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Old 10-22-2021, 06:31 PM
E53Envyy E53Envyy is offline
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Popping sound when accelerating

We’ll guys I finally fixed the issue!

It was the transfer case!!!

When I cracked her open the chain was flapping in the breeze. I decided picking up a used transfer case would be the easiest option and I had it back together in short order.

A couple notes if anyone has to do this job:

- On the ATC500 transfer case you cannot see if the chain is loose through the drain or fill hole.
- access to the torx bolts is much easier then on the NV125.
- Remember to buy the DTF-1 fluid, it’s expensive!

Here’s a good video on disassembly:

https://m.youtube.com/watch?v=M_qKif-KXGo


From my knowledge not many x5’s have had this issue. Knowing that my X has the tow package leads me to believe lots of heavy towing from the previous owners caused the failure.

Thanks everyone for the help! Really appreciate it!



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2005 4.4 x5
2004 330ci
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