johnnie59 said:
I've been wanting one for years, but always put off getting one as my driveway is packed shell, not paved. Anyone have an idea of how to prevent the truck falling when the jack can't move as you lift?
Look around local construction companies. And concrete companies.
Look for "form boards". They are plywood that is about an inch and a quarter thick.
This stuff is stronger than regular plywood.
Even just two form boards is probably all you'll ever need.
Cut one into pieces to place under your jackstands. Make them big enough to have at least 6 inches out, on every side of the stands.
Use one to place the jack on.
Use these for a while, and you'll get used to how to place them for best effect. (The jack will roll on the plywood. Rather than being stuck in one place. This will prevent the vehicle from falling off the jack.)
For you: Drill a couple holes in one edge of each piece, and use some small nylon rope to make handles. Toss them on the ground and just push them around where needed. Then use the ropes to pull them back out from under the vehicle when you are done.
Your jack and stands will be much better supported, and much safer on these, than on standard two-by lumber.