WRX Rear LSD

hydrowill · Post by **hydrowill** » Tue Oct 30, 2012 8:08 pm

Does anyone know weather all MY98 WRXs came out with a LSD.

Did the auto?

YouTube · Post by **El_Freddo** » Wed Oct 31, 2012 5:36 pm

I'm sure they all did. Why wouldn't they come out with one??

You can get any R160 LSD and swap them into the subaru housing you've got - keeping your diff ratio.

There's a thread on here that tells you how to do it. Pretty straight forward!

Cheers

Bennie

RSR 555 · Post by **RSR 555** » Thu Nov 01, 2012 10:02 am

Yep.. All Aussie delivered GC8 (Turboed Impreza code) came out with Viscous LSD. The early ones came with male shafts sticking out, whilst the later models required male spline shafts on the inner CV Joint.

This applies to auto and manuals but you have to remember they both have different ratios. What are you tying to do?

hydrowill · Post by **hydrowill** » Thu Nov 01, 2012 3:35 pm

Hoping to pick up an LSD for the outback. And swap the ratios as I have a spare 4:11 lying around.

hydrowill · Post by **hydrowill** » Thu Nov 01, 2012 5:28 pm

Could you link me to the thread bennie?
Although I'm sure it should be pretty straight forward when I have both of them sitting in front of me.

RSR 555 · Post by **RSR 555** » Fri Nov 02, 2012 9:54 am

You can buy a 4.11 LSD out of a imported WRX or do the swap like you're thinking, either way you'll need the 2 cv shafts for it, as they will be different to yours.

Venom · Post by **Venom** » Fri Nov 02, 2012 12:33 pm

I thought the early ones came with the female diff and male inner CVs.

hydrowill · Post by **hydrowill** » Fri Nov 02, 2012 8:52 pm

After doing some google imaging it does look like the gc8 diff has female holes to accept the c/v joints.

RSR 555 · Post by **RSR 555** » Fri Nov 02, 2012 11:03 pm

I has both types from the import GC8 rally cars.

From what I've found over the years is that after late 1994 they went over to the male splines on the CV joint/shafts but either way, you're going to need new inner joits as the VLSD has an extra spline on one of the joints and the clip/groove is in a different place on the other joint.

I'd just saying, when buying the LSD diff (what ever ratio you buy) make sure you get the correct cv shafts to match the diff. Crownwheel and pinions can be swapped but the shafts cannot. If you are swapping the CW & P, I'd recommend you replace bearings and crush tube.

hydrowill · Post by **hydrowill** » Sat Nov 03, 2012 8:03 am

Thanks for the advice man. Will save a big headache. As for the bearings I will keep this in mind.

How many KMS do the Viscous diffs last usually?

vincentvega · Post by **vincentvega** » Sat Nov 03, 2012 6:16 pm

mines done around 300K and still works as it always has: pretty crap but better than not having one

hydrowill · Post by **hydrowill** » Sat Nov 03, 2012 9:39 pm

Ok now I'm really quite confused.

Pulled a diff out of a WRX at the wreckers.

It came out of a WRX so you would assume LSD

Both shafts spin in the same direction as you would assume for an LSD

Was some slip when holding one wheel and turning the other as you would assume for an LSD.

However when I opened the back of the diff, there was no viscous center

looks like a normal open diff.

Does definitely not behave like an open diff. What have I got :s

Not welded.

I have seen somewhere someone saying about an open style LSD but thought it was bull@#*$ . Any Ideas?

YouTube · Post by **El_Freddo** » Sun Nov 04, 2012 1:28 pm

Got a photo for us to look at?? That'd be the best way to work this one out!

Cheers

Bennie

hydrowill · Post by **hydrowill** » Sun Nov 04, 2012 1:30 pm

Yeah I'll take one and put it up tonight. Really does just look like an open diff however. I'm stumped.

Post by **TOONGA** » Sun Nov 04, 2012 2:29 pm

It could be a torsen LSD. that would be a very lucky find.

TOONGA

hydrowill · Post by **hydrowill** » Sun Nov 04, 2012 3:22 pm

but wouldn't that still have an obvious center? This just looks like an open diff.

Post by **TOONGA** » Sun Nov 04, 2012 3:38 pm

we won't know what it is until pictures are posted

TOONGA

YouTube · Post by **El_Freddo** » Sun Nov 04, 2012 3:38 pm

hydrowill wrote:but wouldn't that still have an obvious center? This just looks like an open diff.

Just keep working on that pic!

Cheers

Bennie

Post by **TOONGA** » Sun Nov 04, 2012 4:05 pm

read this 3 pages of arguments on the same thing, a diff that's meant to be LSD but looks open.

He pulled it apart in the end and it had plates for the VC internally. o.O

anyone a NASIOC member that can see the pictures?

TOONGA

RSR 555 · Post by **RSR 555** » Sun Nov 04, 2012 4:11 pm

Sounds like a 'Hydratrak' diff. They work good but are a PITA on the wet stuff.

As for kms from your LSD, it depends on how its looked after service wise.