Helical diffs

jf1sf5

jf1sf5

Forum Member
Joined
Aug 5, 2012
Messages
2,089
Location
Switzerland
Car Year
'97
Car Model
Forester
Transmission
Manual
I just finished installing my rear Quaife, not a very difficult job, had to grind a little to make it go into the casing. I drove a few kilometers and no whine, everything seems in good place :)

Now the real test will be off road this week end and in 10 days at the Valloire 4x4 festival :lildevil:
 
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Hope you have a very strong magnetic oil plug in there and full synthetic oil!

:)
 
No need to, only standard transmission oil :iconwink:
 
It will be interesting to see how a rear helical diff performs. It should be smoother than the plated one I have in the Forrie, and unless you lift a rear wheel or otherwise have (near) total loss of grip on a rear wheel, perform similarly.
 
dajeepman said:
Do they make them for rear diff for the us 3rd gen outbacks?
Click to expand...

No, but if its a r160 diff, you can find a '93-'99 rear diff and install the Quaife.

My Foz ('97) had the standard diff but I upgraded it with a '03 LSD. Now I'm back with my original diff that matches the Quaife.
 
Great stuff jf1sf5 :raz:

Looking forward to hearing how it performs when you're playing in the dirt mate :)

Regards
Mr Turbo
 
Couldn't wait, I went off-roading this afternoon, it works like hell :lildevil:

First test, diagonal spin upwards, well everyone knows that helical diffs hate that but I tried, well it didn't work...so I locked the DCCD, much better as long as 3 wheels are on the ground but then, with 2 wheels in the air ? I tried the left foot braking, it seems to work but I need to try harder, its quite difficult to go slowly up a hill with 2 wheels in the air and brake at the same time without the engine dying ! So I used the last method, the hand brake, 2 "clics", it just works awesome, the torque is sent to the wheel with the most grip, no need to rev the engine, its fantastic :)

I used my Gopro for the first time, I'll have to learn how to post a video.
 
Welcome to the world of grip! I know with my car the thing feels unstoppable. Good diffs can totally transform a car.
 
Do you have the standard center diff ? And if so does it "lock" enough when you have wheel spin, especially upwards ? Because with the plated Kaaz, you have no problem to find grip on the rear wheels but if the center diff is not "strong" enough, all the power will go to the front, and to the one in the air...
 
No problems at all thus far. I know you need to test these things in various conditions, but with both front and rear LSD's the load on the centre diff is less. I was thinking of installing an 11kg centre diff but this is no longer a priority (unless I can get one at a good price!). I have a DCCD in the WRX and I like how it works but I I am unsure if I would go this way in the Forrie. From your experience and mine it would seem that the order of priority is rear, front, centre. Would you agree? At least changing the centre diff is a lot easier than changing the front!
 
Yes Rally, I agree, this is the way I changed my diffs, first the rear LSD from an '03 Foz, then a front Quaife, then the center...and then the rear again for a serious one !

But I didn't expect so much better drivability with the center DCCD, its awesome !
 
jf1sf5, can you please tell us what model/year you got your DCCD from? I've heard several tales of woe of getting the wrong one & the output shaft(?) being the wrong size & we have the same model Foz....
 
I bought a whole gearbox TY752VB6EA from a V4 STI RA V-LIMITED '97. The DCCD housing is a direct bolt, but its easier to take the whole box off the car.
 
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