Hey guys. I need some clarification. There's a little debate going on (on a different car forum) about the drivetrain config of the current Evo.

Here's what the manufacturer's website reads:

Regarding the front diff: Is it a torque-biasing or a limited-slip type? It can't be both. If there are helical gears and it's torque-biasing (as the site reads), then there's nothing to "slip."

However, the rear diff indicates that it is a 1.5-way setup. Is this a viscous or clutch-pack style diff?

Thanks for any info.

 

Bump.

 

rear is viscous

 

Can you change the rear diff to some aftermarket one?

 

Yes, Cusco sells differential upgrades for the Evo. If you thought multi-plate clutches were expensive, "you ain't seen nothin yet!" I believe Kaaz also sells diff upgrades but I'm not positive.

- Steve

 

Its only the front that isn't a drop in and cant be upgraded by any other company besides quaife?

 

Thanks for the bit of info, guys.

So from what I gather, the front is a torque-biasing differential and the rear is a viscous limited-slip differential.

 

On the 03 and 04's yes, but on the 05+ with the ACD TC and FLSD they can be upgraded.

- Steve

 

so the front can be upgraded to any JDM aftermarket LSD (correct me if im wrong). As for the rear can they be upgraded as well, to an aftermarket LSD?

 

On an 05+ yes

 

I thought pretty much any front diff from evo4-8 would basically interchange. The T-cases might be a little different but the actual diff could be swapped. ie: a helical RS diff from a 7 would fit a US 2003 8 or any of the ralliart cluth front diffs as well.