Slightly tweaked 3000GT TT

**stealthee** · 09-10-2019, 12:59 PM

My buddy has a 3s 6 speed diff in his AWD auto DSM.

**anyonebutme** · 09-10-2019, 08:36 PM

Kaaz makes a 3S rear diff, and when set up correctly is OK for street use. The come practically locked up factory with so much breakaway torque in case you wanna use it for drifting, lol.

The magic of the hybrid diff is it's not just a ATB diff, but it's an ATB gear diff with a small VCU in the center of it to prevent it from going full open when a wheel is on a slick surface like apex curbs or in the air. No other ATB gear diff I have ever come across is like that, not even the BMW E46 M3 diff, and it makes a difference. So even if another torsen is made I would put in a Kaaz before it because I could then tune it to my use and have a diff that can put down much more power mid turn.

**Unlogic** · 09-11-2019, 04:39 AM

Good summary anyonebutme!

The maintenance and adjustments required by clutch based LSD's along with the lack of "intelligence" is the reason why I spent years hunting down one a hybrid diffs. I wanted something as maintenance free as possible.

My friend has a Kaaz rear diff in his Skyline R32 and it's locking much rougher than my hybrid diff. His diff always locks even when there is very little torque applied for example when parking it likes to chew the tires quite a bit. My diff is much smoother even in those situations even thought it can chew tires too it seldom happens if I'm not applying torque or engine braking hard into a corner.

**anyonebutme** · 09-11-2019, 10:27 AM

Yea with the Kaaz the trick is to rearrange the clutches to deactivate about half of them, I'd personally would aim for 200-250 in lbs of breakaway but 150 would make it quiet even while parking. I gave up years ago trying to find the hybrid diff, and the one I did find the guy wanted 2K bucks for it without the axles, lol.

**Unlogic** · 09-12-2019, 02:51 AM

Yea not only are the hybrid diffs rare but many people forget to save the axles when the pull these diffs of the JDM cars which came with them. I really banged my head on that for a while before I managed to build my frankenstien axle.

**2fnloud** · 09-13-2019, 07:08 AM

So the axles for the hybrids are different than the regular rear diffs?

**Unlogic** · 09-13-2019, 07:25 AM

Yes, at least the right side is completely different from the one used in the standard visco diff.

**OldMadBrit** · 09-13-2019, 03:29 PM

I have just put a KAAZ diff in mine. The critical part is the break-in procedure. Mine went in at the same time as the new motor and AEM S2 ECU, so we ended up putting about 300 miles of dyno and street tuning miles miles on it. I made the mistake of thinking that it was therefore broken-in. It clanked, popped and banged its way through urban driving so bad that I thought it had broken a plate or three. Three point turns and parking lots were a nightmare.

So I called KAAZ directly and they were very helpful. They suggested doing their break-in procedure, which is 30 minutes of driving "figure 8's" making sure to free-wheel through every turn, only have power on in the straight parts. Then change the oil. KAAZ recommended Torco 85/140 (because I'm in California) + a bottle of Ford LSD friction modifier.

I did the figure 8's yesterday and made sure to do it for a good 40 minutes (man that gets old quick) then I changed the oil this morning - it was filthy, stank of molybdenum-disulphide and full of LSD clutch plate fines.

It has made a huge difference and I'm really pleased that I did this before pulling the diff. My KAAZ is silent in urban driving now. I can just barely feel it in very tight low speed maneuvering.