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Discussion Starter #1 (Edited)
I am having a very hard time finding some much needed parts for a 2005 range rover hse.
Specifically i cant seem to find part numbers for the front differentials inner workings anywhere.
Funny thing is all other cars seem to have availability on the parts in abundance except for the l322... what gives?

my front differentail pinion is seized and wont budge after 270k miles... stranded me in a Utah national park three days ago 200 miles away from closest civilization on my way to Florida from Seattle my first stranding... i almost hopped on a Bisons back to try and save myself but Alas the cell phone came to the rescue! lol

So now sitting in Utah i was able to remove the differential and open it , its clean no shavings everything spins except the pinion so my guess is the pinion bearing is done. I think this is repariable if i can find the right replacement parts.

Symptoms:- I had a lot of hollering noise, and the diff developed a leak on the breather hose around bottom section where it connects to the vent nipple. A closer look suggests the hose has aged and cracked so it failed and that led to the leak.

Could someone kindly advise on
Pinion gear part number- everytime i try to search ford parts pop up... does the l322 use the same parts as a ford?
Pinion part number-
Pinion bearing part number-
Pinion crush spacer part number-
Updated shaft output flange part number-
Perhaps an exploded diagram with the pinion/parts dispelled?-
Pinion nut socket size(it looks like it needs a thin walled 30mm but i couldn't be too sure as i am away from my tools-
The numbers stamped on my differential are 51083 B & 27541 , also the differential part number for my VIN range is TBB000043.
Your help will be greatly appreciated # (Phil help !)
 

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Wasn’t there supposed to be a thread for someone parting out a 2012 Autobiography? Can someone link OP (and me) please?


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smart money says buy a low mileage used part and swap it in
 

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Discussion Starter #4 (Edited)
Wasn’t there supposed to be a thread for someone parting out a 2012 Autobiography? Can someone link OP (and me) please?


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I have an 05 hse not a 2012... Parts for the 05 seem scarce when it comes to stuff like differential s... spent two days looking and i see everything but the l322
 

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Discussion Starter #6 (Edited)
smart money says buy a low mileage used part and swap it in
Been lookig around for two days and what i am seeing is scary... the differentials on ebay are not specific enough in fitment so i had to use the VIN range as a guide , i found two that are a close match within my VIN range so i might buy the worst looking low mileage one take out the pinion and swap it .. i am worried about the the conditions of some since many seem to have beein in accidents or floods form the looks of it... at least i know mine is in good shape except for that pesky pinion bearings etc...
 

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Have you taken the bearing out? It may be a standard size bearing and have ID marks on it. There are shops that specialize in bearings and they might have a match.
 

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Discussion Starter #8
Have you taken the bearing out? It may be a standard size bearing and have ID marks on it. There are shops that specialize in bearings and they might have a match.
No not yet i dont know what size socket that large nut needs.. it looks like a slim 30mm..can you confirm that...
 

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Discussion Starter #10
Anyone know what size socket is needed for the notorious shaft output nut? it looks like a slim 30 mm to my trained eye but i could be a biscuit short....
 

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Discussion Starter #12 (Edited)
Spacer pinion bearing , LR007771...It would be great for the whomever comes up with an L322 parkts kit containing all these above items sold in one package as they are so hard to find....takes quite a bit of keyboard time... i suspect this part is the cause of my seizure... heated up and pressed on to the bearing will find out tomorrw when if i can remove the notorious retaining nut...
 

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Please post pics of your work such as removing the diff from the truck, opening it, repairing it and fitting it back. Not much info out there on this topic.
By the way, my 05 used to leak at the top of the breather pipe in the engine bay out of nowhere. No crack in the breather hose, no overfilled diff. I added a vaccum hose to extend the top further away from the engine and it no longer leaks. If your symptoms are true, my turn might be coming up?! Crap.
Sorry you got stranded. Hope you get it sorted pronto.
 

