Thread: 2009 Defender Diff Lock

Originally Posted by dearot

Friend of mine just test drive 2009 defender. He asked whether the diff lock in defender is front and rear but unfortunately I have no idea about. So i thought i throw that questions to you defender expert. Thanks.

Centre diff is locked - not front or rear.

As per the above post, the difflock is for the centre diff. The same as RRC, Disco I and II and all other Defenders.

Thanks for the info

dearot

Just so it is clear (and simple), essentially all permanent 4wd vehicles have 3 differentials. The front and rear diffs that allow the left and right wheels to turn at different speeds, and a centre differential between the front and rear drive shafts that allows for the front wheels to turn at a differnt speed to the rear wheels. The diff lock on a Defender, as earlier post have said, is on the centre diff. When locked this ensures power to both front and rear wheels. Front and rear diff locks for a Defender are only available after market. It is often argued that you don't need front an rear diff locks if you have a system such as traction control where the brakes are automatically applied to a spinning wheel (a bit like ABS breaks) to ensure that the non spinning wheel recieves some power. With a 'normal' (non-locked) diff, all the power goes to the spinning wheel.

Cheers
KarlB

Let say a car with TC and CDL

Scenario1:
cdl is not locked and one wheel is off on the air. Where the power will go to?

The power should go to the three wheels that are on the ground.

Originally Posted by dearot

Let say a car with TC and CDL

Scenario1:
cdl is not locked and one wheel is off on the air. Where the power will go to?

Not quite immediately to the ground wheels, Karl, without the centre diff locked and with no traction control, power will go to the airborne wheel. ETC will then apply brake to the spinning airborne wheel and then the power should go to the three wheels with traction.

Originally Posted by ugu80

Not quite immediately to the ground wheels, Karl, without the centre diff locked and with no traction control, power will go to the airborne wheel. ETC will then apply brake to the spinning airborne wheel and then the power should go to the three wheels with traction.

Yep that is the correct answer, old mate must be little confused now