Alright ive noticed a lot of people have these problems but before i jack it up i would like some opinions, Its a 2004 F-150 Lariat 4x4(Shift on the Fly) and ive had it for a little over a year and used the 4wheel last winter and it worked just fine but have not had to use it since then, but now when i put it in 4wheel the transfer case goes into 4hi and 4lo just fine and it appears on my dash, the shaft on the front end spins but the tires do not, i replaced the IWE Solenoid and that did not fix it, and from my understanding there is an actuator for each side of the front end, What are the chances of both of them going bad at the same time? Or is it if one goes bad and does not work correctly the other one malfunctions as well? I would appreciate any help