Hi Claudius,
Is the helical front diff for the VII RS a good unit? Is it made by Mitsu? I'm asking because I think it might fit the VIII.
Cheers,

 

In case he doesn't see this thread, you may want to PM him, then post his reply so we can all see it. Not that I'm trying to be snoopy or anything.

 

I have been doing some research here trying to find out if an EVO VII RS front LSD would fit also. There is a viscous LSD on e-bay and I contacted the seller in Japan. After numerous exchanges he was able to verify that the EVO VII RS front LSD will wirh with our US EVO so long as it is was designed for an EVO VII RS without the optional ACD. Seller also reported that the OEM front LSD is only available as a viscous unit. Helix units are aftermarket or sourced from Ralliart. Claudius informed me that he is running a Ralliart 1.5 hellix unit in his car and recommended that I not bother with an OEM viscous unit due to requirement for slip to occur before transferring the torque. This will not help minimize the understeer I am trying to eliminate. I am trying to find out if an ATB unit is available from Quaife. They only list products for AWD and FWD Eclipse models. I am not sure about compatibility between these drivelines and the US EVO.

 

Interesting,
All my research suggests that the VII RS factory diff was a helical unit. I'm not certain the E-bay seller knows exactly what he has. I am not aware of a plate-type diff ever being standard on the VII RS.
Cheers,

 

Claudius,

Does your Evo have the same center "viscous coupler" as the USDM Evo? If it's good enough for you, it's good enough for me