When I try to drive up my ramps the just move forward, after removing the bottom plastic cover below the engine, I lifted the car, then lowered it onto the ramps. Back 15 years ago, My dad had a concrete floor in the barn where he stored his tractors. He added a bucket to the front of the tractor, and the weights got removed. I was able to put the tractor weights in front of the jack stands, and that held them in place. The only thing I can think of is to drill a hole in my garage floor, mount a bolt and use that to hold down an angled piece of metle which will hold back the ramps. That is a bit drastic, but it is the only alternate I have came up with, other than purchasing a lift, and if I had that money I would have got the R/T.