Roaring/Rubbing noise from rear when cruising/not accelerating.
I tried to search this out but came up dry..
Ive got a little '93 318is, 5 speed, 144k miles. Just bought it about a month ago.
Drove fine when I first got the car, but a couple days ago I was headed to work and noticed a roaring sound from the rear. It ONLY makes the sound when I'm not accelerating. If my foot is on the gas, its fine.. The second I let off, it starts. Ill try to describe it in detail below. Very minor at first but got a LOT worse very quickly. By the time I got the car home that night it was pretty bad. Haven't driven it but twice since, noise seems to get worse every time I drive it.
My first thought was wheel bearing, but I want to be sure. Im on a budget, I dont want to spend money fixing something thats not the problem.
Anyway, as I stated, the noise is ONLY present when cruising or decelerating, its a roaring sound that SEEMS to be coming from the rear driver side, but thats not 100%, just sounds more like that side than the other. Noise seems to be present at any speed over about 5-10mph. I hear it pulling out of my parking lot.
I jacked the car up and did a basic check on the rear wheels, both are solid, no wiggle or movement to them, I know thats not a dead indicator, but it was worth a shot. Also replaced the diff fluid while I had the car up (it has a very slow leak, I figured Id knock that out as a possibility while I had the car up). Obviously, changing the fluid did nothing. I also tried to spin the tires by hand while the car was up but didnt notice any sound(s). Brakes look great, they must have been replaced not long before I got the car.
Any suggestions guys? Am I right in thinking wheel bearing? Any help would be much appreciated, Im scared to drive it like this and I'm currently without a car!