I changed mine at 177k miles, and it had never been done. I dropped the pan, changed the filter and topped it off. Be sure the transmission is warm and as level as possible. Today, I'm at 179,030 miles with no issues. whatsoever. I have since drained it and refilled it one time since the initial service, and I've got 10 quarts just waiting to go in. I could not believe how dirty it was, but a drain an refill on removes 45% of the original fluid. So, it's like adding water to mud. The second time I could tell a difference in the color of the fluid, but I suspect it will take at least 2 more times to get the majority of it replaced.

I've been wanting to drain and refill the transfer case as well, but I've read you can damage it if you don't reset the adaptive values. I'm sure the $tealership would be requesting $300 to do the service, so I may just drain and and refill it and take my chances, it can't be worse than leaving 11 year old fluid in it.

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740iLDUKE
01' DINAN 7 S62 Swap - Stratus Grau
(1587 produced in SG 440)
02' 4.6is DINAN X5 S2 Supercharged
833/3258 produced | 1/27 Dinan X5's