Hey there guys,
So i have an evo9 mr ,6 speed that's swapped to 5.

My center diff grenaded and i'm looking for a replacement .
Id like to hear if you guys have any experiences with certain ones , if there's anything for me to look out for that might not matchup

 

I think most of us would recommend the WaveTrac front diff

Im sure the Quaife is recommended as well (theres one for sale now in the Market Place)

 

I had the OEM RS diff for a few years. I never launched the car with it, but it performed really well on gravel and snow. I now have the Wavetrac diff and I love it. Only added it because I wanted a tougher diff so I can launch the car if needed. The Wavetrac seems to rotate the car easier, specially on gravel IMO.
I also launch the car repeatedly and its held up like a champ. No issues while daily driving it either, the car performs as it should.

 

You guys sure you're talking about the center diff and not the front diff?

AFAIK no one runs anything other than the factory center diff. The only people I know that make/made center diffs are Cusco and Quaife and IIRC the split on them is 35/65, might be wrong about that though.

 

heres only 2 diffs in our EvO (front & rear) (I mistakenly noted center diff in my first post)

AFAIK, there is no way to alter/adjust the front vs rear bias. Its permanently 50/50

 

We have 3 diffs. The front diff is in the tcase, the center diff is in the trans and the rear diff is in the rear end. The center diff controls the front/rear power split.

There are aftermarket center diffs. They are very uncommon and next to no one uses them. I've searched and there are a few posts on this forum about people who have used them but most of them are older posts.

 

Their is a center diff. It's in the trans. It's controlled. It's called the ACD.... Active CENTER Differential.

 

Youre right. Never quite thought of it as a diff. But there is no front to rear bias split. Its 50/50

 

The 03-04 has a VCU (viscous center diff) which is a pure mechanical system, the 05+ evos have ACD. The stock VCU has a 50/50 split but aftermarket units often have different splits. I believe the center unit Cusco used to offer had a 35/65 split. A car with ACD wouldn't benefit from an aftermarket center diff but the earlier cars might, depending on how it's setup.

 

You are right. Had to brush up on my understanding of the system. This is a good thread & confirms your notes on that Cusco diff
https://www.evolutionm.net/forums/ev...everybody.html

 

There is a spider Gear differential inside the transmission that the ACD controls. It is every bit as much a "diff" as the rear diff.

 

I assumed he meant the diff in the TC because that is the most common one to grenade lol

 

Yeah I was referring to the Diff in the Transmission .
I was more curious about your guys experience with an oem choice or Quaife

 

Shouldn't it be named like this
1. Front diff inside trans
2. Center Diff inside the tcase (ACD active center diff)
3. Rear diff in the rearend
This just seems logical to me Ive been wrong before though.

 

All the front diffs are in the T-Case (no diff in the Trans)