Compatible rear differentials.

[pretzil]

Hey guys, looks like I am going to be picking up an evo9 diff on Sunday,

is there anything i should look for on final inspection?

Cracked bleed nipple will certainly be one thing.

 

[pretzil]

Do we use the diff wings from the evo or the vr4 when installing a s-ayc diff?

 

[naughtika]

I believe we use the same diff mounts, just that we need an extra 10mm spacer?

someone will confirm/correct me on this soon

 

[pretzil]

'Same' as which? ours or theirs?

 

[pretzil]

Which diff 'wings' do we use, the S-ayc ones or the ones originally on our cars?

 

[lathiat]

If by "wings", you mean the diff mounts bolted to the diff. Then you need to remove the evo ones, and put the vr4 ones on from your original diff.
The Evo ones are a different mounting/line-up.

 

[pretzil]

To strengthen the transfer case, you just need to upgrade the casing bolts to 10mm and torque correctly. So long as you check the bearings and replace as necessary, this is good for everything the standard engine can throw at it in RWD configuration.

Are these the bolts connecting the case to the gearbox, or or bolts only contacting the transfer case itself?

 

[6A13TT TYPE S]

the bolts which hold the two halves of the transfer case itself together.

 

[pretzil]

Cool, so I can pull off my spare tf case and have a crack this weekend. Do you need to replace any seals or just do them one at a time?

He says torque correctly... does he mean a set torque amount, or a pattern?

 

[pretzil]

Hi, um, I just pulled a bolt out of my spare transfer case and it's already M10... Are we sure about that number or has someone beat me to it?...

 

[6A13TT TYPE S]

The bolts that hold the two halves of the case together. Not the bolts that hold the tailshaft in.

 

[pretzil]

Evo 8-9 S-AYC Diff
Requires 10mm spacers on the rear mounts. Requires 4x4cm section cut out on the rear subframe for the YAW filler plug near the original filler hole.

Because everything is better with pictures, here is before and after for the fill hole from my efforts on the weekend

And there is a little 12mm allowance cast into the Evo diff casing that needs to be cut off to not foul on the VR4 subframe.

Wtf is an 'Allowance', can someone please point it out? I thought it would identify itself when I chucked the subframe over the diff, but it didn't???

Thanks.

 

[TME_Steve]

Never had to cut anything off before. Just the 10mm spacers

 

[6A13TT TYPE S]

Hi, um, I just pulled a bolt out of my spare transfer case and it's already M10... Are we sure about that number or has someone beat me to it?...

those bolts are the ones you upgrade from M8 to M10

 

[J_banger]

I hate being that thread revived, but anybody that's don't the Magna LSD conversion have pictures/specs for their 10mm spacers? I am getting a mate of mine to machine some solid spacers and I'm finding it confusing to know what bolts they go on

 

[AKKO]

@trotty may be able to assist from memory?

 

[pretzil]

Yo, I did the S-AYC which needed spacers also, according to the first post it is the same ones on the magna LSD, the rear ones. Yours will look different but be in the same spot.

 

[J_banger]

Yo, I did the S-AYC which needed spacers also, according to the first post it is the same ones on the magna LSD, the rear ones. Yours will look different but be in the same spot.

View attachment 44421

Thanks so much for the fast reply!
So the spacers themselves need to to 10mm of is the the bolt size?

 

[pretzil]

Yep.
A handy trick is to hold the spacer onto the diff by using a dab of super glue, that way you don't need to reach your hand up into the subframe to thread it on.

So do you want to see the abomination that is in my car?
Its that idea taken to the illogical conclusion Holding multiple little spacers onto one another!

 

[J_banger]

Yep.
A handy trick is to hold the spacer onto the diff by using a dab of super glue, that way you don't need to reach your hand up into the subframe to thread it on.

So do you want to see the abomination that is in my car?
Its that idea taken to the illogical conclusion Holding multiple little spacers onto one another!

View attachment 44424

View attachment 44425

Man that's all class right there