this transmission on my B16 for approx two years. During the two years of driving it it always clicked and clunked when turning corners...

I thought for sure the differential was wore out and I swapped in another tranny with an open diff.

Now I am boosted and want to go back to LSD. So yesterday for fun I decided to tear the old transmission apart to see the LSD.

I have researched about 5 hours so far into clutch LSDs, and I haven't seen ANY pictures of what these differentials are supposed to look like new. Here it was mine looks like inside.

-10 bolt final drive gear 66T


Clutch packs:


Spider Gears and Ramp unit:



Everything seems to be in excellent shape to my surprise. I don't see any chatter or cracks or extreme wear..

Was I just using the wrong fluid??? I was using a 90w fluid with some lucas LSD additive back when I was driving with this transmission.

Would shimming the clutch packs 0.020" help during reassembly?? Maybe tighten things back up to account for any wear?

Thanks!

Edit: Is using a clutch type LSD good for high HP DD? I'm making around 450whp and would like to be able to go to the track w/ slicks about once a month.

Edit#2: I should mention that this transmission has been apart before. I could tell from the RTV sealant. So maybe this inst an OEM diff???

Last edited by beenba; Oct 6, 2012 at 12:35 PM.
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Old Oct 6, 2012 | 12:45 PM
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beenba's Avatar
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Default Re: Y21 B16a w/ clutch pack LSD...it clicked and clunked but it is ok? *PICS INSIDE

Wow...could this be a mugen LSD diff?? After some more research I found these pics on this forum. They look identical to what I have.
http://www.d-series.org/forums/trans...en-tranny.html

Should I be excited? I have no idea right now.
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Old Oct 6, 2012 | 03:03 PM
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bryse68's Avatar
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Default Re: Y21 B16a w/ clutch pack LSD...it clicked and clunked but it is ok? *PICS INSIDE

noise during turns are normal with a clutch type lsd. just make sure you use the correct additive and break in the clutches properly.
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Old Oct 6, 2012 | 11:07 PM
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Mista Bone's Avatar
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Default Re: Y21 B16a w/ clutch pack LSD...it clicked and clunked but it is ok? *PICS INSIDE

1/3 tube of Tras X Posi-Lube does wonders for diff clutch chatter.

Amazon Amazon

In my Kaaz LSD I ran Penn. Synchromesh and the additive. Funny they were stocked next to each other at Autozone.
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Old Oct 8, 2012 | 05:55 AM
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beenba's Avatar
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Default Re: Y21 B16a w/ clutch pack LSD...it clicked and clunked but it is ok? *PICS INSIDE

Thanks for the tips. Can anyone confirm this is a mugen unit?
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