Rear End Whine

[BaintonBeemer]

190d 2.5 non turbo auto 166k miles
moderately loud whine from somewhere rear

1. possibly worse on passenger side
2. on movement only, inc when in neutral
3. NOT worse with accel/heavy load
4. noticable when slow, possibly worse on over-run (ie when slowing down)
5. not a problem at high speed
6. Had jacked up on hoist, prop shaft, cv joints and wheel bearings seem ok, not really possible to locate noise or problem
7. moderate play in the whole drive train (say 15o slack)
8. changed diff oil but not difference
9. applying breaks makes no difference
10. no difference when cornering

otherwise car is A1

any suggestions?

Thank you out there

BaintonBeemer

 

[tom7035]

Is the noise exaggerated when the car is exactly at the point where it is neither accelerating or decelerating?

 

[Mid_lfe_Crisis]

i surspect wheel bearings or dif wheel bearings dont allways make a noise when jacked up so best way to test is go round in tight circles in a car park so that one of the rear wheals is travling a long way and one is hardly moving try both ways and see if there is a difrence in the sound maybe get some in the back to listern for you when you are doing the test

 

[Bolide]

Whining 190

Worn diff. Wheel bearings don't tend to whine, they normally grumble


Nick Froome
www.w124.co.uk

 

[tom7035]

I agree with worn diff. pinion/bevel. That's the reason for my question at post No.2. I suspect BB has only just got the car, whine wouldn't appear all of a sudden.

 

[BaintonBeemer]

Thanks folks
will test over/under run balance point
pirouettes in car park
and report back

and yes only just got it, told was bearing and that they were replaced (ha ha), never trust even a friend when it come to cars, noise aside a joy to drive and such a nice engine.
BB

 

[tom7035]

Good luck, but I think the 'pirouettes' in the car park superflous. Rear wheel bearings are parallel and will grumble just as much going straight ahead! (and I wouldn't even consider the likes of 'moly' or whatever in the diff - waste of money and effort).
Cheers, Tom.

 

[BaintonBeemer]

Still whining, but no worse,

know where I might go for a diff repair/rebuild??
ta

BB

 

[television]

Sounds like me to be the pinion bearing normally easy to replace by just dropping propshaft and unbolting the pinion housing, but on the 190 there is a taper roller bearing on the inside and the crown wheel must be taken out, so its off to the diff re builders.

Malcolm