I want to know if I can put an evo x differential on my evo 6, I have seen several images and they are the same.

 

Same except left output flange. You can check if you can swap the output flange from Evo 5-9 AYC to Evo X AYC diff.

The Evo 7+ Super AYC to Evo 9 is same as Evo X otherwise, no advantage except age: newer, so fresher.
Evo 6 and early 7 AYC was not as "much torque transfer" as later Super AYC..maybe 50% more torque transfer, so more rotation.
And Super AYC may be physically stronger, do not remember any more.

 

I have a few questions on this swap. I wanted to buy a spare rear ayc diff for my EVO V since parts are getting hard to find. I though on geting a EVO X ayc diff (stronger and better at torque bias than the evo V or v AYC) since I have a machine shop I think most machining mods would be relatively easy.
My questions in in regards to final drive ratios.
According to my research the EVO 4 to 9 have a 3,307 rear diff ratio but the X has a 3,538. From what I know for 4wd vehicles it would mean the rear wheels would spin slower around 6,6% than the fronts. Some people say that this wouldn't matter as the center diff would account for this discrepancy and allow this mismatch. I worked for BMW technical service and just a 1% tire size difference (using older and newer tires) could cause issues with the diffs.
I don't know if you could just swap the differential gear set from the evo v to the evo X AYC. Is this possible? Since most people say the AYC is almost identical except for the left output flange I would think internally they would be very similar. Also from pictures the inner diff seems to be very similar in dimensions.

Thanks for all the help.

 

Thank you so much for the information.


 

I am glad to hear that.