Q&A

 Rookie

No diagnostic code, transmission seems fine ... once while decelerating from 70 and let go of the gas pedal, van dropped 20 miles an hour, whole front seat was in free fall.
It MIGHT have been wind sheer, But also, one time, i was parking, and as i put it in park, i was moved up an inch, and then when I left, and put it in reverse, I heard a CLUNK, like a u-joint, (this van does not have one i found out), but instead of blaming the transmmission or axle, could this be bad fuel?/fuel pump?/fuel filter?/or other fuel related issue?
I have NOT had an issue in the last 3 road trips. Maybe it was bad fuel? I use Lucas fuel treatment.
Thanks for the professional input.

Mike D.