Forgot to mention that there is a 4 series loader on the front - 422?...if that adds any helful info.
If you have soemthing heavy on the back, it might fall in a matter of a half day or a week. With nothing on the back, they should not drop.Well, maybe this won't stump the crowd - it is not normal for the rocker arms (raised) to drop when the engine is turned off is it?