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Im after a different diff ratio for my R33 GTS-T. I currently have a 4.1 ratio 2 way diff. I want something with a taller ratio like a 3.7. I have a C4 box and it revs a bit high on the highway so want something else for the street.

What other ratios can you get for a 33??? Or what can I use to have a diff made??

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https://www.sau.com.au/forums/topic/235000-diff-ratios-for-a-r33/
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just go to a diff joint man and ask them to change the internals in your diff.... i dont understand why you would wanna change to 3.7s in the ass... your car will go nowhere till about 80k then youll be setting land speed records. lol.

  • 3 months later...

stolen from another forum :thumbsup: , just incase someone is searcing like i was :D ::::

4.900 - C23 Serena SR20DE 4WD Auto

4.636 - C23 Serena SR20DE 4WD Manual, C23 CD20T 4WD

4.375 - R32 RB20DET 4WD, A31 Cerfiro RB20DET 4WD

4.363 - R34 RB25DE 4WD, R34 RB25DE Manual, R34 RB20E, R33 RB25DE 4WD, R33 RB25DET Auto, R33 RB25DE, R32 RB20DET, R32 RB20E,

C35 Laurel RB25DE 4WD Auto, C34 Laurel RB25DE 4WD Auto, C34 Laurel RB25DE Auto, C33 Laurel RB20DE Manual

A31 Cerfiro RB20DET, A31 Cerfiro RB20DE Manual, S13 CA18DET, S13 CA18DE, C23 Serena SR20DE 2WD, C23 Serena CD20T 2WD

4.111 - R34 RB25DET Auto, R33 RB25DET Manual, C35 Laurel RB25DET Auto, C35 Laurel RB20DE Auto, C34 Laurel RB25DET Auto, C34 Laurel RB20DE Auto,

S13 SR20DE (ABS),

4.083 - R34 RB25DE Auto, R33 RB20E, R32 RB20E (ABS), C33 Laurel RB20DE Auto, A31 Cerfiro RB20DE Auto,

S15 SR20DE, S14 SR20DET Manual, S14 SR20DE Manual, S13 SR20DET Manual, S13 SR20DE (ABS), S13 SR20DE

3.916 - S13 SR20DET Auto, S14 SR20DET Auto, S15 SR20DET Auto, A31 Cerfiro RB20E. 5 & 6 bolt

3.692 - S14 SR20DET ADM Manual, S15 SR20DET Manual. 5 & 6 bolt

3.583 - R33 RB25DE Auto, C33 Laurel RB20E Auto

* transmissions as stated, if not listed it means they are available in either Manual or Auto.

If anyone can add to this list, either if its ratio or cars that we can find the diffs in.

Are any of these diff gears compatible with a R33 GTST non abs diff?

S13 SR20DET Auto, S14 SR20DET Auto, S15 SR20DET Auto, A31 Cerfiro RB20E. 5 & 6 bolt

Do any of these diffs have the same diff hsg as the R33 GTST diff? ( R200 i think)

Cheers,

Ryan

  • 2 months later...

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