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Itox

Member Since: 25 Aug 2017
Location: Pazin
Posts: 5

2007 Defender 90 Puma 2.4 CSW Alaska White

Aschroft half shaft with HD Paddock drive flange problem

Hi,

If there's a topic like this I apologise as I've not found it, but I really need help of people with experience and I hope to find it here.

I've recently purchased new Ashcroft half-splines for my defender PUMA 90. (rear ones) and to make stronger, I've also purchased new paddock spares heavy duty drive flanges to use instead of stock ones.
Now.. I see that the ashcroft doesn't have lock ring on the inner side of outer gear, but normally it does have a place for lock ring on the outside of gear - the drive flange lock.
Simply, by measuring and by checking (trying to mount the drive flange both ways, correct and wrong (inside-out to better see the remaining space)), I've seen that the drive flange is too fat, and the place to put lock ring to block drive flange doesn't exit the drive flange..

Please have a look on all my pics, and let me know what to do. Is the Ashcroft half-spline not compatible with stock/paddock spares drive flanges?

Thanks a lot!

25th Aug 2017 5:44pm

Itox

Member Since: 25 Aug 2017
Location: Pazin
Posts: 5

Click image to enlarge

25th Aug 2017 5:46pm

Devon-Rover

Member Since: 22 Jan 2015
Location: South Devon
Posts: 919

2014 Defender 110 Puma 2.2 USW Aintree Green

Those flanges look a little think they are the PM770's? not the PM769's right?

25th Aug 2017 6:08pm

Itox

Member Since: 25 Aug 2017
Location: Pazin
Posts: 5

They are PM769, is that the right one?

25th Aug 2017 6:32pm

Devon-Rover

Member Since: 22 Jan 2015
Location: South Devon
Posts: 919

There are two styles of drive flange used on the Defender. The thick style used up to about 1993, then onwards there is the thin style.

The PM669 is the HD version for the thick flanges the PM770 is the HD version for the thin flanges.

You have a puma so will need the thin style flange QED the PM770

Hope this helps

25th Aug 2017 6:58pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17492

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Why not use Ashcroft HD flanges, guaranteed to work with Ashcroft HD shafts?

25th Aug 2017 9:40pm

SteveT247

Member Since: 21 Feb 2011
Location: Central
Posts: 491

2002 Defender 90 Td5 XS CSW Bonatti Grey

As others have said, you need the thinner drive flanges. Mine (below) are Ashcroft but one of my mates has been running the Paddock ones with Ashcroft shafts for the last few years with no problems.

Click image to enlarge

26th Aug 2017 9:25am

Itox

Member Since: 25 Aug 2017
Location: Pazin
Posts: 5

Thanks everyone, I will try to replace them by Paddock.

26th Aug 2017 9:26am

Naks

Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2646

2010 Defender 90 Puma 2.4 SW Alpine White

apologies for the n00b question: why would one fit these drive flanges as opposed to the LR ones? --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged

Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

26th Aug 2017 10:34am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17492

They're better made, stronger, and last longer.

26th Aug 2017 10:54am

SteveT247

Member Since: 21 Feb 2011
Location: Central
Posts: 491

According to Steve @ Crown Diffs, Ashcroft shafts will also accelerate the wear on standard LR drive flanges due to the difference in hardness between the drive flanges and the shafts.

26th Aug 2017 12:21pm

ickle

Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1795

2008 Defender 110 Puma 2.4 CSW Alpine White

Daft question, but as the flanges are thicker, could a few mm be turned off the outside to allow the circlips to fit?

(as the OP seems to be abroad and with postage etc may be more trouble than getting them spun down in a machine shop)

26th Aug 2017 3:33pm

SteveT247

Member Since: 21 Feb 2011
Location: Central
Posts: 491

I'm not sure you could as there is a rim/lip on them.

Last edited by SteveT247 on 27th Aug 2017 10:07am. Edited 1 time in total

26th Aug 2017 4:53pm

bankz5152

Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2187

Tbh I would still use standard flanges, they end up being the point of failure as well as being cheap and easy to change.

Much better to break a £10 flange and change it in 10 mins or blow a diff instead...

26th Aug 2017 6:22pm

Pickles

Member Since: 26 May 2013
Location: Melbourne
Posts: 3787

2013 Defender 90 Puma 2.2 CSW Keswick Green

I think I've read on this forum that there can be difficulties with these heavy duty flanges etc when fitting them with Dual Finish/SVX alloys on a Puma in that the larger "fittings" will not fit under the standard Landrover centre wheel cap on these wheels?
Pickles.

26th Aug 2017 9:17pm

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