How do I stop my gearstick buzzing?

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I,m sure I am not alone in the buzzing gear stick thing, has anyone found the cause or a cure?
(It's definitely not the gear knob by the way).
S2 Gearbox. Ford Type 'N' (aka Type '9').

Jas.

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My gearstick buzz'z even when I remove the gearknob!

Jas.

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I'm about to restore my S2, and one of the jobs on the list is to get the gearbox rebuilt using close ratios with Quaife internals. I will talk to the company who will build it to see if they can find a reason for the buzz. If they find a solution, i'll post it up!

Jas.