Phil,

IIRC, the jack base is designed so that it can 'rock' to the optimum position as you lift the van. 

When you insert the jack with the base slightly pushed under the lifting head towards the center of the van. As you lift, the main shafts should start to become more vertical as the vehicle is raised at an arc. 

If you stabilize the bottom, the jack base will tend to push (slide) out from under the vehicle as you lift.

BenT
sent from my electronic leash

On May 20, 2012, at 6:20 AM, Phil Menchions <pwmenchions@HOTMAIL.COM> wrote:

> Speaking of jacks. Can someone tell me if they originally came with a separate square shaped rubber like pad to stabilize the foot of the jack?
> The foot of mine is curled up on two sides and is pretty dodgy to use. I have to make sure I'm on a perfectly flat surface and the wheels are well chocked. Some sort of "stabilizer" would come in handy.
> Phil