Hearing a loud thunk from the rear of my Bongo

[stickypool]

Even when driving on a flat road. Any ideas what could be causing this? At a guess it could be the suspension, but how would you check it to find out if it needs replacing?

[Veg_Ian]

Shuffle underneath on your back, you shouldn't need to jack it up, and look for anything obvious. A common failure is a sheared rear ARB brackets. There's one on either side.