Grinding noise when steering slow and on full lock

[strepcil]

Hi my berlingo 1.6 diesel is making a grinding noise when in full lock or when going slow. This is far worse when left turning. The van steers ok but the grinding can be quite loud from inside. The garage had a very quick look this morning but not on the ramp. He said he dosnt think it's the rubbers and mentioned could be the steering rack which I know is pricey. Any ideas as new to this forum cheers.

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