how often should one change the trans filter in the 2006 6.0l? It looks like there is a remote filter under the right side front bumper? and i guess on in the trans itself?

 

Just bought my filters for the fuel and trans. Dealer said 20.000 on the fuel and 25 or 30 on the trans. I think I will do the change at 20.000.

 

Well your dealer needs to read the 6.0L manual.

Fuel filters are every 15,000 miles unless they need changing due to poor performance or low fuel delivery pressure.

Transmission is every 30,000 miles and many do a flush (not just drain and refill). For those that do heavy towing, they seem to be in the 20,000 - 25,000 mile range for tranny flushes and filter changes.

So... your dealer is correct on the tranny and incorrect on the fuel filters... its all in the manual.