2013 BMW X5 35d twin turbo diesel 120kmi Report is from the factory fill ATF Transmission is a ZF 6hp28x BMW says that you never need to change the fluid, though ZF later made a recommendation of 60kmi OCI's. The results are not pretty.
Don’t blame the engineers. Engineers do the best they can within the parameters set by management, accounting, marketing, shareholders, etc. Guaranteed the bean counters figured there would be few enough failures during the warranty period to call it a lifetime fluid and reduce the “total cost of ownership” equation that marketing can hang their hat on. So many of the questionable instructions coming from manufacturers have very little to do with engineering. Yes, I design things for a living.
Originally Posted by Ram02
But but the engineers said it’s a lifetime fluid and we should listen to them they designed the vehicle
No 1: "Abrasive and other contaminant levels were normal". - To me this means that filtration was good and the fluid wasn't bad.
No 2: The comments about torque converter, gear & bearing wear suggest that the unit might not be a perfect fit for the application and no amount of fuid changes are going to prevent that wear. Also the analysis says "higher than normal". Well, how much higher than normal? Are we talking a little bit or a lot? What is their population of ZF6HP's? Is it comprised of trucks (Ford) or light weight sedans (3-series, A4 Audis)?
Still, 120k miles. Change and keep on rolling.
Last edited by BMWTurboDzl; 03/26/2006:54 AM.
“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”
Re: 120kmi factory fill ATF ZF 6HP28X 2013 BMW X5 35d
Bmw used to say lifetime fluid on the pans, but on the workshop sheet it called for oxygen sensors and atf change at 100k, so they assume 100k is the lifetime of the vehicle. This interval went away in 2008 or so
2002 VW Golf TDI-T5 10/30 2007 Mercedes GL320 CDI-T6 5/40 2005 BMW M3 BMW-Twin Power 10/60 2003 BMW M5-M1 15/50 1998 BMW M3/4/5-M1 10/40