hi new guy on the block need some help have a 98 150 ext cab have not used truck for a couple of months when i was going to use it the gear shifter and the leaver for the 4x4 were rusted stuck sprayed the linkage with wd40 worked it loose but no 4x4 checked vacuum to selonoides was ok checked acuator and fork both were ok still very hard to shift in and out gear woundering if shift leaver sensor or g.e.m modular can be causing it not to go into 4x4 also checked trans range sensor in front of transfer case little ball moved in and out easy any help would be great oh front drive shaft is engaged and no 4x4 lite on dash

 

I moved this to the appropriate section.