The last time I heard this it was on my 04 Toyota sr5 prerunner with the v6, I went to the shop expecting to have a belt changed and it ended up being my crankshaft. Thankfully, that time, I had the extended warranty so I didn't have to shell out the $1800 for basically a new lower end on that Toyota....now to my monty....its a 91 four door and everyone on this forum has been very helpful with the past problems I have had so thank you in advance. When I start her up in the morning for the past week or so she will squeal like a belt is out of wack or similar. The whining or squeal increases with rpm's so when I slow down it gets progressively lower in volume. My drive to work is about 9 miles, by the time I get to work and the engine is at proper operating temp, its gone. I have looked at the belts, they don't seem overly tight or loose. Its obviously hard to determine where the squeal or whining is coming from theres just too many moving parts up there. Anybody ?