Curenlty have a wrx 2.5 hawkeye went out in it last night on a long drive and car was vibrating really bad what ever speed a did got better the faster i drove but then let off the gas and the vibrating though the car was extreme parked it up last night and got in it this morning drove down the road and car is whinning and when you turn the steering on full lock the whole steering wheel shakes like mad any advice too what it could be as iam baffled new too subaru 

Sounds steering related to me from your description. Pump, rack. Check fluid under the air intake, lines for leaks and see if any of the boots have split. On full lock mine whines and vibrates a little. Not advisable to use full lock like that though.

Def sounds like power steering related, if the fluid level is ok then i would guess the pump may be on the way out.

https://www.scoobynet.com/car-parts-for-sale-437/1060604-blob-hawkeye-power-steering-pump-and-pipe-work-kit.html

One for sale I stumbled across