if the light doesn't come back before monday , i would call and cancel . the mechanic's not going to find anything and he's got no where to start looking if there's no driving issues. I think your dealer knew EXACTLY what was wrong and was trying to get your good word and trust to come back using the old scare tactics of an expensive replacement . Don't suppose they told you what the actual code was that caused the service 4wd message to come up did they ?
Proud owner : 05 WK Ltd 5.7 HEMI
90 YJ Islander 4.2 Cam'd & Decked
94 ZJ Ltd 5.2
00 WJ 4.0