1999 Land Rover Defender

1999 Land Rover Defender Four Wheel Drive Manual 180000 miles

Already have Traction control. Do a lot of off road etc.
Would diff lock/s on axle/s (already has centre diff lock between axles) make a positive difference considering traction control operates automatically on the car.
Would they compliment or conflict? No teories please. Just facts!
Have you ever heard of ETC combined with diff lock/s and what result?
Thank you.
Happy to donate but can only direct transfer to bank?
Details please.
September 6, 2009.

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