Apologies in advance for seeking help in my very first post.
I've owned a '99 STS with 48,000 miles on the clock for a short while now, and have slowly fallen in love with it. It's a UK-specification, right-hand drive model that I've been slowly putting straight -- everything from a holed air-con accumulator to missing bits of trim.
And it's been expensive: the parts for UK/RHD cards are (a) rare and (b) have to be imported from Holland. To give you some idea, a driver's side mirror glass is $600 and wheels are almost $1,000 each
Anyway, I have an annoying mechanical problem and am bracing my wallet. When making sharp turns or when selecting reverse, there's a pronounced shudder from the front of the car. I can feel it through my feet but it's not brake-or traction-related. It's something that comes and goes and lasts only a second or two, but it's unnerving nonetheless.
Any idea what this might be? So far I've guessed at anything from power-steering to the engine mounts. Any clues greatly appreciated!