Yesterday my ’98 Jeep Grand Cherokee Laredo 5.2L (with factory tow package/Upcountry suspension package and low-range 4-wheel drive at some 98,000 mi) seemed to be “stuck” in first gear, very “reluctant” to shift out of first even though I was applying only light to very moderate throttle---it would shift out of first if it got to high RPMs and after I then let off throttle. (There was no trailer towing on this drive.) I drove some 20 miles, parked, took care of business for a couple of hours and then drove the 20 miles back home having the same symptoms/performance as occurred during the outgoing 20 miles. Interesting coincidence is that this was my first local drive after my uneventful annual trip of some 1,000 miles of towing with total trailer-and-cargo weight of only some 1300 lbs between L.A. area and around Mammoth Lakes, CA area, from elevation of some 200 ft to max elevation of some 8,000 ft. Jeep handled said trip without any transmission malfunction; I did use speed control, pushing off the “Overdrive” button when speed started to drop when going up steep grades. I’ve owned this Jeep since it was new, had no collisions, have never towed more than 2k lbs, probably towed total of less than 15k miles max over the years, have never done any “Rubicon”-type offroading, and the trans fluid and filter have been changed usually at the 12k mile point, but no later than a 25k interval---and always with the proper “+” type trans fluid. I did have a period some years back where trans appeared to “hunt” up and down from first gear under hard throttle and could find no cause until I found and replaced broken motor mounts ---which finally cured the “hunting” problem. Does this malfunction have a cause and fix obvious to Allpar experts? Is it hopefully perhaps a simple external part change, like some solenoid or valve, or band or other adjustment, or is it time for a teardown, or…? Thanks In Advance, Guys!