I raised the right rear wheel off the ground and the only thing I could hear making noise when I spun the driveshaft or wheel by hand was the carrier bearing assembly. No noises came from the direction of the rear end. I am on an incline so I couldn't start it.

Does anyone know where I can find a list of casting numbers ? This engine is a 1989 and is supposed to be a 2.9, has casting numbers on it of 89 and C8S1a and appears to be cast iron instead of aluminum. Hmmm, does that mean I don't have to buy new head bolts ?