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Old 07-19-2003, 01:38 PM   #1
stimpy
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Default What Cars Came With A Rear LSD?

Since the FAQ was getting huge with my single question posts, I figured I would do a different format and create a new thread. I'm poking around in the FSM's, and while they give a LOT of information, there are a few holes as to which models actually had the LSD. Please feel free to correct me if I have made an error.

Unless specified, the LSD uses male axles and is a viscous coupling unit.

Impreza:
2000-2001 2.5RS 5MT, 4.111
2000-2001 2.5RS 4EAT, 4.444
2002+ WRX 5MT, 3.545,
2002+ WRX 4EAT, 4.111
2004 WRX STi 6MT, 3.900, mechanical

SVX:
1992-1997 AWD 4EAT, 3.545 final drive, has axle stubs

Legacy:
1991-1992 Turbo 5MT (Sedan only?), 3.900 final drive, has axle stubs
2000 GT, GT-LTD, Outback-CW, Outback-LTD, Outback-SDN (excluding Outback, Brighton, and L)
2001+ 2.5L (Excluding Brighton and L) 5MT, 4.111
2001+ 2.5L (Excluding Brighton and L) 4EAT, 4.444
2002+ 3.0L (H6) Outback and Outback-SDN 5MT, 4.111
2003+ Baja, see Legacy specifications

Forester
2000-2002 Forester S 5MT, 4.111
2000-2002 Forester S 4EAT, 4.444
2003+ with Disc Brakes 5MT, 4.111
2003+ with Disc Brakes 4EAT, 4.444
2004 XT Turbo 5MT and 4EAT, 4.444


-Jon
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Old 06-03-2004, 10:05 PM   #2
IronMonkeyL255
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My '91 Legacy Turbo 4EAT has a 3.900 LSD.

I don't believe it was just 5MTs that had 'em.
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Old 06-03-2004, 10:38 PM   #3
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That is correct, the 4EAT 91 Leg T's came with the rear LSD as well.
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Old 06-04-2004, 07:44 AM   #4
wawazat
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Exclamation Modification required.

No stubs on the SVX rear VLSD diffs.

Todd
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Old 06-04-2004, 11:10 AM   #5
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the svx and STI rear diffs are r180s

Quote:
1991-1992 Turbo 5MT (Sedan only?), 3.900 final drive, has axle stubs
USDM models only the canadian models from those years are open

the xt6 also used a r160 with a 3.70 ratio
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Old 06-05-2004, 09:10 PM   #6
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will the r180 from the svx/STI bolt into the gc8? (disregarding the gear ratios)
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Old 06-05-2004, 10:18 PM   #7
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i dunno

diffs don't bolt directly to the sub frame so if you had the right bracketry ... yeah i guess?
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Old 06-06-2004, 11:11 AM   #8
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91' Legacy RS used 4.111 rear LSD (Jap Spec)
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Old 06-06-2004, 11:12 AM   #9
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And you can also add 92-94 Liberty/Legacy RS and RS-RA to the list
...

Also...didnt the 1999 Impreza have rear LSD as well? I thought it was the first year, because my car certainly does, and I never switched out the rear end. Unless the owner before me did.
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Old 06-06-2004, 01:11 PM   #10
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02 RS 2.5 have it?
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Old 06-06-2004, 02:48 PM   #11
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Quote:
Originally posted by Schlogen
02 RS 2.5 have it?
Nope, it doesn't.

The 99 Impreza 2.5RS's had it, I thought. I was pretty sure just the 98's didn't, for that body style.

Neil
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Old 06-06-2004, 06:12 PM   #12
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whats the deal with the stub axels/no stub axels thing? are they not compatable?
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Old 06-06-2004, 11:51 PM   #13
rob
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Quote:
Originally posted by Structure828
Also...didnt the 1999 Impreza have rear LSD as well? I thought it was the first year, because my car certainly does, and I never switched out the rear end. Unless the owner before me did.
It was an option for '99RS. It was standard in '00 and '01.
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Old 06-07-2004, 02:34 PM   #14
stimpy
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Lemme see if I remember.

