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Thread: 2001 5401 6 Speed Differential Leak

                  
   
  1. #1
    Junior Member
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    May 2007
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    Bethesda, MD
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    2001 5401 6 Speed Differential Leak

    Doing a Preventative Maintenance inspection myself (rather than having a dealer do it, as in past, I found this seepage-leakage (glistening brown area) in front of, and above, the point where the drive shaft is joined to the differential. Car has 104,200 miles.


    Oil level seems OK (dribbles out when filler bolt loosened), but I would welcome any advice on whether this is a sign of something to be repaired, replaced, ignored, whatever...Many thanks...

  2. #2
    Senior Member
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    Jul 2004
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    I wouldn't worry about it, might only be grease from the CV driveshaft, from centrifugal force, the front diff. seal area looks drier than the shiny area. The side axle seals are much easier to replace than the pinion seal, just watch the diff. oil level, I've never seen a catastropic diff. oil loss. Bob

  3. #3
    Junior Member
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    Jan 2008
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    I would clean the area so you can check how quickly it leaks and where it is coming from(carb cleaner works well).

  4. #4
    Senior Member
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    Jul 2004
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    If it's the CV joint, you should make sure there's adequate grease in there.
    2006 GMC Sierra 2500HD 4WD Duramax LBZ/Allison 6-speed
    2002 BMW M3 - Alpinweiss III/Black
    1999 323i KP/GTS2 - Alpinweiss III (Black Hood, other stuff)
    1990 325is - Brilliantrot/Tan
    1989 325is - Alpinweiss II/Black (S50B32)
    1989 M3 - Alpinweiss II/Black (S62B50 in progress)



  5. #5
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    Many thanks...

    Appreciate all three recommendations, which I will follow...

    All the best...

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