So a couple of issues the past few months, 2004 expedition 4x4, 5.4ltr. eddie bauer on air ride...my back shocks are extremely bouncy and need to be replaced. i recently went to NY and the below freezing weather started to make the air suspension go nuts. When the truck is off the front end slams down, the pump works when its running but air suspension light comes on and ride is like a roller coaster. Like I said pump is basically allways running to pump up these shocks. I've done some research and found some shocks & spring conversions for a range of different prices. What I need help with is it worth going to convert them over to springs....especially since I will be moving back up to a colder climate eventually, and which conversion kit is the best for my buck?????????? PLEASE HELP, Iam abou to buy these shocks/springs and get em swapped out ASAP!!!