Front and Rear lockers... Why?

[Will Wallace]

For years I have wondered, but never asked.
If the center diff is locked, and the rear diff is locked, then why would you need a front locker?
To me it doesn't make mechanical sense.

If centre and rear are locked, then isn't the front essentially in lay terms also locked.
I understand it isn't locked, but it also shouldn't slip.

[PSI250]

Without a front locker the front is still only "1" wheel drive. If that one wheel is in the air or on very low traction surface well then your relying solely on the rear.

[Will Wallace]

If the centre diff is locked then thus should not be the case.

[isuzurover]

If the centre diff is locked then thus should not be the case.

With the centre diff unlocked you have one wheel drive (lift one wheel off the ground and you will go nowhere).

Centre diff locked gives you 2wd. Add rear locker gives 3wd and so on. If you only have a rear locker you can still spin one front wheel with cdl locked.

[Will Wallace]

I don't mean to sound rude, but please read the original post.
My question is laid out there clearly.

[Will Wallace]

Does the LT 230 not fully lock?

[rangieman]

I don't mean to sound rude, but please read the original post.
My question is laid out there clearly.

Re read isuzurovers post if you dont get that give up and buy a dunnydoor

[V8Ian]

Will, lock the CD and the front and rear drive shafts turn at equal speeds. The drive is then split at the front and rear diffs, the wheel with least resistance, at each end will turn. Now lock the rear diff and each rear wheel will turn at equal speed but the front wheel with least resistance will be the only wheel on that axle being driven.

[isuzurover]

I don't mean to sound rude, but please read the original post.
My question is laid out there clearly.

I read and understood your question the first time around. There is something lacking in your understanding of how diffs work.

When you spin one wheel on an axle it turns twice as fast as when you are turning both wheels. Is that the bit you are missing? If you have 2 diffs locked the 3rd diff can still spin one wheel twice as fast as the other 2 or 3 are being driven.

[Will Wallace]

I must be missing something.
If the CD is locked, therefore forcing the front and rear drive shafts to turn at the same speed.
Then you also lock either your front or rear diff, the remaining open diff will not allow full differential action, as it is not locked but restricted by the locked CD and cross axle diff lock.

Therefore there there should minimal to no slip on the open cross axle diff.

I understand how a diff works. The reason for the original post is, why do people put in front and rear lockers?

I really must be missing something.
Hahaha