Hi guys, this is my first time postig here. Here is the problem that I encountered on my car:
I kept hearing a whining noise as I accelerate so I suspected the front wheel bearings. I replaced them and installed new disk brakes and pads for good measure. The noise did not go away.
I changed the fluid for the differential and no noticable improvements. Today I jacked up the car from the rear, put the car in drive and stuck a brick on the acelerator. When I went under the car I heard the noise coming from the front part of the differential. It was howling like mad.
What do you guys think? pinion bearings? the whole differentail or both? what's one to do? is the bearing easily accessible to be replaced by a mortal or I should look for a new or rebuilt differential unit?

Check the flex discs, those are the couplers on the front and rear of the driveshaft, and also try to check for slop in the midship bearing, that's the bearing that supports the center of the driveshaft, it's a 2 piece driveshaft. That'd be alot more common than the diffy dieing.

Gilly

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Thanks for the reply. Do you think it could be the driveshaft support bearing or the flex disc?
How will I know for sure? I am guetting confused as I thought I heard the noise right where the dif. is. Yes, the flex disc is right there too but how would that one contribute to the whining noise? The midship bearing if it means the driveshaft support bearing I think I can understand that it could and that noise can travel in funny ways. I put a stetoscope against the differential but I could not make out anything as I heard nothing. So maybe you are right.

<<>I put a stetoscope against the differential but I could not make out anything as I heard nothing. So maybe you are right.>

Put the steth on the center bearing cage and you will know immediately..

The best scope to use for these noises are the ones with the metal rod on th end....

It was the differential... Sorry for the delay.

A six year delay and I thought I was a slow worker.

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Since 2005....

Math-challenged.

By the way, did you ever finish filling out your application for membership in the Procrastination Society?

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

That was a post for the 560SEL. I sold it almost ten years ago, now I wish I didn't!