+1
What I would do and what I DID, mine was only flushed at 40k at the dealer. I did multiple drain and refills throughout the year.
Here is what I recommend:
- Get a gallon of Supertech ATF from Walmart, $10 gallon jug.
- Remove the Drain Plug on BOTH and the pan and differential(if its too tight I wouldn't worry they share the fluid)
- Refill and drive for a week, repeat the process. Then after two weeks drain again, and repeat process.
- After another two weeks drain the differential, drop the pan, clean it, replace the filter(get a Wix filter kit from Oreily) and refill the transmission with a synthetic fluid like Valvoline Maxlife ~$4 a quart from Walmart also.
This should get the fluid clean and red, continue the drain and refill process at every other oil change until it stays red and clean. Then you can be the judge of whether to continue doing every other oil change, if its working, do a drain and refill every 15k.