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Minimum Synchro Clearance etc. etc. etc.

Despite installing a long throw slave, the correct clutch adjustment, fluid changes etc. up shifting into second and third is accompanied by a clunk. Also there is a pronounced whine under acceleration and deceleration in all gears. So because I have not worked enough on this bloody car in the past 12 months since I've owned it I thought I would pull the ZF (Again) for closer inspection.

So I checked the clearance on the Synchros and not a one of them is above .30 when I would have thought at least 4th and 5th would be ok.

So what is the minimum synchro clearance? Is it possible that they are all worn out? (God help me!)

Is the whine like I figure a pinion/ring gear lash adjustment? If it is how do I adjust it?

Where can I get replacement parts (and rebuild manual) from reliably and quickly? I tried to call RBT quite a few times last week on various days at various times but only got the answering machine. Being in Australia I did not leave a message.

I am in over my head but where I am in the world I really have no choice but to bite the bullet and do it myself so any help would be appreciated.

Here is a pic of what I think is the 5th gear synchro clearance, doesn't look like much does it?

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