Is it right what I hear that you have to replace Boath shock absorbers rear or front at the same time

It's not vital but if ones gone, the others won't be far behind so whilst the tools are out its best practice too

It's good practice.

You don't really know the condition or origin of the shocks. Mismatched shocks can result in pretty wierd handling.

They're pretty much at end of life at 60k miles anyway, and are cheap. Go for a pair.

Thanks guys.