May 14, 2018 at 4:32 PM
Welcome - You didn't say the year of your Excursion.
If you have the older 7.3L PSD engine you're fortunate. If you plan to do heavy towing, and have the 6.0L, you may want to consider some "Bullet Proof Mods" for your engine.
Most Excursions suffer from wandering steering due to "soccer mom suspensions" when Ford deviated from solid F250/F350 suspension designs. One fix is the F250 leaf spring swap is listed in this forum at this URL
http://www.supermotors.net/clubs/fordexcursions/registry/9/54681-2
MILVETS Living The Life In Southeastern AZ's High Country
PSD F350 Dually CC LB, PSD Excursion. Jeeps JKUR and CJ-5, Subi Outback AWD.