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260z/Skyline gearbox question


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#1 BikerWill

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Posted 28 January 2014 - 01:04 PM

Hi guys,

I'm looking at a 260z that has been fitted with an L28 and a 5 speed Skyline box (with a custom made tailshaft). The owner did not do the mod so he cant tell which model skyline it came from, just that it is longer than a z box. I have no idea of the diff ratio either, but it was being prepared as a tarmac rally car before the owner lost interest.

Anything I should know/worry about this gearbox?

Thanks

Will

#2 d3c0y

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Posted 28 January 2014 - 01:25 PM

It's probably an RB20 gearbox. It's a pretty common thing to do to get a stronger box.
You just swap the bell housing from the zed box onto the skyline box. If you have a look in the gearbox sticky it talks about what's involved.

#3 BikerWill

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Posted 28 January 2014 - 01:43 PM

Thanks mate :)

#4 dat2kman

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Posted 28 January 2014 - 05:27 PM

Rb20 box is same length as stock box.
Does not need custom tailshaft made!

It'll either be a rb30 box from a VL commodore, or a Sylvia box, these are 50mm longer, and just require tailshaft shortening.

#5 pauly_adams

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Posted 28 January 2014 - 07:04 PM

last vl box I measured was the same as a z box also, silvia and r33 are longer however 




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