Symptoms - do I have bad half shaft universals?
I think I posted about this a long time ago and I finally just got around to starting my diagnosis. Basically, I heard some noises a while back and instead of guessing and fixing something that wasn't broken, I figured I'd wait until it broke so I was certain. I think something is now on the verge of breaking and I need help with the diagnosis. It's an automatic 1987 C4 coupe with 95,000 miles.
It started with a squeak in the back left wheel. The squeak seemed to get faster as the wheel moved faster. The squeak sounded like a metal friction squeak. As time went on, the squeak got louder and louder. The other day, I'm driving and I hear almost a bang under the car and then a loud grinding noise that seemed to come and go. Fortunately I was only a mile from home and slowly got it back. The grinding at some points almost sounded like something was hanging off the car and dragging on the ground. I got home and looked and nothing was hanging off the car. The noise happened when I was driving straight but got really loud around my last slow uphill right turn into the driveway from a stop.
Today, I got the jack under the rear differential and got the wheels off the ground. I released the parking brake and shifted to neutral. I slowly turned the wheel by hand and I hear the squeak in one particular spot. Also, as I hear the squeak, I hear a rather loud click sound that I don't hear on the other wheel. The sound seems to be coming from the wheel side of the half shaft.
I'm thinking universal on the half shaft or a wheel bearing. Based on my description, does anyone have any ideas or things I can try to narrow in on the possible problem?