[MattKab]

Your shimmie is a rarer one!

Check all of the above as well as the joints in the steering. Pay particular attention to the idler bushings and steering box.

It appears there is no single component that goes bad and causes the 'shimmies'.. Slop in the steering combined with general wear in all the joints.

Bad front and rear shock absorbers, collapsed rear springplate bushes, sagging rear torsion bars will all add up and will cost you front castor.

Is your suspension modified? Any play in the steering? What was your wheel alignment set to? The stock wheel alignment settings require everything be in A1 condition, wheel camber zero crossing during driving will change the loading/direction of loading on the steering joints, any slack and there is a shimmie. SuperBeetle wheel alignment is EVERYTHING, when our cars perishable parts get old, the optimum wheel alignment changes as you drive.

Pinpointing one component and replacing it may feel like it's sorted- but it may not go the distance and/or something else will go really bad as a result.

Matt