If the shift patter for the transfer case is:
then it needs to stay in 4FT for everyday street driving. If it is hopping when taking sharp turns or when doing figure 8's, then the viscous coupler inside the transfer case has gone bad. It's about $300 for the part, but should last another 100k miles or so.
You can also remove the front drive shaft until you get it fixed, BUT you must have a 96+ to do this otherwise it can roll in park.
If the shift pattern is different than that, then you should have a 2wd option you can use. (you can swap transfer cases
, but it's more work than some people want to do).
Not sure about the blower motor issue. Maybe someone else will chime in on that one.