Had a mechanic listen to noise. He said the back-up motor seemed OK! But he think that the cogs in the rear steering box are worn or loose, and he also thinks it's a sealed unit and it can't topped up with fluid; so it looks like a replacement steering box! How much do you think it will cost me for a new or used unit?

wear in the motor or as marty mentioned maybe needs a bit of grease or something, haven't a clue what  size the allen key is, sorry. 

This I'd like to solve aswell as Mine just started doing the same thing :o( is your red 4WS light coming on at all ??  

Chipster [ICOC]
ST183 4-WS (Auto) 1991

 

It comes on every time when I switched the ignition on and goes off once the engine's started. It stayed on only once and didn't go off when the engine started. But after I turned off the engine and restarted it, then it went off. That was the only time it happened; after I've been trying to investigate the problem by tapping the backup motor and twiddling the wires that goes to the motor.

rear fogs? - Legal requirement is for one on the drivers side, most conversions use the 2 inner brake lights.

Congratulations mate, you're the first person to have this problem, you're a pioneer!! I'd reckon ?100 from a scrappers.

I MAybe the second then as mines still clonking and the 4WS light comes on !