B44.1 handling issue please help

[richie.]

I'm fearful of the old man chucking the hobby in because his car has become a handfull leaving us scratching our heads! An example is when driving down the main straight, if you back off the power on the bend the back end will just spin out 180 degrees on you very quickly. It's a similar story all around the track. I've tried all sorts of individual changes one at a time but nothing seems to shift the balance of over sensitive back end and steering. Is there anything wear and tear wise that could have led to this?