steering "catches" when turning

[cdnp6]

I have recently noticed my LHD 2000 TC steering catching during turns, more so on a left turn. With the front end lifted, no dead spots are felt in full lock to lock steering.
Is this problem more likely to be steering box or idler?
Roy

 

[harveyp6]

Systematically disconnect the steering from the pillars back towards the box until the problem disappears.