I have had for a few weeks steering issues at first I thought it was diff wind up on the front differential so I sent the car in to my local Indy.
I ended up having the transfer box rebuilt and a new drive shaft fitted. I got the car back and went on holiday to Norfolk and everything was fine until a couple of days in when it felt at low speed on full lock like both wheels are trying to turn at the same speed the fault appears to be intermittent as it doesn't happen all the time I took the car back to the Indy and yesterday and we had it up on the ramp all of the drive shafts seem to work fine and all of the wheels a turn freely on both locks. Has anybody come across this type of fault or any idea what it might be as I baffled at this point.
Any help would be much appreciated.

Any idea would be grateful

Can you describe the actual symptoms you're experiencing ?
What made you think the diff was winding up ? Paul,
2001 Discovery 2 TD5, 211,000 miles & climbing
2006 FFRR TDV8 Vogue 145,000 miles & climbing
Member of Midland (Land) Rover Owners Club, www.mroc.co.uk

when it's on lock It feels like one of the wheels is dragging as if they are trying to turn at the same speed but it's intermittent

Does it happen at very low speed & does it happen on different road surfaces?
Is it practical to have someone watching each front wheel from the side as you move forwards when it happens ? They might be able to add additional info to help diagnosis of what is actually happening.
As you say it does sound a bit front diff related, but if it was the diff., I'm sure there would be other symptoms / noises.

While reversing off our drive at full lock I get something slightly similar, but on ours I know that it's 1 of the front tyres slipping on the very smooth kerb stone while the tyre has very little contact due to the castor / camber effect at full lock.
1 of my other cars does it even more due to even greater castor & stickier tyres. Neither car does it on normal road surfaces or going forwards.

Do you have any lights or other indicators on the dash when it occurs ?
Is it possible the Traction Control is trying to operate on 1 wheel for some reason ?
Have you used a diagnostic tool to see if any faults (especially wheel speed sensor related or ABS / TC) are indicated ? Paul,
2001 Discovery 2 TD5, 211,000 miles & climbing
2006 FFRR TDV8 Vogue 145,000 miles & climbing
Member of Midland (Land) Rover Owners Club, www.mroc.co.uk

It happens at low speed mainly on all types of road including dry mud, I will have to see if the wife will stand in-front of it and check the wheels see if she notices anything. I thought it might be diff related to but at the INDY we had it up on the ramp all 4 wheels off the ground and could see or hear anything.
I had a lot of work done on the transfer box as that was coursing a similar problem but on a greater scale
There are no lights on even plugged in my ODB II tool no faults present