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R33 Diff Centre Into A31

RBceffy25
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RBceffy25 Rising Star

RBceffy25

Posted
Posted

As the title implies, is it possible to shim and fit 4.11:1 R33 gtst centre into my A31 Cefio housing?

And if so, would it be beneficial/worth doing?.

Car is to be used for street/daily driver only with around 260rwkw, RB25DET with VCT active.

Current ratio is factory RB20det 4.36:1 behind factory RB20DET 5 speed but plan to upgrade to R33 25det box and diff when i start upping the power.

Any advice would be highly appreciated!

Cheers!

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https://www.sau.com.au/forums/topic/327257-r33-diff-centre-into-a31/
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  • 1 year later...
Dan_J Veteran

Dan_J

Posted
Posted (edited)

just got around to installing mine, i'm unsure if the r33 LSD center will bolt in the a31/r32/s13 LSD housing.

if you have a complete r33 diff all you need is the rear backing place/cover that unbolts from your a31 LSD that you'll swap onto the r33 housing as all bolts line up and the r33 rubber mounts for the front.

also my rear half shafts were 6 bolt, where as the r33 is 5 bolt, you'll need s13/r32 5 bolt half shaft's if thats the case, and i would figure you would need a r33 diff with out ABS if your ceffy doesnt have it as i believe the tailshaft flange differs between ABS and non ABS

Edited by Dan_J

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