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fubar

How To Tell If U Have A Rb25 Or Rb20 Manual Gearbox

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Hey all

I've got a r32 with a rb25det neo and its used for driftin

Not sure what gearbox is atteched but it has taken a beating and has finally failed

I've got some numbers of it RP71C #1 if that helps

Can someone help me to tell the difference between the 2 gearboxes

Cheers

Daniel

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Judging by the writing on the side that sounds like an RB20DET gearbox to me.

The most noticeable difference is in the size of the thing, but yeah, google images.

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Look at the slave cylinder.

If the slave cylinder is on the engine side of the throwout fork, then it is RB20 or R33 RB25. Then check where the bolts are. Bolts for slave cylinder on same side of slave cylinder is RB25 gearbox, bolts on opposite sides from each other on the slave cylinder is RB20. If the slave cylinder pushes from the rear of the box forward, then it's the Neo RB25 box and you have the pull type clutch

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  • Topic Author
  • Thanks heaps for that info guys:)

    i'll jack the car up tomorow and check it out

    Cheers

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    Yes RP71 (whatever) indicates non turbo rb20/rb25 box. RB25det box is a good 20kgs heavier and wider.

    RB25vsRB20.jpg

    Edited by R31 POWER

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  • Topic Author
  • Yes RP71 (whatever) indicates non turbo rb20/rb25 box. RB25det box is a good 20kgs heavier and wider.

    RB25vsRB20.jpg

    Cheers man thats heaps of difference i deff got a pissy gearbox:(

    Edited by fubar

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    yes i know i'm posting in a year old thread, let it be.....

    had my car on a hoist yesterday to check a couple of things and discovered my g/box has a little kangaroo stamped under the RP71C #1 code.

    is this a common thing for these g/boxes?

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    wouldent think so... i have seen a few sr20 main cap gurdle's with a kangaroo stamped on it .....

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    i just found it really strange for a jdm car to have such a thing stamped on the casing.

    unless the box was changed at compliance? far fetched, i know.

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