03 Tsport Clonking Noise, Please Help

[cameroon95]

H guys,

My corolla has started infrequently making a rather loud "clonk" style noise. This isn't constant and happens only now and then , but it is very loud. I notice it must when Im coming off a junction it is sometimes very noticeable and increases in speed/frquency and when I go to a set of lights and brake it gradually slows down, but then it usually goes away. I,e it doesn;t seem to stay for long.

Not sure if it is engine releted as the engine is performing well ? Any ideas on what to check?

Thanks very much