I posted last winter about a whine (on really cold mornings, more like a howl) from the driveline until the car was warm. I pretty much figured it was the driveshaft center bearing (we couldn't get any sound when the wheels were turning on the hoist, so it was best guess).

Late this summer I started to get it in warm temps... would come and go at slow speeds, but come back steady at about 50 mph steady unless I increased speed.

BUT: it didn't seem to be coming from the back of the car.

Finally on Saturday I had my wrench do the center bearing and carrier. At first I was happy happy clap hands... seems like low speed whine is gone. Seemed like the center bearing had done the job.

Sunday I took it out on the highway. The higher-speed whine is still there.

It sounds like a differential whine, 100 percent, but does not seem to be coming from the back seat area.

I assume there is a rear output bearing on the transmission. Would it make such a sound, going bad?

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22