Gear lever vibration type 9

[Smithaam 9]

Really stupid question but as title says, my gear leaver has a vibration on my type 9 V6 gearbox. is there like a nylon washer or something that sits under the leaver? if so whats it called?? trying to search but can not find what people call it or if my gearbox has one!

cheers

[dgo 80]

Saddle: linky

[Smithaam 9]

Thank you 👍