What is the difference

[didge36]

What is the difference Between lockers and cdl?

[loanrangie]

The CDL only locks drive from the transfer case to both front and rear driveshafts, lockers generally refers to diff lockers which locks the drive from the diff center to both axles.

[nealo]

This is how I understand it
Full time 4wd requires a center diff in the T/case to prevent windup and things going bang...different wheels turn different speeds and the centre diff sorts out the differences. Fitted standard to Defenders, D1 and some D2
In both cases, CDL and diff lock, trouble is, if you have 1 wheel off the ground, all the drive will go through to the path of least resistance and you are possibly bogged

Locking the center diff should mean that 1 rear wheel and 1 front wheel spinning with no traction will cause loss of forward momentum(bogged!)

A diff lock in either the front or rear will mean both wheels on the offending axle will turn at the same speed, removing you from the bogged situation, and your wife forgiving you for spending so much on diff locks

Clear as mud?

[isuzutoo-eh]

A CDL, or centre diff lock, is in the transfer case, what is usually referred to as a locker is the same device but mounted in the axle diff. The CDL locks front and rear drive shafts together. A 'locker', or cross axle diff lock, locks the left and right wheel of one end together.

[didge36]

thankyou for all your help :)

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[frantic]

The models of front and rear different lock are ARB air lockers, or ashcroft, electric like some factory lockers and Eaton, then there are the auto lockers like Detroit.
With air and electric lockers you switch them off on road, a Detroit works as needed so is a set and forget.
LR took away the centre different lock on the D2 for certain years as they thought the traction control was going to be better. They put it back in the last 2? year's of D2 production.
The reason your centre is not locked all the time as somebody else has already stated is to stop wind up and eventually breakage in either the diffs or gearbox, the same goes for air/electric. As when you go around.a corner the wheels go different speeds, if they are.locked they will try and turn at.the same speed and one of. your tyres(one with least resistance) will skip, or something in your different will snap.
In a defender you can engage low range without locking the centre different, this is handy for towing heavy items on road when parking in odd angles. Other makes cannot do this.

[didge36]

So if my cdl was locked in and I put in gear . Both shafts are spinning but no movement. Are both my diffs gone?

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[didge36]

What oil should I use in my td5 2004 disco.

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[isuzutoo-eh]

So if my cdl was locked in and I put in gear . Both shafts are spinning but no movement. Are both my diffs gone?

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Both diffs, or a combination of an axle, drive flange, CV or diff, one at each end, would prevent you moving.
I think the D2 has axle and drive flange as one piece, if so that won't be the problem, but the axles, CV (front) and diffs can all break.

[didge36]

Is my gearbox a r 380?
Is my engine a 200 or 300 tdi?

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[didge36]

I'm sure mine is 2004 td5 disco with dual headlights. Traction control and cdl. Does that sound like series 2?

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[Didge]

Both diffs, or a combination of an axle, drive flange, CV or diff, one at each end, would prevent you moving.
I think the D2 has axle and drive flange as one piece, if so that won't be the problem, but the axles, CV (front) and diffs can all break.

That'd make a racket if axles or diffs were broken though wouldn't it Mark?
I just had a peep at a video on replacing bearing on one of these:
https://www.youtube.com/watch?v=wehm59t0DuA
and it has separate flanges and axles so that'd be my first port of call - check the flanges aren't flogged out cos they're a total showstopper, although it's unlikely all 4 would go at once and it'd be signalled by some severe backlash upon dropping the clutch.

Also, your car is likely to be a TD5 or petrol, definitely not a 200 or 300Tdi. I think they stopped in like 97 or 98 and then Td5's came in. As for gearbox, R380 sounds about right it'd be R380 or later, not LT77. The Disco 2 with the headlights like the latest discos is a TD5 or I think 3.9L petrol. I stand to be corrected there.
cheers gerald

[schuy1]

So if my cdl was locked in and I put in gear . Both shafts are spinning but no movement. Are both my diffs gone?

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Or more likely you have slotted the transfer case into neutral , easy enough to do when you push the leaver into lock!
Cheers Scott

[Didge]

Hi Schuy1, he said both shafts are spinning (I'm assuming that's both prop shafts) so that'd mean he'd engaged some sort of gear, wouldn't it?
didge36, did you have this up on axle stands to check all this or have a look under the car when it wasn't moving?

[schuy1]

Ahh, so he did, well if that is the case he has a most serious problem and expensive too! If the CDL is engaged the car will still drive regardless if 1 of the diffs has failed. This is procedure if you have to remove a tailshaft due to uni fail and ned to get home. There will be noise if its a diff failure and given the axle nut to drive flange is torqued at 400+NMs it is unlikely to flog out:D

[Disco Muppet]

If it's 2004 then you have an update Discovery Series Two, often referred to as a D2a.
If it's a manual it's an R380. Forget the rest of the crap, and there are several posts about what oil to use in them.
Have you had it moving at all? Been off-road?
If both front and rear tailshafts are moving, as has been said you've got a busted axle/diff or CV joint at the front on both ends.

[Didge]

To what crap do you refer DM?

[Disco Muppet]

To what crap do you refer DM?

I'm suggesting the OP figures out why it's not going anywhere with the centre diff locked before he worries about what gearbox he has and what oil to use :) one thing at a time and all that. ;)

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[Didge]

Very good advice old son :D

[Baggy]

Hi Didge,

Whats the back story to this problem .....were you out having some 4WD Fun .......unusual to have a major failure out of the blue as Discos are a robust vehicle.

This could help pinpoint the problem ......

Baggy

[Keithy P38]

Good advice! And a good idea to get the story from the start!

Begin the story again, be clear as to exactly what it's doing/not doing.

From what we read above, your drive shafts (front and rear) are spinning but the vehicle won't move?

Is the vehicle on all 4 wheels?

Cheers
Keithy

[Didge]

Hi Baggy, it's actually didge36, not me who has the problem. I like to think of him as the new kid on the block cos I beat him to the username :banana: