Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

3.9vlsd to 4.11non lsd..


  • Please log in to reply
5 replies to this topic

#1 tailgatewagon

tailgatewagon

    1000+ Super USER!

  • Members
  • 1,058 posts
  • Bozeman, MT

Posted 02 August 2006 - 12:33 AM

anyone done it? i have a 3.9 vlsd from a 91 leg(yep with stub shafts) and a 4.11 in my obs. im going to atempt the swap just like the 3.7-3.9 swap... anyone ever gone 3.9-4.11?????? thanks for any info....

#2 offroadsubaruguy

offroadsubaruguy

    Subaru Nut

  • Members
  • 728 posts
  • arvada, colorado

Posted 02 August 2006 - 05:53 AM

it should be the same as the 3.7 to 3.9 swap, just with different gears. just dont forget to change your front diff as well..... meaning you will have to swap trannies....

#3 ShawnW

ShawnW

    Subaru Master Technician

  • Administrator
  • 12,941 posts
  • Denver, Colorado

Posted 02 August 2006 - 10:46 PM

Let us know how it goes i am thinking of doing it.

#4 GLCraig

GLCraig

    Livin' the live

  • Members
  • 2,706 posts
  • LV, Washington

Posted 03 August 2006 - 02:23 AM

Wouldn't an OBS have the newer style rear axles where the inner DOJ has a stub shaft that's machined out of the same chunk of material? There may or may not be an issue with getting those to insert correctly into a VLSD. If there is an issue, you could probably use the stub shafts that came with the VLSD and use some rear axles from an earlier Impreza.

#5 Kostamojen

Kostamojen

    From FF-1 to BRZ!

  • Members
  • 1,692 posts
  • Roseville, CA

Posted 03 August 2006 - 12:17 PM

Just use the ring/pinion from your old diff on the new diff and you wont have to change anything else.

I've got a 3.9 VLSD WRX diff on my 4.11 RS tranny in my L via that method.

#6 Free Range

Free Range

    Chicken or the egg, hmm?

  • Members
  • 215 posts
  • Missoula, MT

Posted 03 August 2006 - 03:38 PM

should work fine, just keep the side case shims matched to their associated ring and pinion, I mixed them up on my 4.11 clutch type LSD swap and the diff slowly ate itself up in 10K miles.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users