First thing I'd have checked is all front and rear suspension pieces. The rear trailing arms rot out, wear out, which will make rear end swishy feeling, not planted. We're here to help - please call us at 1-800-358-4751. I got confused on one part in regards to lowering the axle so I wish they were a bit more detailed in that section. Product is good quality, doesn't make any noise, and I like the fact that they bolt in so that I don't have to worry abo. Please review the vehicle options and installation notes, to ensure you select the correct product for your Ford Expedition. Good product but I wish the spacer would have keyed in the strut instead of just relying on the strength of the bolts.
Second you might have a bad front tire or 2. Go over it from front to back. . I only had to use the aluminum spacer on the bottom of the strut assembly to achieve the results I was looking for. The high lift doesn't help, but you've obviously got suspension issues. Listed below are the Leveling Kits that are designed to work with the 2004 Ford Expedition.
If wider tires are used, offset wheels will be required and trimming will be required. Need assistance selecting the right Readylift Suspension, Inc. Sent from my N9131 using Tapatalk. Beyond that their could be a crack in frame causing this. Usually an alignment shop worth their salt will do this before checking settings.
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