In a message dated 1/11/02 6:43:17 AM Pacific Standard Time,
ChrisS@INFORMS.COM writes:

<< You're rear end will come around but only if you are on a curve or the road
 has a pronounced crown.  If you are in a straight line and the road has
 little or crown the vehicle will remain straight.  Why?  It has to do with
 angle of momentum as it relates to angle of the force resulting from rear
 brake application.  The resulting vector, while traveling in a straight
 line, is more or less perpendicular to your direction of travel. >>

Chris,

If your wheels are not properly aligned or you have the steering wheel off
center, you will find that you will not be traveling on the straight and
narrow. It can also happen when your rear drums are not adjusted equally.

I will post in this forum once I install my proportioning valve. Please do so
likewise if you beat me to it. There is a good chance at that.

BenT