Quote Originally Posted by mudski View Post
The ZD hubs are sealed. Only the TD hubs can be re-oiled.

As for the OP. Check both radiator and condenser to see if they are blocked or not. Air flow is key, especially at low speeds.
Thanks, mate. Good to learn something new. What a bastard having it sealed. I wonder if drilling a set of holes, draining the oil, and fitting bolts through the hub is a possible Quick Fix?