Its an entire unit, once again able to be found from simply looking at the picture. Insid ethe rear differential AYC unit, there is a differential and the AYC clutch packs. This is really quite simple stuff.

 

I'm guessing that the reason people stay away from active diffs on competition cars is that, aside from the rules preventing them in many series, electronic diffs have a slower reaction time and less predictability than their mechanical counterparts. They're complicated, expensive, difficult to set up correctly, and for a really good driver I don't think they add enough time to justify the extra weight.

For example, BMW spent years of development and many millions of dollars developing their E-differential (which uses the rear brakes as a substitute for differential clutch packs) and, in the words of one of my region's top autocrossers: "It sucks."

 

Once again, thank you, but get off your high horse. Ooh daaaamn you knew it was a separate unit. lol. No need to rub your experience into the face of a fellow enthusiast who didn't understand the meaning of a particular diagram.

Anyway, on topic..
Everything I've heard about this new rear diff sounds just great. Stock for stock and modded for modded, it seems like this diff will be able to help the IX keep up with the X in the corners!

Why aren't all awd/rwd sports cars fitted with rear lsds!

 

Don't know where in IL you stay at, but you are more than welcome to go for a ride with me to see how the TRE Maxx Lock works. I have zero experience with the other units, (Cusco etc. ), but I was able to achieve what I wanted, for A LOT cheaper.

My .02. GL

 

Im not on a high horse, but basic questions dont belong in a motorsports forum.


As for all awd sports cars being fitted with rear LSD's stock, most are, save some old subarus. USDM evos are as well, the TRE diff is an Upgrade

 

I'm with you on that. I'm assuming BMW did this (eliminate a mechanical diff) as a cost cutter - as I'm sure warranty repairs on their units were starting to become an issue when you add in the initial part and supply chain cost of adding a LSD to the cars.

Seems a shame, with BMW's reputation... but their sales in the last few years certainly havent' suffered for lack of an LSD.

 

I think you may need to clarify that statement a bit further. Offroad (rallies & hillclimbing), active diffs are where its at, though for the center diff. I don't think speed is much of an issue, but I could be wrong. The beauty of the active diff is you can program it to aggressively lock up in some situations and unlock in others. With a standard locking diff, you have to pick a 'best fit' setup that you won't be able to optimize for each throttle/steering angle/brake/e-brake/yaw angle like you can with the electronic ones.

Dave

 

back from the dead!!!


so your still running this i assume? stock ayc system just thinks its doing stuff and actually isn't basically? are you running the 2 way or 1.5?

 

Thanks for resurrecting this. Learned a lot.

For those of you interested in the technical details of the S-AYC (and other new technologies in the X), there's a great set of articles direct from the Mitsubishi engineers who developed it:

http://www.mitsubishi-motors.com/cor...f/2008/20e.pdf

 

the WRC FIA ruled out the AYC from the rally, being an "unfair advantage". It wasn't the Manufacturers neither the racers choice.
You can make the Active diff react faster and more precise , beside the instant adjust-ability to match with the road conditions.
Its a fact.

Rob

 

agree - that's what it's built to do - what it doesnt do is make the best drivers any faster. just makes it easier for all the other drivers to be just as quick. and that's for rallying - with all sorts of crazy different environments that the wheels experience.. way different from track, the advantage shrinks, especially with the amount of torque and grip some track cars run, way way harder on the diff than being in, for example, dirt or gravel

 

its true, but you have to remember there is no jump on track or even so that is more likelly is mostly lift .
The rally cars got tremendous torture because of the jumps. They run on tarmac too. And the unlimited rally cars are just as power full by TQ as the track cars. But they are heavier.
SO they AYC got its fair share from abusing the Diff's.
I know components it is great for track and cant hold up 20 miles in rally on tarmac . LOL

Rob