I was looking at the Quaife America ATB Differential Application List.

http://www.quaifeamerica.com/

They apparently offer a "Lancer Evolution 8.5 MR Center" ATB differential.

Anyone know anything about this?

I wonder what 8.5 means? Maybe for ACD vehicles only?

And why the MR designation? I know the MR has a different transmission, but I assume the transfer case would be the same as on the non-MR models.

geo

 

yes it works great. I have one installed.

click here to find out more

 

For some reason the link won't take me there.

Just to make certain there is no confusion, I'm asking about the Quaife center differential and not the Quaife front differential.

Can you please confirm that you have a Quaife center diff?

If so, do you know which one you have?

There are two different versions listed:

Lancer Evolution 5 / 6 / 7 Center

Lancer Evolution 8.5 MR Center

Based on the way they are listed in the Quaife application chart I am guessing that MAYBE the "5/6/7" center diffs are for VCU transfer cases and that MAYBE the "8.5 MR" center diffs are for ACD transfer cases. However, that is only a guess and may not be correct since the Evo 7 did come with an ACD transfer case (which the USDM did not see until the 2005 Evo 8).

geo

 

so does the american market no get the Active centre diff like the uk/japan gets?????

Chris

 

2003-2004 USDM has VCU

2005-on USDM has ACD

geo

 

SOrry don't have the center diff , I thought you were looking for the front.

anyhow, I would contact RRE and see if they can provide any details. They initiated the push for the front LSD for the '03-04 EVO.

 

Chris, i have the quaiffe front diff that i have yet to install. could u give me description of the differance it made. did it increase front grip (under power) to the point where you actually get power-on oversteer? I have heard many people say the diff is great but nobody goes into detail....thanks

 

No more tire smoking when you get on the gas while exiting a tight turn. The front wheels actually help pull the car through the turn. You can also get on the gas earlier through turns. The most noticeable difference was being able to kick the tail out when gassing it on turn exits.

The ralliart LSD seems like a much more economical alternative to the quaife now. If the current price was available back when I bought my quaife, I probably would have gotten the ralliart instead.

 

I have the Quaife in my 03. You will experience less wheel spin when exiting a corner but DEFINITELY not power oversteer. The car will still push if you apply power too soon or too violent.

 

-thanks! that kind of feedback really motivates to finally install the thing....

 

Better to pull this thread frmo the dead than post a new one. Guys I have a Quaife QDH11B centre diff lying on the floor but I'm having second thoughts about installing it. This IS the actual centre (i.e. the one inside the gearbox that splits torque front to rear). I have only had one person's expeience with this diff on an EVO 6 and he says he could not make out ANY difference. I'd hate to go to the trouble of pulling the gearbox apart and then ending up seconding that experience.

Theortically a centre torsen would maximise traction before the viscous kicks in and locks the centre. But theory and practice can be different. I worry that the torsen will make the car more understeery, especially as the quaife is not a 40-60 like the cusco or GSC diffs, but simply a torsen instead of an open diff.

Thanks in advance for any real-world experiences.

 

I have one of these but haven't fitted it yet. You may be right about the behaviour before the viscous locks but once it does you'll have a 50/50 split the Quaife and and it'll behave in the same manner as the standard open diff (hence the advice you've had). To get the benefit from torque biassing, you'll need to remove the VCU.

I am considering doing this by fitting a plated LSD at the front that replaces the VCU and standard diff pack.

Cheers,

Simon

 

I think the 8.5MR is for 6speed trans MR evos... The center diff is in the trans and the 6speed is the only different trans.. As far as front diff which is in the tcase they are all the same 7,8,9....

MIke

 

this is spot on.

the Cusco, GSC, and the Quaife are all the same helical design. if you keep the front diff as an open unit it wont do much(as the evo 6 car had). install a 1 way front plate style diff and its on like donkey kong.

Mike the 8.5 MR is for the 6spd cars as you stated. the trans housing is different on the 5spd and 6spd trans, so this one is for the 6spd only. they also make one for the 5spd as well.

as far as our diff goes we made a run of 10 units a couple of years ago and do to the costs of running another batch and the headache of dealing with out sourced manufacturing we have elected not to run another batch. we would rather just sell the Quaife unit than deal with trying to make them again, we sell camshafts and crank shafts and want to stick with what we do best. i would highly recommend the Quaife over the Cusco as when i had a look at the cusco there were issues with the gearing and the hardness of the gears inside the unit.

On a side note we have one of the quaife 5spd centre diffs on the shelf if anyone wants one .

 

Greg, PM me your best price shipped to 80910 on the Quaife front diff for an Evo8 GSR. Thanks.

Aaron