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
- - - - -

Rear LSD Diff Indentification

LSD Diff differential gear ratio identification

  • Please log in to reply
7 replies to this topic

#1 BoxerRebellion

BoxerRebellion

    Advanced Member

  • Members
  • PipPipPip
  • 114 posts
  • Portland, OR

Posted 15 August 2013 - 10:42 AM

Happy Thursday.

 

No problems involved with this thread.

Simply trying to identify where the rear diff. came from on my GL.

 

Correct me if it's stock... I don't believe it is.

 

'87 GL Wagon - converted to AWD.

Stock hub drilled to 6-lug.

 

Rear diff p# 722011002

Gear ratio - 4.111

 

Now, which differential w/ that part number and ratio out of the bag, would work with the original hubs of the GL?

 

Pics if requested.



#2 grossgary

grossgary

    Elite Master of the Subaru

  • Members
  • 20,010 posts
  • WV

Posted 15 August 2013 - 10:58 AM

6 lugs is not stock.

are you sure it's an LSD diff?

 

4.11 is found in newer generation differentials - legacy, impreza, outback.

 

manual transmissions are 3.9 or 4.11 - most 2.5 liter manual transmission models are 4.11

 

01-04 (and later) H6 transmissions are 4.11 - and they all have LSD rear differentials (VLSD type).

 

No automatic 2.5 liters are 4.11

 

there are gear ratio charts, inspect those.

subaru's opposed forces website may help.


Edited by grossgary, 15 August 2013 - 01:30 PM.


#3 Gloyale

Gloyale

    It's a sickness

  • Members
  • 9,421 posts
  • Corvallis, OR PNW

Posted 15 August 2013 - 11:23 AM

6 lugs is not stock.

are you sure it's an LSD diff?

 

4.11 is all newer generation differentials - legacy, impreza, outback.

 

manual transmissions are 3.9 or 4.11 - most 2.5 liter manual transmission models are 4.11

 

01-04 (and later) H6 transmissions are 4.11 - and they all have LSD rear differentials (VLSD type).

 

No automatic 2.5 liters are 4.11

 

there are gear ratio charts, inspect those.

subaru's opposed forces website may help.

95-99 Automatic Legacies had 4.11

 

If it doesn't say LSD or VLSD on it, it most likely is not a Limited Slip.

 

Most New gen VLSDs don't have a sticker, but they would have the "Female" axle recievers, not stubs.  Stubs built into the axle.  So if you've got your stock cups, and no sticker, you likely have no LSD

 

If the sticker just says 4.11, its probably a first Gen legacy diff (either90-94 manual or 90,91 Auto).....which have the same type stub setup as the old gen stuff so they are a direct bolt in.


Edited by Gloyale, 15 August 2013 - 11:25 AM.


#4 grossgary

grossgary

    Elite Master of the Subaru

  • Members
  • 20,010 posts
  • WV

Posted 15 August 2013 - 01:32 PM

95-99 Automatic Legacies had 4.11

is that Ej22's? 

EJ25's - like GT's, LSi's, and SUS are 4.44.

 

i edited my post to say 4.11's are found in newer gen stuff...



#5 92loyale59

92loyale59

    USMB is life!

  • Members
  • 248 posts
  • clackamas

Posted 15 August 2013 - 05:25 PM

just take off the cover and look to see if its open or not



#6 MilesFox

MilesFox

    Catch this Fox!

  • Members
  • 10,573 posts
  • Madison/Milwaukee, WI

Posted 15 August 2013 - 08:07 PM

Jack up the back of the car. Turn one wheel, if the other wheel turns opposite, you have an open diff. If it turns the same direction, it is an LSD. This is assuming ea82 hardware which is technically part time 4wd, or full time 4wd (awd with an open center diff)

 

..Unless you are telling us you have an ej trans in there. 



#7 BoxerRebellion

BoxerRebellion

    Advanced Member

  • Members
  • PipPipPip
  • 114 posts
  • Portland, OR

Posted 15 August 2013 - 09:41 PM

Well then.

Having troubles uploading pictures.

 

-5SPD manual, wouldn't have it any other way.

-AWD conversion

-'93 Impreza trans.

-LSD sticker claiming 4.11

-#722011002

 

I like the idea of jacking up the back. Hadn't thought of that. Good call.

That'll tell me what's inside.

I'll do that tomorrow, not home tonight.

 

Now - what can I take from what the car is, what the tranny is, the numbers claimed on the diff, and the stock (but drilled) hubs?

And... Aftermarket drive shaft. *cough*

 

Sorry, I tried uploading six decent pics though they didn't go through.

I feel they'd greatly aid in this confusing quest of conquering that of the unknown metal object.

 

Lemme get these pics uploaded.

 

The question is, which Subie done it?

 

Not what, but from what.


Edited by BoxerRebellion, 16 August 2013 - 12:32 AM.


#8 coronan

coronan

    Advanced Member

  • Members
  • PipPipPip
  • 57 posts
  • United States

Posted 07 October 2014 - 01:44 PM

Is the front REAR of an EA82 Turbo 25 spline? 

 

I would like to take a LSD rear diff pumpkin from ab  88 GL Turbo  and put it into my 82 brat.   

I realize i would have to swap the ring and pinion to make it 3.9 ratio.

 

Then it occurred to me that the diff my not accept my axels. :confused:

 

What would be involved???

 

THANKS!







Also tagged with one or more of these keywords: LSD, Diff, differential, gear ratio, identification

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users