Originally Posted by Emory39

Hi,
I am just sharing this website I found while researching the ZF6HP26. I mostly agreed with all that's written here, not bad information and could serve as good basic knowledge about the transmission. I did a solenoid kit/fluid service at 85K because of bad shifting also change the seals that connect the valve body to the clutches. I plan to keep this X5 for more years; next tranny fluid service is at 145K I might do the Zip kit that they talk in this post to keep it up to date. About 28K more to go till then. Anyways hope this help clear out any doubts you might have about the maintenance about the 6HP26 Everything about your ZF 6HP26, 6HP19, 6HP28 transmission issues | BMW LOGIC7