If you're using the Losi Mini-T Racing Shock Set (#LOSB1110), they have had a reputation as leakers. However, they can be fixed easily. I am running them right now. If you bought them new, there is a simple thing to do before you assemble them. Feel around the bevel on the bottom of the shock body. You may feel a little mold burr. Just smooth that off with some extremely fine sandpaper. Then, when you go to assemble the shocks, add a second seal to the threaded section. As you tighten the shock cartridge into the body, make sure the seals stay aligned and don't pop out in one place. Then make sure you tighten them down good and they should not leak. Worst case scenario? Use 1 wrap of teflon tape on the threads. That will solve it, too. Even though they have a rep for leaking, with a tiny bit of work you can get them sealed up just fine. And they are a huge improvement over the stockers. And better than a lot of other aftermarket shocks out there.