Series 2A Gearbox Change

[blz6662]

Hi All,

I currently have a Series 2A SWB with Suffix F Gearbox/Fairey Overdrive combo mated to a Steve Parker conversion Essex 3.0 V6 which is great. Now the gearbox is getting a bit tired and I have a good Series 3 Gearbox on the shelf (bottom shelf!) and I have read that it is possible to swap the Series 2A Bellhousing directly onto the Series 3 box without any issues. Can't find anyone with a good answer on any forums and I apologise if it's here somewhere.

Can anyone give me some true guidance on this please?

Kind regards

Baden

[Snagger]

You may need to check the bearing part numbers for each box, but I believe they are the same.  The casings will certainly fit - it’s just whether the SIII innards will foul the SII bell housing rear face.  I think the lay shaft will be fine.  I’m not so sure about the primary pinion, which may differ for the clutch.  The SII pinion might mesh with the SIII lay shaft, but I’d expect it to howl unless you can for the SII lay shaft front gear to the SIII lay shaft.  I don’t know if they are dimensionally similar at their splines.

[Anderzander]

I’ve been told by the chap at GLF that you can put a S3 box onto an early S2a bell housing.  He offered me a S3 with the synchro gears mated to the S2a mechanical clutch bell housing. So it must be possible 👍🏻

[rusty_wingnut]

Yep it is, I've got a really late S3 box setup like that behind the 300tdi in the 107"

[Anderzander]

1 hour ago, rusty_wingnut said:

Yep it is, I've got a really late S3 box setup like that behind the 300tdi in the 107"

[Anderzander]

1 hour ago, rusty_wingnut said:

I've got a really late S3 box setup like that behind the 300tdi in the 107"

I think it was a good choice 

[blz6662]

Thanks guys, I go for combo then when I start the upgrade.

Kind regards

Baden

[Daan]

Why not fit the series 3 box as is?