Not so long ago, I fitted 2 new Munro shocks to the rear of the GT, with unsatisfactory results.
Under the car last weekend and one shock has leaked oil all over the rear suspension and backing plate, the rubber on the swing arm has absolutely had it, however I had not experienced any knocking and it wasn't found until I was working under the car, maybe found it just in time.
Just wondering if their quality is becoming a question, would you believe it they are just out of the guarantee!!!