Definitely update us know when you experience it a bit more. I thought of going with the Diaqueen originally, but have talked to my friends and they all tell me that even though I have a daily driver, I always talk about performance with my Evo and how I can constantly be improving it. So why skimp out on performance now just for the noise?

So unless it's really really really REALLY REALLY REALLY REALLY REEEEAAAAAAALLLLLLLYYYYY FREAKIN ANNOYING (and if it is, please let me know), I'm just gonna deal with the Redline chatter that comes with the advertised stronger lock up. Unless of course the difference in the two oils are marginal and I wouldn't be able to tell the difference because the performance with the friction modifier is comparable. Anybody have experience with both oils?

 

It is really annoying! I run amsoil which is too thin and it got way too loud for me and I don't care about noise too much but people driving behind me can hear it. I added friction modifier and it went away. The car even drives smoother now but I know come autox events it wont perform as needed so I was just going to throw some redline in there.

 

Is this JUST a DD or do you do track/autox?

I would think it would be hard to notice a difference in street driving. But it's just a little annoying, not REALLY REALLY annoying.

 

It's my DD with a handful of track days a year. I drive on windy roads all the time and I love cornering hard. Last night I found myself taking my car 8/10ths on a normal drive from my friend's house. I practice a lot of racing on Forza and Gran Turismo 5 and after driving many rear wheel drive cars with the steering wheel, I can't wait to get this new and improved rear differential. I'm the type that probably would notice a difference and according to Dangle, the noise is really annoying. Hmmm....perhaps I should just go with the Diaqueen then.

 

I run Redline NS (No Slip) with the Weir 12-plate setup. Is it loud, VERY. People in the paddock think my diff is broke. But I love the heavy lockup and the ability to rotate the car on throttle. For track usage, I would want no less lockup.

 

The Japanese RS evos had the plates stacked the same way as your guys ones, remember, who wants to buy a car that makes horrible clunking noises, the average person would freak.

 

i was fairly certain the jdm evo rs's have a different 1.5 way mechanical diff, the "rs diff" and that was different from the USDM evo diffs. The USDM diffs are definitely an old one way that was converted from like an evo 3

 

I may have open mine up and look into this on my TME to confirm, it's about time for a fluid change anyway.

 

i've no idea outside of everything from 8/9s

 

OK, so, 8/10ths on the street is not a fantastic idea, just to get that out there. No matter how much Forza you have played on your game console. You really need to be using the throttle a lot at corner exit to notice the difference. In other words, by the time you notice the difference, you are already going to be going pretty fast, and if you are not on a closed course, you might be unpleasantly surprised. Like into a tree or something.

I never ran it with Diaqueen just because Andrewtech was doing the diff swap and they are a Subaru shop that doesn't keep Diaqueen on hand. So Redline was easier. But it was totally silent with the regular stuff, and even without the NS fluid it made a really noticeable difference.

If I were you, I'd do the swap, do the Diaqueen or some similar Redline, and see how you like it. Diff fluid is cheap too, so you could always run with friction modifiers most of the year, and then put the NS stuff in for the summer when you're doing more track stuff.

 

I may not be the first one to say this, but could the MANUAL be incorrect, not the assembly??

 

Hmmm, you're the first one here to say that the Redline fluid was totally silent. You are lucky! I think I'm going to go with the Diaqueen because it already comes with the friction modifiers, and then on track days I'll swap it out with the Redline to see if I'll notice a difference. :-) That's the time to experiment with driving the car harder.

I agree, driving 8/10ths on the street isn't recommendable, however, after midnight when there's no one on the road, that's the time to do it--not during the day when anyone could be there. I believe in safety measures, hence the reason I didn't take it 10/10th's--I'll save that for the track. I mean, I did buy the car to drive it the way it's supposed to be driven (which I LOVE!!!), not to just look cool in it. And I love the feeling of my chassis twisting and my 26mm front sway bar working hard. Heheheh! Iz all good!!

 

Then take it to a real race track...

 

so happy I stumbled onto this!

 

bump