LSD on Outback Sport?
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Joined: Dec 2005
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From: Toronto, Canada
Car Info: 2000 Outback Sport
LSD on Outback Sport?
I just picked up a 2000 Outback Sport and was wondering if it had an LSD in the rear? I know the front isn't but was hoping that the rear was...
also, just wondering if Redline diff fluid would be ok for it. I've searched for the diff fluid but all I can seem to find is posts about the turbo cars and 2.5 RSs...nothing really about the "regular" Impreza diffs.
also, just wondering if Redline diff fluid would be ok for it. I've searched for the diff fluid but all I can seem to find is posts about the turbo cars and 2.5 RSs...nothing really about the "regular" Impreza diffs.
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From: SBAIC-South BayArea Impreza Club-Campbell, CA-Thur
Car Info: 2003 PSM STi
The diff is the same on the 2.5's, wrx's, outback's etc......they all use the R160 diff housing.....its the gearing and/or carrier that gets changed depending on the application.....there isn't really different gear oils for different differentials.....however, there are different weights of gear oil, depending on how you will be using the car will determine what gear oil to use. Hope this helps.
-Ted
edit: also, depending on if your rear diff is LSD or not, will also determine what weight gear oil to use. On older subaru diffs, they used to have a sticker on the diff cover that stated the gear ratio and if it is LSD or not. So take a look at that, here's what the stickers used to look like:
-Ted
edit: also, depending on if your rear diff is LSD or not, will also determine what weight gear oil to use. On older subaru diffs, they used to have a sticker on the diff cover that stated the gear ratio and if it is LSD or not. So take a look at that, here's what the stickers used to look like:
Last edited by GotBoost?; Dec 14, 2005 at 01:54 PM.
Thread Starter
Registered User
Joined: Dec 2005
Posts: 20
From: Toronto, Canada
Car Info: 2000 Outback Sport
ok, so the diff housing is the same but depending on what application, it might be limited slip or not right? I'll check the diff housing but its minus 10 outside with 10cm of snow coming tonight so I don't feel like getting under the car just yet. 
does anyone else know whether the 2000 OBS definitely does or doesn't have an LSD?
thanks!
does anyone else know whether the 2000 OBS definitely does or doesn't have an LSD? thanks!
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From: SBAIC-South BayArea Impreza Club-Campbell, CA-Thur
Car Info: 2003 PSM STi
Keep in mind that there is no real "guaranteed" way to tell if the diff is LSD or not (unless it has this sticker).....Subaru has been known to put LSDs in SOME cars (for example, Outbacks), and NOT put LSDs in other outbacks....depending on WHERE the cars final destination is......in otherwords, cars that are meant to be shipped to areas where there's alot of snow, rain and harsh weather, you might find that the Outbacks ARE equipped with LSDs, while the Outbacks that are here in CA (mild weather) may NOT have LSDs. (I have been doing a TON of research on this subject, as I am building a Datsun 510 and a Subaru LSD R160 is a very common and popular mod for those cars, as they bolt right in.) So I have been looking for a Subaru LSD R160 as well.
here's an excerpt from a Datsun website about how to find Subaru LSDs. They explain in more detail pretty much what I just said.
http://kmhafer.datsun510.com/Subaru.htm
-Ted
here's an excerpt from a Datsun website about how to find Subaru LSDs. They explain in more detail pretty much what I just said.
How do I find a Subaru LSD?
The hard part about finding these LSD units is that almost any Subaru could be ordered with one, yet very few actually were. I'd guess that less than 5% of the cars came with LSD units, judging by what I've seen in yards. Perhaps those of you in mountainous/snowy climes might see more LSDs than those of us in flat/hot areas. What this means that there is no "one" Subaru that for sure has an LSD unit of a given ratio. Most likely LSD candidates are the 4WD turbo cars, often with the 4AT (4 spd Auto) tranny. High-buck XT-6s, XT Turbos, and RX hatchback turbos also have them, and possibly even Brats. Anyway, the LSDs you'll find will be 3.70 ratio. This is fine for a street 510, and will actually make freeway driving less buzzy, as your engine revs will be lower at any given speed (compared to the stock 510 3.90 ratio), but it may hurt your 0-60 acceleration times. For an auto-x or road-racing car, you'd probably be happier with a 3.90 or 4.11. I've heard rumors of 3.90 and 4.11 Subaru LSDs, but never actually found one myself, nor seen one. As an aside, most Legacys have 4.11 R-160s that are non-LSD, giving you a 4.11 ring & pinion you can drop the 3.70 LSD clutch unit into (using the special LSD bolt set described below). I did just this by purchasing a used Subaru 3.70 LSD unit and a used legacy 4.11 open R-160 differential and creating a 4.11 LSD unit from the parts. I paid a rear-end shop $120 to drill the six 10mm holes out to 11mm so the LSD unit's bolts could be used, and to set up the newly assembled unit with the correct tolerances. Gary Savage did put a Subaru LSD carrier from a 3.70 ratio differential into his 510 using the 510 differential case, the NISMO LSD bolt set and the Nissan 4.11 ring & pinion to get the 4.11 LSD he wanted.
The hard part about finding these LSD units is that almost any Subaru could be ordered with one, yet very few actually were. I'd guess that less than 5% of the cars came with LSD units, judging by what I've seen in yards. Perhaps those of you in mountainous/snowy climes might see more LSDs than those of us in flat/hot areas. What this means that there is no "one" Subaru that for sure has an LSD unit of a given ratio. Most likely LSD candidates are the 4WD turbo cars, often with the 4AT (4 spd Auto) tranny. High-buck XT-6s, XT Turbos, and RX hatchback turbos also have them, and possibly even Brats. Anyway, the LSDs you'll find will be 3.70 ratio. This is fine for a street 510, and will actually make freeway driving less buzzy, as your engine revs will be lower at any given speed (compared to the stock 510 3.90 ratio), but it may hurt your 0-60 acceleration times. For an auto-x or road-racing car, you'd probably be happier with a 3.90 or 4.11. I've heard rumors of 3.90 and 4.11 Subaru LSDs, but never actually found one myself, nor seen one. As an aside, most Legacys have 4.11 R-160s that are non-LSD, giving you a 4.11 ring & pinion you can drop the 3.70 LSD clutch unit into (using the special LSD bolt set described below). I did just this by purchasing a used Subaru 3.70 LSD unit and a used legacy 4.11 open R-160 differential and creating a 4.11 LSD unit from the parts. I paid a rear-end shop $120 to drill the six 10mm holes out to 11mm so the LSD unit's bolts could be used, and to set up the newly assembled unit with the correct tolerances. Gary Savage did put a Subaru LSD carrier from a 3.70 ratio differential into his 510 using the 510 differential case, the NISMO LSD bolt set and the Nissan 4.11 ring & pinion to get the 4.11 LSD he wanted.
-Ted
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