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Rb25 Gearset In Rb20 Gearbox

DUU MA
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DUU MA Contributor

DUU MA

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hey guys just wanting to know if you can put rb25 gearsets into an rb20 gearbox. as im doing an rb25 conversion into my 180sx and rb25box would require a modifed tailshaft as for rb20 boxes its a direct fit with as im told.

so just wondering if it can be done?

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WARDY32 Enthusiast

WARDY32

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My 32 makes 250kw atw and im running a rb20 box, second gear synchro is rooted and the box whines like an annoying girlfriend in the 1st 3 gears, it is driven everyday with a 5 puck sprung center clutch.

At least it will give you a bit of an idea what to expect, i have a spare 20 box here but ill be fitting up the 25 box very soon

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bubba Grand Master

bubba

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would a rb20 box be able to handle 230kw all day everyday??

street driving maybe with a soft clutch??

I killed one with 183rwkw RB20 and one with 183rwkw RB30 (2nd one went a lot faster with the RB30).

Could have been the button clutch and too many 2nd gear clutch drops though.. :bunny:

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bozodos Grand Master

bozodos

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Gee he must be gentle with it!

A mate managed to smash one in a HR 31 with a NICS RB20 with a R34 Turbo and Mines ECU! This wasn't from excessive thrashing either! :S

Mate 2 managed to smash one in a HR 31 Passage with a silvertop and GT2530 (don't know power figures for either, but not the best track record lol).

I'd be kinda wary of them myself.

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