Many of the late model axles have a male end that inserts into the rear differential. Some of the older models required axle stubs because the axles themselves did not have a male end. The axles were a flange type kind of similar to the front axles (but not really). For this to work, the rear differential requires a 3-4" long axle stub to which the axle will mount to.

-Jon
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Old 06-08-2004, 01:28 AM   #15
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anyone know if the wrx lsd is compatible with the older impreza L rear ends (as far as mounting goes, not the actual gear ratios)
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Old 06-08-2004, 08:06 AM   #16
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Quote:
Originally posted by sick1.8t
anyone know if the wrx lsd is compatible with the older impreza L rear ends (as far as mounting goes, not the actual gear ratios)
See the above post.

You'll have to either source newer axles or take the stubs from your current diff and insert them into the LSD first. Also, you'll have to do some minor clearance grinding inside the older housing to fit the (slightly larger) LSD in place. There is some good info in the drivetrain forum by Joel Gat regarding the swappage and fitment issues of LSD's, both OEM and aftermarket.

It's my understanding that with the older diffs, you can remove the stubs and then use newer type axles.
(without taking the ring gear into consideration)

Jay Storm
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Old 06-08-2004, 09:51 PM   #17
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so i can source a wrx lsd rear end (complete), then i can make it work with that and just inserting my old impreza L stub axels into it, then using my existing axels.
i'd like to keep my existing axels if possible.
thanks for the info
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Old 06-09-2004, 02:18 AM   #18
shinjyo
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So what is it on my 2003 Impreza 2.5 Sedan?
Is it just an AWD or something like central differential XXX
Do it function totally different with the LSD??
WOud u mind explaining it to me??
Thanks!
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Old 06-09-2004, 09:53 AM   #19
Wedge
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2001 was the last model the RS (2.5) came with a rear LSD. It's open, in other words, it doesn't compensate for power differences between the rear wheels, same goes for the front one.
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Old 06-09-2004, 11:12 PM   #20
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How can you tell if you have an LSD differential with out opening it up? I have one that is supposed to be from an 02 WRX. I'd like to know that I didn't get cheated.
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Old 06-12-2004, 12:44 AM   #21
sick1.8t
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something i ran upon:
http://kmhafer.datsun510.com/Subaru.htm

Clutch-Pack LSD:
1985-1986 (production up to 3/86) XT 4WD is listed with a 3.70 LSD option (Subaru part # 7220 11000).
1986-1987 (production from 4/86-10/86) GL 4WD is listed with a 3.70 LSD option (Subaru part # 7220 11001).
1986-1991+ (production from 11/86) Loyale/GL 4WD is listed with a 3.70 LSD option (Subaru part # 7220 11002).
1988-1991 GL and XT-6 4WDs with single range transmissions are listed with a 3.90 LSD option (Subaru part # 22011 GA022).
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Old 06-12-2004, 12:45 AM   #22
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Quote:
Originally posted by uberbrighton
How can you tell if you have an LSD differential with out opening it up? I have one that is supposed to be from an 02 WRX. I'd like to know that I didn't get cheated.
turn one of the half shafts (axel connections) and the other side should turn the same direction, if it turns the opposite direction, its a non-lsd.
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Old 06-12-2004, 12:58 AM   #23
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yep.. agree w/ sick1.8t... the 86 GL10 Turbo my friend has the the above mentioned LSD (almost positive it was standard on the GL10T).
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Old 07-04-2004, 02:43 AM   #24
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a sube tech at a dealership said that the svx rear end wont directly bolt into the rear of an impreza. i'm not sure if he also ment the axels are the wrong length or if its just the housing wont fit into the existing bracketry. anyone have any info on this? i was under the impression that all newer rear ends would bolt into the impreza, set aside the whole stub axle thing.

and is the svx rear really a R180?
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Old 07-04-2004, 10:24 AM   #25
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i believe so ..
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