Power steering clunk

[Jezza_hr]

Hi guys, it's from one issue to another. Any input is mostly appreciated.

The issue I'm facing:

- Low level clunking sound heard/felt mostly at idle or low speeds from both sides of the car when steering
- Only heard when switching directions


Inspected so far:

- Tension rods
- Inner and outer tie rods (no play)
- Control arm ball joints (yet again, no play)
- Wheel bearings (all fine)
- ARB drop links are fine
- Lower steering U-Joint, appears to be no play, fully greased.

My only thought is that pre-load on the rack and pinion might need adjusting, but I need to get hold of a spanner big enough for the job to get at it.
Before I go down this route though, would anyone else have any other ideas on what could be causing the problem?

Thanks,
Jez