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Home > General > Haldex failure within 80 miles of Diff overhaul. Coincidence |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4952 |
Haldex fluid is very light in colour and runny - very different to EP used in the EP80w90 used in the rear diff Jules |
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14th Jul 2021 3:34 am |
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Ingenious-al Member Since: 20 Sep 2020 Location: Berkshire Posts: 37 |
Thats what I thought. It was almost certainly Haldex fluid I saw. |
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14th Jul 2021 6:05 am |
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Andy131 Member Since: 09 Dec 2009 Location: Manchester Posts: 2175 |
Just a thought. pinion seal fails, this allows diff oil into the haldex. Diff oil is thicker than haldex fluid, so haldex pump is going to deliver greater pressure at lower pump speed locking up the haldex far earlier.
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14th Jul 2021 9:43 am |
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Ingenious-al Member Since: 20 Sep 2020 Location: Berkshire Posts: 37 |
In theory if the pinion seal is leaking there should be signs of this dripping from the drain at the bottom of the diff housing as there is a small gap between the double walled seal that allows any leakage to drain from a small hole rather than getting in to the Haldex or Diff.
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14th Jul 2021 12:01 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4952 |
I'd certainly check that they know about the quirky filling procedure. Jules |
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14th Jul 2021 2:12 pm |
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Dave47 Member Since: 31 Aug 2014 Location: Margate Kent Posts: 1331 |
After a lot of searching of various user groups I've found a few other cases of people with similar experiences. At least a couple of them were cured simply by draining the Haldex and refilling again being very careful to follow the correct procedure (allowing it to run for 5 mins, topping up again, then removing 70ml). I'm wondering if it was overfilled. Or that some crud has found its way into the solenoid valve that regulates the pressure.[/quote]
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14th Jul 2021 2:50 pm |
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merlinj79 Member Since: 13 Aug 2019 Location: San Diego Posts: 315 |
Might have been some crud go knocked loose during the drain/refill, more plausible if the haldex had never been serviced before 100K. Hopefully another drain/fill will take care of it.
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14th Jul 2021 2:54 pm |
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CED Member Since: 05 Apr 2014 Location: leverington Posts: 233 |
As a complete novice regarding these matters I feel I must be missing something. All this faffing about filling and draining is not going to be done on the production line. There must be a set amount of oil to add , end of story. Please correct my thinking. |
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14th Jul 2021 3:44 pm |
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Ingenious-al Member Since: 20 Sep 2020 Location: Berkshire Posts: 37 |
I think the issue when adding oil during a service is the amount of fluid that likely remains in the pump motor and clutch pack that may or may not fully drain. So there will be some uncertainty over the total volume in the unit.
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14th Jul 2021 3:52 pm |
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Arese Member Since: 09 Jan 2012 Location: Casablanca Posts: 397 |
Happened to me ... Haldex failed (judder ...) after LR dealer changed the rear diff. |
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15th Jul 2021 12:37 am |
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Dave47 Member Since: 31 Aug 2014 Location: Margate Kent Posts: 1331 |
This is My Haldex after Austin at Bell Engineering had stripped it down, after 5 years since last clean you can clearly see the oil breaking down.
DAVE. |
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15th Jul 2021 8:01 am |
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Landy64 Member Since: 15 Sep 2018 Location: South Yorkshire Posts: 30 |
As a complete novice here and reading this post i am confused.
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15th Jul 2021 2:02 pm |
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Dave47 Member Since: 31 Aug 2014 Location: Margate Kent Posts: 1331 |
Same here.
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15th Jul 2021 2:56 pm |
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Ingenious-al Member Since: 20 Sep 2020 Location: Berkshire Posts: 37 |
Update.
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17th Jul 2021 5:11 pm |
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