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Discussion Starter #14
Please post pics of your work such as removing the diff from the truck, opening it, repairing it and fitting it back. Not much info out there on this topic.
By the way, my 05 used to leak at the top of the breather pipe in the engine bay out of nowhere. No crack in the breather hose, no overfilled diff. I added a vaccum hose to extend the top further away from the engine and it no longer leaks. If your symptoms are true, my turn might be coming up?! Crap.
Sorry you got stranded. Hope you get it sorted pronto.
yes i got stranded lol. tripple a came looking and brought me to civilization for free!... i will take some photos.. i have 270 k miles on this differential so i was expective a failure... will know today if i can repair it and put it back in...
 

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I’ve attached parts of the original Q041 Service Action document below, in case bits of it are of any help. This is the UK version of the document and I don’t know if this differs from the US version.

Setting the pinion bearing preload via the collapsible spacer is not straight-forward and requires accurate measurement to achieve the required drag torque of 1.4Nm +/- 0.2Nm. Also note that you should not lubricate the new tail bearing as it is supplied coated with a special low friction oil. A load of between 2 & 5 tonnes is required to press the tail bearing cup into place.

Phil










 

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Discussion Starter #16
Thanks Phil , this is what i needed to see , unfortunately i do not have all the speciality tools to do the job so i have to send the carier in to the local range rover indie that specializes in differentials here in Utah .
I am ssuming something inside the pinion has failed because it cannot spin it. should it be spinable by hand pressure or is the pre load so high that only a shaft can spin the unit? with the wheels jacked up when i rotate either front wheel they both rotate easily but the shaft does not , so i too the wheel off and disconnected the shaft , tried to spin the flange/pinion and cannot move it at all. is that normal?
 

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Nice going! I see you dropped the subframe. Did the axles or control arms put up a fight? I like the idea of repairing it too instead of sourcing a donor.
 

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Discussion Starter #18
Nice going! I see you dropped the subframe. Did the axles or control arms put up a fight? I like the idea of repairing it too instead of sourcing a donor.
It took about four hours to tear down the entire front end ,fortunately i had the front end tool kit with me on this trip , its the set that loosens knukcles without breaking a sweat, it was easy enough... dropping the frame is the only way to remove the differetial from its location , it comes out backwards over the swaybar right next to the drivers side exhaust.

The hardest part is finding parts ... and or a shop to do the job without it taking a week. if i knew all the part numbers i can overnight them and then go to a shop prepared with everything, i do not have a five ton press or the speciality tools to crush the spacer its. . i dont have the inch/pound driver tool etc..

So all i can do is tear down and install after the unit has been serviced. I'd much rather have my failed unit rebuilt then spend money buying an item on ebay that was submerged in a flood or was in a massive accident which on the outside looks good but no telling what kind of vibrations you will encounter when the unit has been installed.. .then you have to go through the teardown once again the get rid of the used unit...
 

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Discussion Starter #19
The crown wheel is a Dana unit so i suppose the pinion is a Dana too... but the stamped number does not generate anything online... i counted 40 teeth... but it has 41-11 stamped on it.. i might have missed one...Iam pretty sure the crown wheel is the source of the dronning noise as the gaps have worn over the years , its the only part that spins as fast as your wheels.... i hope to replace it with a new one.
 

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...should it be spinable by hand pressure or is the pre load so high that only a shaft can spin the unit?
Yes, it’s only 1.4Nm so you should be able to turn it by hand - it just won’t ‘spin’.

During the 14 years that I’ve been a member on this forum I can’t recall a single post where someone actually took their front final drive apart, so it’s very useful if you can report what you’re up to and include photos wherever possible.

RAVE doesn’t give any information on rebuilding the unit as LR dealers are told to just swap the complete unit out, which is why Microcat doesn’t give any part numbers for the internal bits except for the collapsible spacer, tail bearing, oil seal, flange & nut which were part of the Q041 Service Action.

We therefore have no information whatsoever on, for example, the head bearing. It certainly makes a lot of sense to let a specialist sort this out as the setting of the bearing preload is critical to the durability of the unit.

Phil
 
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