I have been getting a definite vibration and grind/rubbing noise at low RPMs in my D2 that at first I thought was transmission related. The vibration usually stops after getting over 1500 to 2000 RPMs, but the grind/rubbing stays usually only when it hits overdrive or just starting off. I stopped by a mechanic and he gave it a test drive and showed me my harmonic balancer was wobbling. I am going to take it to get fixed but I am terrified that the grinding noise that I am also hearing is more than just the harmonic balancer.

Does anyone have any experience with this? I found a harmonic balancer on ebay taken off of a 02 D2 with 79,000 miles. I am thinking of buying it for 100 dollars, I would hope this is not a bad idea.

What else could possibly be wrong with my D2 after he takes the balancer off? My luck always seems to lead me to bigger problems, so I would like someone to tell me what I am in for.

Here are the pictures of the harmonic balancer that is for sale on ebay....

 

How many miles on your truck?

 

FYI: Inspect Harmonic Balancer: The harmonic balancer on your engine is used to help silence engine vibration by utilizing a rubber mounting metal ring attached to a hub that is connected to the front of the engine. If this ring becomes dislodged because the rubber insulator has failed it will allow the outer ring to bounce and scrape on the rotating hub. This condition will produce a scraping noise that will change with engine speed. To check for this condition remove the multi rib belt and check the harmonic balancer condition. If the outer ring is lose replacement is required.

I think your mechanic is on the right track. Have him remove your balancer and inspect it. If it's bad, I think I would consider a new one. That one is already developing surface cracks on the rubber insulator. Plus it'll be your mileage minus 79,000 miles away from failing again. How much is a new one?