When I start it up in the morning I hear a squeal that shortens in length over time and goes away after about 3 minutes. Any idea what this could be? I checked the belt. Also I have been noticing an occasional clutch smell sometimes. It smells like a burning clutch but the clutch seems to still be working ok. Is it going out or could it be something else? It is a 98 Tacoma 4x4 2.7l with manual transmission. It has about 150k miles on it. Any help would be appreciated. Thanks for your time.