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Home > Puma TDCi > Output shaft - updated genuine or Ashcroft?
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shropshiredefender



Member Since: 05 Jun 2017
Location: Shropshire
Posts: 445

England 2011 Defender 110 Puma 2.4 USW Santorini Black

blackwolf wrote:

* Given that both the MT82 gearbox and the LT230 transfer box have been in production for a long time, apparently without any dimensional issues, it does seem likely to me that it is the adaptor housing which is the major part of the problem. it would be very interesting to compare the dimensions of one from a shaft-eating vehicle and one from a non-shaft-eater.


I'm not sure if this helps the alignment theory or not - I had an Ashcroft output shaft fitted around 10k miles ago, after 70k+ miles the original was worn but had life left in it.


Click image to enlarge


I've just had an Ashcroft re-con transfer box fitted.
Both the original and re-con transfer boxes slid easily into place.
To my mind this indicates good alignment = over 70k output shaft life, tending to substantiate Blackwolf's alignment theory, that is to say that on mine MT83, LT230 and adapter housing are all within tolerance.


Last edited by shropshiredefender on 11th Jan 2019 3:19pm. Edited 1 time in total

Post #750541 11th Jan 2019 2:08pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 9044

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Your 70k shaft is substantially more worn than my bog-standard original shaft was at 150k. This does to my mind tend to suggest the alignment theory since shafts on your vehicle appear to wear faster than shafts on mine.

Post #750547 11th Jan 2019 3:05pm
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shropshiredefender



Member Since: 05 Jun 2017
Location: Shropshire
Posts: 445

England 2011 Defender 110 Puma 2.4 USW Santorini Black

Yes - that's the worn 70k+ shaft I thought that was a good life! Compared to your experience it's not Shocked

I expect/hope that the lubricated Ashcroft shaft will be much better Cool

Post #750549 11th Jan 2019 3:06pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 9044

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Well, to keep it in perspective, you have had ten times the mileage that some people get!

Post #750560 11th Jan 2019 4:13pm
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DSC-off



Member Since: 16 Oct 2014
Location: North East
Posts: 416

United Kingdom 2015 Defender 110 Puma 2.2 XS CSW Aintree Green

" that is to say that on mine MT83, LT230 and adapter housing are all within tolerance."

They may well be, all of the early failure 'boxes, adapters and shafts may also be with in the manufacturing tolerance.
Wether those tolerances were correctly specified to make a product that has an acceptable life under all possible variations is another matter.
There are 2 possibilities,
1) the system was designed with too much variation to achieve acceptable alignment and product life.
2) the quality control procedures failed to maintain the assembly with in its designed limits, if it was correctly specified.

So the problem is either a design failure or a manufacturing failure. Landrover's fault and they didn't fix it.
Pot luck as to wether you get a good one or a bad one is not good enough!

Post #750573 11th Jan 2019 5:35pm
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ozzie1989



Member Since: 25 Feb 2009
Location: Wales
Posts: 183

Wales 2010 Defender 110 Puma 2.4 USW Bonatti Grey

This is mine at 55k... Splines are worn (although strangely some are not???) but out of the vehicle the coupling is surprisingly tight by hand considering the clunking!

It was changed at my request as I had the clutch done, so figured I'd do it whilst the box was out. Full write up on that coming soon...


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 Now: 2010 2.4 TDCi 110 Utility Wagon
Then: 2004 2.5 TD5 90 Hard Top (X-Tech Edition)

Post #750619 11th Jan 2019 8:23pm
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Julie



Member Since: 07 Oct 2017
Location: Nantes
Posts: 57

France 2012 Defender 110 Puma 2.2 SW Keswick Green

shropshiredefender wrote:
I'm not sure if this helps the alignment theory or not - I had an Ashcroft output shaft fitted around 10k miles ago, after 70k+ miles the original was worn but had life left in it.



Click image to enlarge


Not too much live left in that one. It looks like my shaft that failed in the Alpes mountains.

I don't believe the misalignement theory. Misalignement causes wear but it can be controlled so easily in the production line. And everybody can proof it. Why should Land Rover have taken such a big risk in a period of 10 years?

I think it's the corrosion products being harder than steel. The corrosion products are the sand in the joint and they grind it down.
The rise of temperature changes / load changes / periods of hard use accelerates the process.

In the Alpes I stranded at the workshop of a technician for harvest machines. Each and every harvest machines has the same kind of joint in it (and it must be lubricated). If it falls dry it will wear and fail.

Post #750679 12th Jan 2019 10:01am
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Roy5695



Member Since: 15 Feb 2014
Location: Cornwall
Posts: 622

United Kingdom 2011 Defender 110 Puma 2.2 XS DCPU Indus Silver

This was mine after 38k miles.

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 2011 Defender DCPU 2.2

Instagram - www.instagram.com/royljprice/

Roy

Post #750681 12th Jan 2019 10:15am
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