I rebuilt the shock with the rebuild kit sent by Progressive Shocks not Precision mistake in first post. The same thing happened pushed the oring out the top of the shock. I've called Monroe and Gabriel shocks and were told by both that they didn't have any shock that would work for the trailer application. The tech support for Gabriel shocks told me of a Co. in Colorado that makes custom shock. I'm sending my shocks to them to use the eye and post for a new set of air shocks with a 5 year guarantee. The shocks will be 1" longer with a 4" travel so with some air adjustment I should be able to set the ride height for the best ride. More than I wanted to spend $165 plus shipping, but between CSC and Precision there seams to be no replacement shock available any time soon. CSC says they have been waiting for a year for a replacement shock and don't have any yet. I will post on how the new shocks work after my trip to CA in June.