- Joined
- Jul 27, 2016
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Last night I had a major failure to the rear differential/haldex and I'm trying to figure out what went wrong and thought that maybe someone could help me that's been in the same situation.
Anyway, two dags ago it all started with me handing the car to a local shop for the yearly service with change of oil, filters, fluids etc but also the oil for the haldex. So far so good.
Left the shop and I drove home and on the highway at around 60 mph I noticed a slight whining noise from the rear, very subtile and it disappeared at like 65-70 and then it was gone. Didn't think much more of it at the moment and also took it for a drive later that night without hearing anything strange at all and it drove just like it should.
Yesterday I went for a little longer trip (about 60 miles) and everything went great until the way home. Only got about 10 minutes in before the whining noise really picked up and it shortly followed by a rumbling noise and then a loud bang followed by total failure of the rear diff and oil on the street.
Obviously something was not done correctly at the shop when changing the haldex oil but what could cause this catastrophic outcome? Draining the diff instead of the haldex by mystake? Filling the diff with haldex oil instead of gear oil? I know that the fill/drain plugs of the haldex/diff is pretty close so maybe they just drained the wrong stuff?
I find it very hard to believe that it's just a coincidence that on the day after someone's been working on the diff-unit the whole thing just pretty much explodes after 2-3 hours of driving.
Any thoughts about this?
Anyway, two dags ago it all started with me handing the car to a local shop for the yearly service with change of oil, filters, fluids etc but also the oil for the haldex. So far so good.
Left the shop and I drove home and on the highway at around 60 mph I noticed a slight whining noise from the rear, very subtile and it disappeared at like 65-70 and then it was gone. Didn't think much more of it at the moment and also took it for a drive later that night without hearing anything strange at all and it drove just like it should.
Yesterday I went for a little longer trip (about 60 miles) and everything went great until the way home. Only got about 10 minutes in before the whining noise really picked up and it shortly followed by a rumbling noise and then a loud bang followed by total failure of the rear diff and oil on the street.
Obviously something was not done correctly at the shop when changing the haldex oil but what could cause this catastrophic outcome? Draining the diff instead of the haldex by mystake? Filling the diff with haldex oil instead of gear oil? I know that the fill/drain plugs of the haldex/diff is pretty close so maybe they just drained the wrong stuff?
I find it very hard to believe that it's just a coincidence that on the day after someone's been working on the diff-unit the whole thing just pretty much explodes after 2-3 hours of driving.
Any thoughts about this?