Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: BigCat on 22 September 2010, 10:54:48

Title: Rear end vibration
Post by: BigCat on 22 September 2010, 10:54:48

Hi everyone,

Just back from our ninth trip in VOO to southern Italy. She's developed a rear end vibration at high speed, any suggestions?

Other info, high mileage (205K), front bushes all replaced last year, one rear bearing replaced last year, New tires all round (Michelin Primacy 99 rating)

Title: Re: Rear end vibration
Post by: cem_devecioglu on 22 September 2010, 12:47:44

personally I can think of rear wheel balance..

and its possible that one of your wheels may be buckled during the long trip..

ps: new tires can also change position during hard braking..

Title: Re: Rear end vibration
Post by: PhilRich on 22 September 2010, 14:34:51

Swapping the rear wheels for the fronts will narrow the options. 

Title: Re: Rear end vibration
Post by: markfree on 22 September 2010, 14:38:45

Apart from tyres your rear-end vibration could be :
   worn prop-shaft universal joint
   bent or un-balanced prop-shaft
   worn constant velocity joint
   bent/distorted drive-shaft.

Have you driven over something which hit the under-side and could have caused the above? :y

Title: Re: Rear end vibration
Post by: Kevin Wood on 22 September 2010, 15:29:07

Could be propshaft centre support bearing too.

If it's only evident at motorway speeds I'd tend more towards wheel balance. Props normally are more evident at around 30-40 MPH IME. You never know, though.

Kevin

Title: Re: Rear end vibration
Post by: BigCat on 23 September 2010, 09:22:33

Thanks for the replies, the car is with the mechanic now, but he's not an Omega specialist.

Tailshaft is the obvious one except that it only comes in at high speed. Also, it's more pronounced with a heavy load.

I don't know how the rear suspension works and if there are any bushes to check for?

It definitely only started on our return journey i.e. within the last 1.5K miles.