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      08-23-2023, 12:06 PM   #7
E36M3
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Drives: 97 M3, '14 335i, '12 X3 35i
Join Date: Jan 2018
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If you didn’t have the transfer case guild changed it sounds like the clutches are acting up from old oil. Once you get ISTA it will tell you if it tripped an dirty oil code in the transfer case. If so and you’ve changed it then you need to redo the transfer case reset procedure in ISTA. The only real way to see if the fluid is clean is to suck it out of the fill plug hole since there isn’t a drain. A finger dip in the fluid will only tell you it’s full not it’s condition. Once you suck it out if it is good fluid then it will be golden in color.
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