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R33 Gtst Box Conversion To A31 (r32)

SirRacer
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SirRacer Experienced

SirRacer

Posted
Posted

Hey there, have got all the parts for my engine swap (rb30) into my cefiro and it should be built soon. Problem is i have a turbo rb20det gearbox but i dont think it has a chance of holding the power of the rb30.

The rb30 should be running with a gt3540r turbo and around 22psi so hopefully over 300kws atw.

I can get a gearbox (r33 gtst) from japan for a good price however arent to certain what bits id need to use to convert the car from auto to manual.

I had a parts skyline so have all the rb20 conversion parts from there however the r33 box has an electronic speedo, different tail shaft, different crossmember id presume, is a different length, and has a different arrangement of clutch (push vs pull, not sure what one).

Ive heard the clutch arrangement of the series 1 boxes is the same as the rb20det boxes however thats not confirmed.

Can anyone post up some info on what id need to modify and change to get this box going in my a31 cefiro(same an r32 skyline)

Cheers

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https://www.sau.com.au/forums/topic/121135-r33-gtst-box-conversion-to-a31-r32/
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dangerous_daveo Grand Master

dangerous_daveo

Posted
Posted

Dude do a search in the cefiro section. Make sure you open the seach up to all dates not just the 30days which it defaults too.

I've done it, its definately worth it. I did a big write up about it. Peace of mind. But if you cant sell the RB20 box just use it till it dies. Save your money.

Dunno about the auto to manual bit though.

brizzi Collaborator

brizzi

Posted
Posted

Hi there. I put a 25 box in my old r32. Bits you need are or need to do, re drill your cross member, you need a r32 gtr speedo drive,and you need to mod your tailshaft in length and change the yoke to a rb25 one they are heaps bigger! Changing from auto to manual you need a clutch master cylinder and clutch pedal and either change the brake pedal to the manual one or cot that one neatly and put a new rubber pad on it.Plus you will need a clutch line from master cylinder to slave cylinder, not sure bout computer but.

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