Trans/diff info

[goodnight1985]

I am looking into a possible rear LSD for my 97 2.5 GT 5 speed manual. Before I continue, I wanted to know about the factory LSDs found on some outbacks.

If I am not mistaken, the final drive on my car is 4.11
The final drive on a manual outback is 3.9
The final drive on an auto outback is 4.11

If this is correct, is it possible to put a rear LSD from an outback into my car?

Also what year outback diffs fit?

[Huffer]

Yep, its possible, but just make sure the LSD is the right kind for your purpose. Any diff from 95-99 will fit. Also impreza diffs will fit too, just not the driveshaft due to the length.

[NGTD]

I am looking into a possible rear LSD for my 97 2.5 GT 5 speed manual. Before I continue, I wanted to know about the factory LSDs found on some outbacks.

If I am not mistaken, the final drive on my car is 4.11
The final drive on a manual outback is 3.9
The final drive on an auto outback is 4.11

If this is correct, is it possible to put a rear LSD from an outback into my car?

Also what year outback diffs fit?

My 97 Outback has a 4.11 diff according to FSM that I acquired.

[StatGSR]

i didn't think any BG outback came with a LSD standard...

[chuckthefuk]

StarGSR is correct. Gen 2 USDM legacies never came with LSD. Gen 3 Outback w/ All Weather Package comes with a LSD but I am not sure about the Final Drive.

Search "KAG"s posts he has a nice write up about LSD and swapping carriers.

-Chuck

[TbirdMan]

What would be the best way to tell if an outback had the all weather package?

[mike-tracy]

What would be the best way to tell if an outback had the all weather package?

Giving the VIN to a dealer.

[StatGSR]

FYI.....

Model Year Model Trim Transmission Front Ratio Center Ratio Rear Ratio Rear VLSD
1991-1992 Legacy Turbo AWD 5MT 3.900 1.000 3.900 Yes
1992-1997 SVX AWD (R-180 VLSD?) 4EAT 3.545 N/A 3.545 Yes
1993-2001 Impreza 1.8L, 2.2L AWD 4EAT 4.111 N/A 4.111 No
1993-2001 Impreza 1.8L, 2.2L AWD 5MT 3.900 1.000 3.900 No
1998-1999 Impreza 2.5RS 4EAT 4.444 N/A 4.444 No
1998-1999 Impreza 2.5RS 5MT 4.111 1.000 4.111 No
2000-2001 Impreza 2.5RS 4EAT 4.444 N/A 4.444 Yes
2000-2001 Impreza 2.5RS 5MT 4.111 1.000 4.111 Yes
2002-2003 Impreza 2.5RS 4EAT 4.444 N/A 4.444 No
2002-2003 Impreza 2.5RS 5MT 4.111 1.000 4.111 No
2002-2003 Impreza TS, Outback Sport 4EAT 4.111 N/A 4.111 No
2002-2003 Impreza TS, Outback Sport 5MT 3.900 1.000 3.900 No
2002-2003 WRX 4EAT 4.111 N/A 4.111 Yes
2002-2003 WRX 5MT 3.900 1.100 3.545 Yes

Other North American Subaru models with VLSDs, either as standard equipment or available as an option:

* 2000-2002 Forester S (All Weather Package)
* 2003 Forester XS
* 2000 Legacy GT, Outback
* 2001-2003 Legacy (all)
* 2003 Baja

[TbirdMan]

What would be the best way to tell if an outback had the all weather package?

Giving the VIN to a dealer.
so there isn't a notation for it in the VIN or the plate in the engine bay?

[mike-tracy]

FYI.....

Of that list, I saw a couple of mistakes:
Only 91 Legacy Turbos got LSD rears "for sure" from the factory (it was an option 92-94),
and the SVX has a R160 (I know since I used the LSD from one)

Handy list, though.