Diff lock do I have it?

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Hi

As still a noobie to the landrover world I want to know if all discovery 300 tdi's have diff lock?:confused:

The signs on mine are obvious I.e a sticker with diff lock on it.

I have been told that the td5 had limited slip diffs and with mine being a 1999 300 it may have those.

I'm pretty sure that mine is ultimately seized up. But thought I would ask as to be honest I don't have a clue as of yet.

Also can you tell if you are already in diff lock (I know about the light on the dash it's not on) I get a whine at about 45 mph probably unrelated but thought I'd ask

Thanks in advance

Just for your info; your vehicle is a Discovery I, TDi 300, 4 cylinder diesel. TD5 is a Discovery II, with a 5 cylinder diesel engine and as std do not have limited slip diffs, they have Traction Control.
 
In theory traction control is excellent, the problem is that you have to get stuck before it works, and you still don't have full time 4 wheel drive available, you could get down to one wheel drive!
 
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