I have one that you could consider adding to #18 belt chirp. On my '96 (4.0), I had a chirping belt when cold for a few days so I ordered a new belt and two new idler pulleys from Rock Auto. On replacement day after changing the belt and both pulleys, it still had a chirp when revving the engine. While watching the belt while revving the engine, that's when I noticed the pulley portion of the harmonic balancer moving in and out. Inspection of it showed that it was beginning to come apart - the isolating rubber was bulging out and I could pick it off. Fortunately the local parts store had a new Dorman balancer for $45 and with a short harmonic balance puller, it could be pulled without removing the radiator. I figure the balancer was so cheap compared to some others because it has no reluctor wheel on it since our crankshaft position sensor is located in the bellhousing.

96 4x4 Laredo, 97 4x4 Limited, 97 4x2 Limited