ill find the problem first but cheers for offer

done some research could be
universal joint/ propeller shaft or cyl misfire need to check electrical systems( wires, plugs, coils)
plus it seems alot of subaru have clutch chatter

cheers for all the help

Have you checked the mounting bolts for the engine and tranny?

well decided to clean afm with contact cleaner and sprayed other electrical parts. ecu check by connecting black sockets. which came up with constant flash, which means all good. then disconnected battery for half hour to reset ecu. jumped in car ran to operational temp. connected both black and green sockets for ecu reset pressed down acceleration pedal, drove car about minute then came up with error code 32.
got back home disconnected green socket, rechecked, error has gone
did i do this right, is o2 sensor/circuit still need looking at
car seems to be running little off. idles fine 800rpm. acceleration a bit sluggish. 2k to 3k rpm slightly rough.
ill start looking for o2 sensor today maybe repco

Does the vibration go away if you push the clutch in whilst driving along?...if so it will be drivetrain, if not it will be balance, alignment or tyre.

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No Subarus currently owned

with clutch push in does not vibrate. i thought it could be engine running little rough. need to check drivetrain and engine.
replacing o2 sensor. just wondering two sensors or one in gf8. only found one just after turbo, looks like there should be one in exhaust.

97-00 GC8 only has the one after the turbo,

early 93-96 GC3 etc sometimes have one in the drivers side exhaust header as well.

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Long live the WRC

cheers tuna, im pretty new to this but good learning experience.