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Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6264
England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
blackwolf wrote:
BogMonster wrote:
...
The Puma is just cranky with gearchanges, I have driven quite a few of all types in my old job, and to be honest with about one or two exceptions the Puma vehicles have all been grumpy particularly the 2-3 shift when hot, which is where mine is poor. Just occasionally you find one that is really good but almost all Puma vehicles I've driven have a slight clack-crunch going into 3rd, particularly after they have a few miles on them.
...


Curious. I have never (yet) met a Puma with a bad gear change and the worst Puma had been better than the best R380 I've met! Although there are many driveline issues with the Puma, the MT82 seems to be about the best bit.

It's actually quite difficult to assess accurately the centre diff backlash without dismantling the box, and a lot of the lash blamed on the diff is usually elsewhere.


I have to agree with Blackwolf on gearbox / gear changes. In my limited experience any issues are usually a result of something else......and I include friction plate as being something else.

that said I personally find the defender to be the most difficult vehicle I've ever driven in terms of getting nice smooth gear changes.
Post #805826 11th Dec 2019 6:07pm
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2010Blackdefender90



Member Since: 07 Jan 2018
Location: London
Posts: 562
United Kingdom 2011 Defender 90 Puma 2.4 SVX Station Wagon Santorini Black
Backlash.... wear, from the diffs, driveshafts, transfer box, and props.... I have front and rear Ashcroft ATB’s and they initially removed all clocking and backlash, and it was a smooth gear change for about 2k miles, clonking is back to the last weak point in the drive train, the transfer box.

Going to get a ATB installed, along with a new output shaft.... but expect gearbox / clutch will give start to go next
Post #805972 12th Dec 2019 3:42pm
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Bluericky



Member Since: 26 Jun 2014
Location: Cornwall
Posts: 647
United Kingdom 2009 Defender 110 Puma 2.4 DCPU Keswick Green
Does anyone know what oil should be in a transfer box with Ashcroft ATB ? https://www.instagram.com/hustynminepark/
Post #806633 17th Dec 2019 3:48pm
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bankz5152



Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2057
2004 Defender 110 Td5 DCPU Epsom Green
Straight mineral EP90.

Nothing else. Instagram @defender_ventures
Empire Tuning - Agent
Post #806657 17th Dec 2019 7:29pm
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Bluericky



Member Since: 26 Jun 2014
Location: Cornwall
Posts: 647
United Kingdom 2009 Defender 110 Puma 2.4 DCPU Keswick Green
Thank you . Does it make a big difference to Semi 75w 90 GL5 and any particular recommendations ?

The reason I’m asking is because I’m having doubts as to what my mechanic put in ! https://www.instagram.com/hustynminepark/
Post #806698 17th Dec 2019 11:34pm
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Bluericky



Member Since: 26 Jun 2014
Location: Cornwall
Posts: 647
United Kingdom 2009 Defender 110 Puma 2.4 DCPU Keswick Green
I’ve been getting some persistent vibration through the drivetrain for sometime now and today took it to a garage in Launceston for a second opinion as nobody seems to be able to find the problem . Two hours later I got a call (impressed) to say that they are 99.9% sure that the transfer box has a bent output at both ends and has probably been in a severe shunt .
I hadn’t told them at this point that the Transfer box was a unit from Ashcroft with ATB and only 9 months old . When I did they said they weren’t surprised and no longer wish to deal with Ashcroft themselves .
My defender has never been in an accident and has covered a mere 3000 miles since replacing the box .
Has anyone got any thoughts on this ? It would explain a lot as all exploratory work into the vibrations has been on the basis that the transfer box is as new !!
I have an entirely new drivetrain as a result and it’s cost me a small fortune https://www.instagram.com/hustynminepark/
Post #842138 6th Jul 2020 5:26pm
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Bluericky



Member Since: 26 Jun 2014
Location: Cornwall
Posts: 647
United Kingdom 2009 Defender 110 Puma 2.4 DCPU Keswick Green
I should add I’ve been in touch with Ashcroft but haven’t received a reply as yet . With videos of the unit vibrating . https://www.instagram.com/hustynminepark/
Post #842140 6th Jul 2020 5:27pm
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ashtrans
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Member Since: 08 Nov 2008
Location: Harpenden
Posts: 253
United Kingdom 
Hi Richard,

I have just emailed a response to try to get this issue resolved for you, Dave
Post #842158 6th Jul 2020 7:35pm
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Bluericky



Member Since: 26 Jun 2014
Location: Cornwall
Posts: 647
United Kingdom 2009 Defender 110 Puma 2.4 DCPU Keswick Green
That’s great thank you Dave https://www.instagram.com/hustynminepark/
Post #842231 7th Jul 2020 6:04am
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