Here's a how to article related to modifying  governor on the vanagon:

http://www.weidefamily.net/vanagon/

Troy

<<More About That.  A quick lesson from the master learnt me that the shift
points are governed by the 'governor' which like the rotating governor on
steam engines senses rotation and in the case of an AT shuffles the valving
in the valve body to switch gears via the bands and so on.

WOT characteristics of the shifting have to do with a valve that is
controlled by the throttle/accelerator linkage directly.

More can be found from...transaxleengineering@gmail.com or the
website below.

Pensioner>>