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      02-14-2026, 06:59 PM   #53
dvrmstrng
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Drives: 2023 BMW X7
Join Date: Mar 2025
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Quote:
Originally Posted by joebu View Post
Wow, great info! He was a BMW master tech before going independent. But he didn't know about the other chamber, nor did I. Thanks for this. I plan on doing the Xfer case fluid regularly. So maybe can do that chamber next time... I'll ask him about the ISTA. He has some fancy diag tools but not sure about that one.

Someone here (you can dig and find it) used ISTA to open the second chamber and got no extra fluid out. Just food for thought.
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