Cars with 4.11 rear diffs

[nikolaus.conrad]

I need a 4.11 rear diff for my Outback 5 speed swap, Which cars came with this ratio so I can keep an eye open at my yard? I pulled the transmission from a 99 Outback if this helps. Thanks!

[chuckthefuk]

http://spda-online.ca/modules/tinyconte ... tc_28.html (http://spda-online.ca/modules/tinycontent/rewrite/tc_28.html)

Look at the F.D. column..

car-parts.com can find it locally for you but if you want an upgrade you can source LGT 4.11 vLSD from a BL/BP or you can find the 00/01 2.5RS 4.11 with vLSD aswell.

If you don't care then:
96-99 5MT L-OB 4.11
97-99 5MT GT 4.11

I am sure the SUS and LSi have them also but I cant say for sure.

-Chuck

[nikolaus.conrad]

You Rock Chuck! Thank you!

[r3v_v3ng3]

Go with the 4.11 vlsd. Its sometimes the same price if not cheaper than the regular diff if you look around.

[nikolaus.conrad]

I'm looking for that vlsd as of right now :smt023

[Baddog]

Just dont use the VLSD if you plan on doing any sort of track. It will not last long.

Problem is I know of no Clutch Driven LSD's for the 4.11.

[DLC]

the GTs from 00-04 should have LSDs, same for most of the Outbacks of that period, and should be 4.11 with a 5MT. Might be 4.44 with the 4EAT.

I've never heard of a VLSD being "worn out" on the track.

[Baddog]

^ They are VLSD's.

And I have read many of times they burn up. Just the design. Talked to 2 shops here that have both said the same thing. VLSD is not bad if youre not abusing it. Also that the VLSD fluid is not able to be changed. Its closed up separately from the other fluid.

[nikolaus.conrad]

My email didn't notify me of your posts lol

I really don't plan to abuse my car, maybe an SCCA solo here or there and donuts in the snow but that's about it.

[nikolaus.conrad]

I've been thinking, I have a manual transmission from my parts car with a 3.9 final ratio.
(I don't want to use this transmission because it has 192k on it and all the syncros are shot, and the 99 Outback transmission is brand new)

How hard would it be to crack open the transmissions and swap front diffs? Or should I not even think about such an operation? lol

Edit: The 3.9 and the 4.11 are open diffs but it really doesn't matter to me. A LSD would be nice to have but I really don't need one.

[chuckthefuk]

its much easier to swap ring and pinion from 4.11 to 3.90 diff's

[nikolaus.conrad]

I'm not sure if I follow? I'd like to take out the 4.11 front diff in the 99 transmission and put in the 3.9. I'd like to do this because:

1. I'm trying to drop my RPMs for highway cruising and I'm just realizing how difficult this is for Scoobs. They like to sit around 3k at 70mph :smt012 Which I think is pretty high.

2. I'm on a student budget and I'd like to save as much as I can, I don't want to spend money on a new setup if I can build a setup with parts I already have.

I'm up for a challenge, I'm just wondering how much of a challenge it will be. I'm already in the process of building a transmission for my Spitfire (4 speed with Overdrive) so gears, syncros, meshing, and linkage isn't foreign territory to me.

[chuckthefuk]

Nick you bought a Outback. its a 4.11 with a different 5th gear then the regular 4.11

Your 5MT was designed to tow things..

Its not difficult for Subaru to run lower rpms.

I have no input in switching front diff's I can tell you it is not easy.

For the hassle just find a 3.90 5MT from a 97-99 without cable clutch.

-Chuck

[nikolaus.conrad]

I can't even believe I didn't see that, I didn't even realize it until you pointed that out. Thanks Chuck!

[chuckthefuk]

live and learn

[elislider]

the only MLSD 4.11/4.44 rear diffs are JDM ones from 92-99 Impreza WRX/STi models. the earlier ones use different L vs R axles, and the right axle is super rare, so dont break it. the later ones for phase 2 use the same axles as the USDM 98+ models

[Baddog]

I plan on running a 96 OB trans with a Frakenmotor. Should be a pretty nice setup with the gearing for that motor.

[nikolaus.conrad]

What's different with the 96 OB trans from the rest? Is it just the gearing?

[mike-tracy]

I'd have to refer you to the FSM's, but the 5MT 96 Outback was paired with an ej22 and cable clutch. No idea on the FD or whether 5th is tall or not.

[chuckthefuk]

4.11 with a tall 5th.. And yes cable clutch.. not that it really makes a difference since you can still re-use your old slave and hydro-hybrid setup.

-Chuck

[nikolaus.conrad]

Baddog isn't your transmission an auto?

[96LegacyWagon]

http://spda-online.ca/modules/tinycontent/rewrite/tc_28.html

Look at the F.D. column..

car-parts.com can find it locally for you but if you want an upgrade you can source LGT 4.11 vLSD from a BL/BP or you can find the 00/01 2.5RS 4.11 with vLSD aswell.

If you don't care then:
96-99 5MT L-OB 4.11
97-99 5MT GT 4.11

I am sure the SUS and LSi have them also but I cant say for sure.

-Chuck

For an automatic, will these numbers help me learn anything about my car?

[nikolaus.conrad]

Not really since everything is manual on that site, I've been wondering the ratios for the 4EAT for sometime.

Chuck, do you know what the ratio is of the differentials on an Automatic Outback?

[chuckthefuk]

4.444

[elislider]

4eat:
4.44 for the GT/outback and 2.5RS... (mostly LSD too)
4.11 for the L (2nd gen)

[96LegacyWagon]

4eat:
4.44 for the GT/outback and 2.5RS... (mostly LSD too)
4.11 for the L (2nd gen)

Thank you, I still don't know what it does, but in case I need to find replacements the number 4.11 will now be stuck in my brain. :)

[Baddog]

Baddog isn't your transmission an auto?

Yes it is. I would be doing an 96 OB 5 speed swap.

[Benfolio]

My L was 4EAT equipped, 4.11 FD.
Swapped in my BD GT's 4.11 5MT (which was rattly and junk when I got it, its just more so now) and will soon be swapping in a 5MT out of a '97 Outback with only 77k on it. Higher 5th gear don't bother me much with my taller tires.

[elislider]

My L was 4EAT equipped, 4.11 FD.
Swapped in my BD GT's 4.11 5MT (which was rattly and junk when I got it, its just more so now) and will soon be swapping in a 5MT out of a '97 Outback with only 77k on it. Higher 5th gear don't bother me much with my taller tires.
your speedo will be off a bit, since the outback has larger tires than the L/GT

[Benfolio]

My L was 4EAT equipped, 4.11 FD.
Swapped in my BD GT's 4.11 5MT (which was rattly and junk when I got it, its just more so now) and will soon be swapping in a 5MT out of a '97 Outback with only 77k on it. Higher 5th gear don't bother me much with my taller tires.
your speedo will be off a bit, since the outback has larger tires than the L/GT

I got 26" tires on it now, so it already reads 11% slow. Got my trans in and it's a '95/'96 cable clutch anyways, so it should have the same 5th as what I got now.