Have a stock 97 F350 SRW with E4OD on which I do mostly basic maintenance & repairs since I’m not as experienced, knowledgeable or skilled as many on this forum seem, but I appreciate gleaming insight from everyone here & trying things; thanks. The other day it snowed, & I locked my manual hubs & tried to shift into 4x4 high, but the lever would not move. Have since sprayed WD40 on all visible arms / connections around the transfer case 4wd shift linkage for several days hoping to loosen up rusted points to lubricate them, but there is still no movement. Have not tried to remove the boots on 4wd shift linkage to see what it looks like inside of them; is it more likely that the problem is in there? Is it likely that the transfer case 4wd shift linkage needs replacement, or is it just something that needs grease; could the problem be something else? The 4x4 worked well during the blizzard last February in Chicago, but I later had some health problems causing the truck to sit outside (not driven gathering rust) several months. Would appreciate any thoughts, suggestions, ideas or pointers anyone has to offer. Probably will not be able to look at it / work on it much until the weekend or possibly next week since the truck is outside (no garage) & since my work schedule is during daylight hours. Thanks again for any experience or insight you can provide.