EVO 8 DIFF fitted & working

[Kryton]

So before I buy more stuff I don't actually need, can someone confirm ALL evo 8 GSR diffs are S-ayc & all I need is the diff itself & spacers to fit. No shafts, ecus, pumps, sub frames etc required?

[Gly]

its either S-ayc or LSD.

diff + 10mm spacers,

and the pinion flange from a vr4 diff needs to be put on the evo diff

[Kryton]

its either S-ayc or LSD

Ok, so how can I tell? The bloke selling it is going to email a picture later. Are both types filled from the top?

Am I right thinking GSR should be sayc unless rs diff has been retro fitted?

[roryfromnz]

Sorry to bring this back up, but im abit lost as in this thread it says evo 7 onwards have the SAYC Diff. Is this the case? Or is the evo 8-X diff SAYC and Evo 4-7 standard AYC ? I have an Evo 7 diff i plan on fitting soon. Cheers

[CANDEE]

it should be evo 4-7 with the AYC and then evo 8-9 with the S-AYC...

Looks like the 7 has the std ayc then.

[Nick Mann]

The Evo 7 is standard AYC but it does have the meatier crown/pinion used on the SAYC models. It should be stronger than the standard unit. Also it's worth mentioning again that the Evo X SAYC unit is not as easy to fit as the 8/9.

[roryfromnz]

Awesome, so a great spare for when i destroy my current AYC unit. cheers guys! :-)

[Mr.Salas]

the fitment of the evo X diff. is easy, but the problem sits at the axles fitment.

[Davezj]

OK DUdessssss........ It is confirmed that EVO 10 rear S-AYC Differential fits our cars(Legnum, Galant VR-4). It fits like it was made for hehe.


OK, problems

EVO 10 uses a bigger diameter axles shaft meaning that you would need to change the HUB carrier for a evo 10 one or just make the splines diameter smaller to fit into stock CV joints, this is what I did. This was done for the passenger side axle.

The axles of a evo 10 are the same length as ours, but they are thicker.

I know this post is an old one but it is the correct place to ask. @Mr.Salas a quiestion as he seems to be the only person that has fitted a evo 10 diff into a vr4.
Did you try just swapping the inner cup on the from evo drive shaft to see if the roller bearing spider from the VR4 drive shaft will fit inside the evo 10 cup that goes into the diff?
by how much did you make the splines smaller on the hub end of the evo 10 drive shaft, to make it fit the CV joint, i am ssuming you mean the out end of the drive shaft.

any help will be greatly appreciated.

[Mr.Salas]

Hi Davezj,

What we did was: Remove the CV joint (Spider bearings) from the outer axle shaft (HUB side) of both VR4 shaft and EvoX shaft.
Then we had to send the shaft (EVOX) to be re-splined at a machine shop for the smaller diameter roller bearing spider of the VR4 CV joint cup too fit.
That is the only thing you have to do for both side.

I know this post is an old one but it is the correct place to ask. @Mr.Salas a quiestion as he seems to be the only person that has fitted a evo 10 diff into a vr4.
Did you try just swapping the inner cup on the from evo drive shaft to see if the roller bearing spider from the VR4 drive shaft will fit inside the evo 10 cup that goes into the diff?
by how much did you make the splines smaller on the hub end of the evo 10 drive shaft, to make it fit the CV joint, i am ssuming you mean the out end of the drive shaft.

any help will be greatly appreciated.

[Mr.Salas]

Hi Davezj,

What we did was: Remove the CV joint (Spider bearings) from the outer axle shaft (HUB side) of both VR4 shaft and EvoX shaft.
Then we had to send the shaft (EVOX) to be re-splined at a machine shop for the smaller diameter roller bearing spider of the VR4 CV joint cup too fit.
That is the only thing you have to do for both side.

I know this post is an old one but it is the correct place to ask. @Mr.Salas a quiestion as he seems to be the only person that has fitted a evo 10 diff into a vr4.
Did you try just swapping the inner cup on the from evo drive shaft to see if the roller bearing spider from the VR4 drive shaft will fit inside the evo 10 cup that goes into the diff?
by how much did you make the splines smaller on the hub end of the evo 10 drive shaft, to make it fit the CV joint, i am ssuming you mean the out end of the drive shaft.

any help will be greatly appreciated.

[Davezj]

Hi Davezj,

What we did was: Remove the CV joint (Spider bearings) from the outer axle shaft (HUB side) of both VR4 shaft and EvoX shaft.
Then we had to send the shaft (EVOX) to be re-splined at a machine shop for the smaller diameter roller bearing spider of the VR4 CV joint cup too fit.
That is the only thing you have to do for both side.

Thanks for the reply, much appreciated.