Shock Absorbers

I have a 2004 Excursion with a 4 in. Pro Comp. suspension lift, bought it this way. The front shocks (Pro Comp) started leaking oil so I replaced them with Rancho RS5264 shocks, they are now leaking oil. I called Rancho and their tech said I probably have the wrong part number shock installed, but the RS5264 is listed for my app. I would like to replace all 4 corners has anyone had any luck, my problem is most of the companies offer fronts and not rears.

I called Pro Comp Suspensions this week and the Tech I spoke to told me the problem with the shocks is being caused by the lack of a bump stop extension. These parts are now on the way to the house. I was also told to make sure any suspension parts are for an Excursion and "not" for a F-250, the springs are not mounted in the same location. I hope this solves my problem and maybe helps someone else!

I received the new Bump Stops today in the mail. They were the wrong ones, for the rear not the front. I immediately contacted Pro Comp Suspension and talked to a different Tech. The new Tech. confirmed they were the wrong part # but also told me the blown shock problem is "not" being caused by the Bump Stops. I was told to run a heavier shock? I am at a total loss, at least the Rancho Shocks were under warranty and have been replaced.