i have a 99wrx wagon pretty muck stock only 3 inch exhaust aftermarket wheels. brought two months ago
had suspension checked wheel alignment and balance done
still vibration not overly bad but noticeable
if feels like it shakes entire car. also clutch jurks in first gear when taking off sometimes in second. i think its on the way out. perhaps this is part of the problem.

cheers

tail shaft rubber mounting?

__________________

Long live the WRC

there is a oil leak some where around rear diff.

also maybe replace gearbox n rear diff oil...

Check your rear inner CV boots.. if they split, it'll throw grease all over your diff, floor pan, etc.

It can also cause the vibration you're describing.

sounds like the tail shaft centre mount has gone. either that or your getting crazy clutch shudder.

cv boots fine. its pretty strange . ill be taking to mechanic very soon for clutch and a proper look over.

centre mounts hard to replace? i see there's two . probably good idea to replace anyway

you replace the whole shaft effectively.
drive way job, and $150 for someone's second hand tailshaft.

__________________

Long live the WRC

I have a tailshaft for sale.. done fark all km.