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Home > Technical > Haldex making wheels judder... |
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Yorky Bob Member Since: 28 Apr 2015 Location: Yorkshire Posts: 4561 |
If you can get to visit this guy you would get a good service / repair at a fair price. Otherwise its what you have locally to do you a Haldex service. Service parts and oil are available from several places to include Bell.
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26th Jan 2019 2:38 pm |
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Space Member Since: 26 Jan 2019 Location: FOLKESTONE Posts: 148 |
They are sadly quite far from me!
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26th Jan 2019 2:49 pm |
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Carel Kriek Member Since: 01 Aug 2016 Location: Stellenbosch, Western Cape Posts: 134 |
If I understand correctly the Haldex couples the rear diff to the prop shaft. Whether it is coupled or not, how can it make the rear wheels judder since the rear diff should still operate as required?
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26th Jan 2019 3:40 pm |
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Yorky Bob Member Since: 28 Apr 2015 Location: Yorkshire Posts: 4561 |
https://web.archive.org/web/20131220142615...story.aspx FL2 MY10 TD4 GS traded in at 2 years
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26th Jan 2019 4:04 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4946 |
Download the free "workshop manual" (search for it) - its all in there - the Haldex is called a "On Demand Coupling". What you are looking at is, depending upon the age of the vehicle, removing (or not removing) the Haldex unit to replace the replaceable filter, clean the non-replaceable filter (in the pump) and refill with new Haldex oil - the earlier the vehicle the easier it is. The problem is access; on mine (late 2014 plate) I had to remove the exhaust pipe, disconnect the prop shaft before removing the Haldex and even then I could not get access to the pump filter unless I made a tool to get the massive drive flange off which I simply did not have time to do (bad planning on my part) Jules |
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26th Jan 2019 5:52 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4946 |
The rear diff only caters for differences in the path between the rear wheels. The Fl2 is normally front wheel drive and only becomes 4WD when the Haldex locks up when wheel slip is detected by the rotation sensors. In tight turns the front wheels follow a very different path to the rear wheels. So if the Haldex is stuck on the FL2 is now permanent 4WD without a centre differential. On tarmac, without some slippage between the propshaft and rear diff you get transmission wind up if the Haldex is stuck on - eventually the tyres start skipping. When on loose ground the tyres can skip easily so you dont notice it. In the pre-Haldex days with permanent 4WD vehicle like the D1 and D2 you had a centre differential between front diff and rear diff - you could lock this up if the ground was slippery but it caused the tyres to skip if on tarmac and thus was only for off road use. Hope that helps. Jules |
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26th Jan 2019 6:01 pm |
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Steve D Member Since: 19 Jan 2013 Location: Essexshire Posts: 4102 |
I serviced the Haldex on my 2012 Evoque - should be the same as your FL2 depending on the year. Perhaps a new filter, oil and clean out of the pump filter will cure your troubles? https://www.evoqueownersclub.co.uk/forum/2...tures.html Past: FL2 TD4 HSE Auto Evoque SD4 Dynamic Lux Auto Present: Audi A3 S Line. |
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26th Jan 2019 6:34 pm |
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Space Member Since: 26 Jan 2019 Location: FOLKESTONE Posts: 148 |
Thanks Steve.
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26th Jan 2019 6:45 pm |
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Carel Kriek Member Since: 01 Aug 2016 Location: Stellenbosch, Western Cape Posts: 134 |
Many thanks for the info and good explanation Bob and Jules!
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27th Jan 2019 9:03 am |
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Space Member Since: 26 Jan 2019 Location: FOLKESTONE Posts: 148 |
Is the removal something than can be attempted with ramps on the drive way? |
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27th Jan 2019 9:44 am |
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Yorky Bob Member Since: 28 Apr 2015 Location: Yorkshire Posts: 4561 |
Members have done them and even done some reporting back. Not the ideal of time of year now though.
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27th Jan 2019 9:55 am |
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Cherokee Member Since: 12 Jun 2018 Location: Portishead Posts: 76 |
Another thumbs up/vote for Austen at Bell,
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27th Jan 2019 12:13 pm |
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Space Member Since: 26 Jan 2019 Location: FOLKESTONE Posts: 148 |
I will see if I can get there, at least taking the fuse out has cured it for now.
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27th Jan 2019 1:17 pm |
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Cherokee Member Since: 12 Jun 2018 Location: Portishead Posts: 76 |
Trust me & others it will be the best 150 quid you've spent on your FL2
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27th Jan 2019 3:59 pm |
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