I have purchased all the parts as per Tech Bulletin LTB00342 (Rear Diff Lower Level Repair) but I need a few extra bits and pieces now as the filings from the worn pinion bearing have the other bearings. I need the rear bearing (the markings on the part read HM88610/2/QCL7C) and two other bearings (the markings say 32008X-QCL7C) Has anyone any idea of the LR part nos? I also need info on the oil required- I think two grades are required, one of which looks like Hypoid 80w90. Any ideas folks? Thanks in advance.

http://motioncomponentsltd.co.uk/shop/product.php?pid=7582

http://motioncomponentsltd.co.uk/shop/product.php?pid=1569

Can anyone confirm if these are the ones I need?

Hi Barryc, I you want to pm me your full vin I can look up your car and what parts are applicable and get back to you with some part numbers.
Hope this helps

Cheers Boss! Check your PM in a minute or so!

An update for those who are interested:

The bearings linked above are indeed the ones that are required. They are housed in the diff body and are not shown in the LR Autocat diff schematic- they apparently can't be purchased from LR who would prefer to replace the diff. In my case, an "exchange" i.e. reconditioned part was priced at €900!

You need 1no. HN88610/2/QCL7C bearing and 2 no. 32008X bearings ("greaseback" QCL7C type is apparently no longer available) plus Hypoid 80x90 gear oil (Part No. LR003156, approx 3 litres) and Haldex coupling oil (LR003136) (Cheers for the info Superspark!)

My original bearings were damaged by filings in the diff oil from the damaged bearings detailed in the LTB "low level repair" bulletin. I have replaced these as well. The bulletin no. is in the post above.

Several hours of rebuilding later and the diff is working silently and effectively at a tiny fraction of the cost of a replacement part. Happy days!

Regards
BarryC

Hi barryc glad you got your diff repaired, how much did all the parts cost you in total not counting your labour as im interested just incase mine goes the same way regards darren

Hello BarryC,
did you followed the technical bulletin that was updated 11/18/11 or the first one from 11/17/10 ?
If you have the updated or any one else have it, i would be pleased to see it.
Nice to have the newest before starting ordering parts.

Got mine to do as well, so any tips or experience you can share would be gratefully appreciated.  Discovery 3 SE
Freelander 2 HSE

get some pics taken and be the first on the internet to do a tutorial!

Good man BarryC!

Taking on this Black Magic LR job at home. What were your thoughts on the diff etc when it was in pieces. Do you think they went too small with the pinion bearing? Is that the main reason for all these failures. If it is, you would think some LR engineer would put their hand up and say "hey wait a minute, perhaps we should improve something here" Instead they continue to churn out the same unit by the thousands.

Perhaps it's a software issue and not a hardware. Why did LR insist with Haldex that every start should be a locked 4WD when 99.99% of starts are just going to work or to the shops? The original Haldex concept was "if a wheel slips it requires a lock-up" That's what you got, and because you got a slip meant the surface wouldn't hurt the drivetrain.

I see Haldex are now using this lock-up on start with their latest unit on all applications. I wonder if their other client diffs are engineered to take the torque without premature failure?

Anyway getting back to the diff rebuild...how did you get on without the LR special tools Barry? Freelander 1 HSE TD4 Manual in Falklands
Freelander 2 HSE TD4 Auto in Chile

rockhopper wrote:

Perhaps it's a software issue and not a hardware. Why did LR insist with Haldex that every start should be a locked 4WD when 99.99% of starts are just going to work or to the shops? The original Haldex concept was "if a wheel slips it requires a lock-up"

Q106 is just doing that. Few knows that it addresses the Haldex too, besides the transmission.
So indeed, the bearing problem was also, in a bit measure, a software problem.
The update will "ease" a little that lock-up on start-up you are talking about.
And don't worry, the lock-up takes into considerations a lot of other factors (speed, steering wheel direction, etc) when it locks the clutch.

Besides the Q106, only and only for those who changed the rear bearing, there is a Special Service Message who instruct dealers to change the Haldex firmware in order to avoid another problem with the bearing. See below.
I believe that some diff. asy. have some problems and/or they have some greater tolerances, things that, in time, lead to bearing failures. The other ones, resist to the stress and don't need a new bearing and/or a software update. Therefore, for the weak differentials, where the bearing was already replaced, in order to mask the weakness or to cope with the problem, a new software was designed, for not happening again.
More of that, I've seen another SSM where there are described methods of inspecting the rear differential. There were described problems with the toothed wheels inside too, besides the bearings, thing that make me think and belive the above.
I may be wrong, but this is just my 2 cents...

Thanks Alex for your info on the SSM etc.

It seems to me it would be nice to have the software improvement done before the bearing is destroyed rather than after.

The result of a failure presents a different problem for each owner. For me, I could be 2000km or more from a LR dealer.

I'll consider carrying a repair kit, that's if it's possible to do the repair without special tools. Freelander 1 HSE TD4 Manual in Falklands
Freelander 2 HSE TD4 Auto in Chile

Hi,
today we got same Problems at our FL2 MY2007.

Does anyone have some explode drawings from Haldex and rear diff for better understanding and fixing ?

Thanks