Thinking about this, it seems odd that two Haldex units have failed after having had the rear diff done. I wonder if they refilled the Haldex properly. You should:-
1 Fill the Haldex until oil runs from the filler plug.
2 Replace the plug, switch on the ignition and leave it for 5 minutes.
3 Remove the plug and extract exactly 70ml of oil from the Haldex.
4 Replace the plug.

I wonder if they overfilled the unit causing the pump problems. John
07 HSE Narvick Black
Land Rover Series One
Triumph Rocket 111 (sadly gone!)

2.5 Refill again until runs out

Otherwise you could remove from the start the 70 ml. You need to properly fill all the Haldex's internals, so that's the reason of switching the ignition for 5 minutes. The electrical pump will circulate in that interval the oil inside the Haldex.

Quite right Alex, I missed out a step! I think I need to go to bed! John
07 HSE Narvick Black
Land Rover Series One
Triumph Rocket 111 (sadly gone!)

Hi Jacques,

Did you get any joy on your issue? I'd like to know what progress you have made or what you suspect is the problem?

Regards Dean.

Well the story so far...

Rear Bearing replaced, juddering at pull away manifests itself. Take back to diff specialist - no fault with diff.

I reasearch possible issues and contact a local "Specialist" explain concerns and give my laymans diagnosis

Vehicle picked up from my home and taken to NORTH EASTERN 4X4" a LR specialist (tern used very loosely) They carry out a diagnostic check and state "no faults stored" they agree with me that there is probably a fault with the haldex and drive the car back to me saying that it shouldn't be driven (?).

Not convinced that NORTH EASTERN 4X4 actually know what they're doing I take the car to another recommended LR specialist - PVH LANDROVER who has now told me that the whole haldex unit needs replacing, I've asked them for a printout of recorded faults and they have refused to give me one (they also lied to me which I wont go into as its not fault specific but needless to say I don't trust them - you don't lie to paying cutomers!!).

I'm taking the car to a third specialist today TEAM VALLEY LANDROVER (recommended on here) whom I hope will be honest with me and offer a solution!!

I'm getting tired of all this now - its not supposed to be this hard!!

Thanks for the update - I think its Haldex related myself, given that there are instances of the same thing it is unlikely that differentials are all being incorrectly assembled.

As everyones Haldex is only being emptied and simply re-filled then it would seem logical that this is the area that needs to be 100% confirmed correct before anyting else is done - again I can't see how everyones Haldex develops the same "major" mechanical fault. On pulling away most of the power is transfered to the rear wheels so my thinking is that the Haldex is not engaging correctly.

I am wondering if it something to do with priming the Haldex when it is filled as I have read that this procedure needs to be followed correctly with the exact amount.

Let me know how you get on.

I just found on the haldex gen IV website fro borgwarner that when parking much lower pressure is applied to the clutch - this suggests to me that the pressure is not being set correctly , perhaps not enough oil in the unit...

The story continues.

If the juddering occurs only when there's steering input it's almost certainly the Haldex. And the problem is that it's not dis-engaging properly.

The Haldex is just a clutch - albeit a multi-plate, wet-plate clutch with hydraulic actuation and electronic control. Thus the principle of operation is simple - when drive to the rear is needed the clutch engages, and when it's not it dis-engages. Except that it never fully dis-engages so there's always some drive to the rear. (So it has some of the properties of a viscous coupling as well as a clutch.)

When moving off from rest the clutch will be engaged (hydraulic pressure applied to the clutch plates) resulting in a 50/50-ish split of torque front/rear - unless steering lock is detected and the Terrain Response is in normal mode, in which case the clutch is disengaged (hydraulic pressure released) to prevent the judder you are experiencing.

So the problem would appear to be that the clutch is not dis-engaging properly. But from the above it should be apparent that there are several potential causes for this - the electronics may not be commanding the release of pressure, the control valves may not be responding correctly, the clutch plates may not be releasing, etc. And incorrect handling of the Haldex during the diff repair could have caused damage to any of these areas. It may even be as simple as topping up the fluid level (although lack of fluid is likely to have caused other damage).

Unfortunately most garages won't try to diagnose this kind of problem fully - they'll just replace the Haldex and have done with it.

Thanks for your input on that. It does appear to be exactly as you said and fits it with something I found earlier on the Borg Warner haldex site regarding fourth generation haldex operation. The Car is booked backed in next week for further investigations, I will of course update everyone accordingly.

Many thanks for your help.

Jacques,

Did you manage to get a resolution to the issue? I'm still struggling..

Regards, Dean

Had the jerky Haldex issue after rear diff bearing problem was repaired at non main dealer. ie on full lock jerk from rear wheels.
Symptoms cured by local mechanic Peter Atherton in Parbold 01257 462257.

He took Haldex off, emptied it, followed precise refill instructions and voila, it worked.

Interesting. More evidence that it really is critical that the Haldex re-fill instructions be followed to the letter.

hello,
I have a Land Rover Freelander 2 , MY 2010, 190000 km with Haldex 4 Generatin and the car drives like it has a fully locked rear LSD, no more wheel spinning but it scrabbles stones etc when doing 3 point turns, or on full lock driving slowly. I changed (new parts) pump, electronic control module, Oil. Also I disassembled the haldex unit, I clean it and nothing seem to be wrong inside (clutch plates ok)..
I have the message with "transmision Fault, Traction reduced".
On the computer scan I have next error:

P0961-62 RDCM
Pressure Control Solenoid A Control Circuit
Range/Performance-Signal compare failure - 80%

I make a complet scan for errors to the car and evrything is ok.(no ABS errors, steering ). I visit it the local dealer Land Rover and they tel me to change the unit. What do you think, I must change the whole unit?
Any Idea ?

Bob the "ECU fix for 2WD" is pulling the fuse out on the boot. Sounds like you're dealing with a dubious garage to me

djm wrote:

Had the jerky Haldex issue after rear diff bearing problem was repaired at non main dealer. ie on full lock jerk from rear wheels.
Symptoms cured by local mechanic Peter Atherton in Parbold 01257 462257.

He took Haldex off, emptied it, followed precise refill instructions and voila, it worked.

I have the same problems after the rear differential bearings done.
Do you remember how many kilometers/miles you drove till solving the problem?

My car is "under investigation" at the mechanic who made the rear diff work.

Tomorrow I gonna call him immediately but I've run already120 kilometers