Chirping sound from bellhousing area
 

I have a 2002 4WD Blazer with 120,000 miles on it. I'm the second owner and it has gotten excellent maintenance.

The problem that I can't solve is: After driving for about 15 minutes it begins a loud chirping from the area of the bellhousing. It's a constant harminic wheather i'm driving or stopped. wheather I increase RPM or idle, in fwd-neut-or reverse, in 4WD or 2WD. I've changed fluids and filters. I've had it on a lift and verified that the sound is coming from the lower end of the drive train.

Any ideas would be greatly appreciated, it's driving me nuts.
:icon_shrug:

while it was on the hoist, did anybody drop the torque converter cover, and inspect all of the flex-plate? i came across a very similar situation on my best friend's Dad Astro van.

turned out to be a cracked flex-plate.

you'll probably need to unbolt the TC, and slide it back, so you can properly inspect the flex-plate.