Well, I just got back from a camping trip in the 2.5 and noticed a squeal at idle when i started her back up. I got under the truck and noticed the dreaded harmonic balancer belt wobble, too. I tigethed it up as much is it could go to ensure it doesn't slip but she will be parked until I can get the replacement parts in. I couldn't find the part on the list, but here it is with links:
Reference MB990767. My tool is designed to fit the 6G74 engine. -MB990767". This tool is made from steel & hardened stainless steel pins, and proudly made in theUSA. Also, another version which has about a 4" spacing between the pins.