Quote Originally Posted by Perth 110 View Post
I just heard people talking about diff lockers, but I didnt think you would need them on a defender.
Sorry if this is sounds overly basic: Defenders have three diffs:
One is between the back wheels.
One is between the front wheels.
One is between the shafts that go to the front and rear diffs (allowing full time 4wd and no driveline wind-up). And only this diff is locked by the CDL.

When the centre diff is locked a Defender, it is then rigged like any part time 4wd vehicle after they lock hubs and engage 4wd.

So the question of whether a defender needs lockable front or rear diffs is just as relevant a question as it is for a Toyota/Nissan/bishi part time 4wd vehicle.