Dirty ATF

[hamelyak]

My ATF gets dirty quick. My full change with both filters was at 75K and it still looked dirty. At 77K I flushed it out with 7 gallons of ATF. Very clean after that. But now at 81,00 it looks very dirty again. I use synthetic, and I hear it "browns" quickly, but this quick? I didnt have this issue at 20k, it would look good for at least 10k. I hauled my 34' fth wheel once for 250 miles after my last change. Any ideas or is this normal?

[jbplock]

Others have reported black or very dark tranny fluid .. are you running performace booster?

More info ...

DARK TRANNY FLUID? (http://72.22.76.69/tdpforum/showthread.php?t=18394&highlight=dark)

Allison burned fluid normal? (http://72.22.76.69/tdpforum/showthread.php?t=18830&highlight=dark)

:)

[hamelyak]

Thanks for the links, they sound similar. I dont have any booster, engine is stock other than air filter, oil bypass, and fuel filter. At my 70K change the oil was black like the others reported on these links. From day one, ext filter gets replace every 10k, oil and internal once a year (~25k) so its not been neglected. Oil temp never get hot or out of range.