LSD swap???

1991legacyturbo · Post by **1991legacyturbo** » Wed Jun 11, 2008 9:12 pm

I have a Mint 3.90 lsd rear diff,
anyone want to trade for a 4.11 lsd???

if not, anyone want to buy a 3.90 lsd??

ciper · Post by **ciper** » Wed Jun 11, 2008 10:39 pm

You currently have an open 4.11 differential right? Take it apart, take the 3.9 lsd apart and swap carriers.

End result is an open 3.9 and a 4.11 LSD. I did this by myself with no special tools in my driveway (does a reverse torx driver count?). Keep everything else exactly as it was including the backlash spacers. You don't even have to loosen the pinion bolt!

1991legacyturbo · Post by **1991legacyturbo** » Wed Jun 11, 2008 11:57 pm

Hmm, how long did this take you to do, are you sure a home mechanic can do it??

i just did my auto to manual swap with no problems, just no lsd anymore

ciper · Post by **ciper** » Thu Jun 12, 2008 2:34 am

Way easier than an auto to manual swap. You know how to take the differential out right? Thats the hardest part.

1991legacyturbo · Post by **1991legacyturbo** » Thu Jun 12, 2008 4:12 am

i know how to take it out, i put the new open diff in

so i open it up and just swap the clutch pack??

Post by **Legacy777** » Thu Jun 12, 2008 5:03 pm

There's no clutch pack. It's a sealed viscous coupling.

It shouldn't be too difficult once you get everything out and see how it works....but without pictures, it's a little difficult to describe.

93forestpearl · Post by **93forestpearl** » Thu Jun 12, 2008 8:17 pm

I've taken a couple apart, and its not too big a deal. If you can swap the carrier without removing the pinion that would be ideal, since the backlash would need to be set if you did remove the pinion.

ciper · Post by **ciper** » Sat Jun 14, 2008 9:18 pm

1991legacyturbo wrote:i know how to take it out, i put the new open diff in

so i open it up and just swap the clutch pack??

Like they said no clutch pack. Only some of the pre Legacy Subarus had clutch based LSD. Yours is most likely viscous if not gear based.

Basically remove everything in the "back" of the differential and swap the largest internal part of one unit with the largest internal part of the other. I think there are about 12 bolts holding the ring gear to this part.

1991legacyturbo · Post by **1991legacyturbo** » Sat Jun 14, 2008 10:52 pm

alright i may try this, but i am scared i will fudge it up, i dont want to ruin the tolerancees

ScottyS · Post by **ScottyS** » Wed Jul 23, 2008 1:11 am

When you do this swap, can you use the old LSD axles in the new 4.11 diff, or do you have to use different axles?

kamr0n · Post by **kamr0n** » Thu Aug 07, 2008 2:51 am

ScottyS wrote:When you do this swap, can you use the old LSD axles in the new 4.11 diff, or do you have to use different axles?

x2

i'm looking for parts. i have 4.11's that are open and i need lsd*

(*need it to fulfil my wants.)

mexicanzero · Post by **mexicanzero** » Tue Sep 23, 2008 3:55 am

so if i were to stick the lsd part of a diff in my diff would i still use my cv shafts or the ones meant for the lsd diff?

thanks
-Alex

ciper · Post by **ciper** » Wed Oct 01, 2008 2:37 am

All of the axles should be female. All female R160 axles are compatible.

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LSD swap???

LSD swap???