240 General: Transmission whine.. sort of

[Johnny64]

My Torslanda has developed a 'whine', particularly when the weather is colder. Ive coasted in neutral and the pitch goes up and down with road speed not engine speed so i'm guessing its NOT transmission but from the wheels. It seems to come from two sources as i'll get two separate pitches of whine that come and goes. After all the rain and floods and mud on the roads is this likely to be something as simple as wheel bearings? I dont think its the brakes, ive looked at those and they are clean of grit and dirt. Any ideas or opinions? i'm very grateful for sharing your fantastic experience and advice!

[Bugjam1999]

Propshaft centre bearing is my guess- has it been replaced ever?

Simple and cheap to replace diy if you don’t mind getting under the car and removing the propshaft.

Othen replaced the bearing on his previous car and shared photos of the process in his progress thread.

Cheers

[Othen]

Originally Posted by Bugjam1999

Propshaft centre bearing is my guess- has it been replaced ever?

Simple and cheap to replace diy if you don’t mind getting under the car and removing the propshaft.

Othen replaced the bearing on his previous car and shared photos of the process in his progress thread.

Cheers

https://www.volvoforums.org.uk/showp...postcount=1888

[Bob 1967]

Mine developed a whine when the gearbox mount went, it put extra pressure on the prop shaft.

[Clifford Pope]

Jack the car up so you can get underneath and lower the bearing crossmember to release the rubber doughnut holding the bearing. Spin it to see if it is the culprit.

Often all it needs is a bit of oil injected behind the plastic shield protecting the rollers.

[Juular]

Interesting, what speeds do you hear this at?

Mine has just begun whining away. You can hear it almost from a standstill, then it gets loud at 40mph then goes away.

I initially thought it was a front bearing, but those were done less than a month ago, and to be honest it sounds too 'whiny' to be a wheel bearing.

[Johnny64]

Originally Posted by Bugjam1999

Propshaft centre bearing is my guess- has it been replaced ever?

Simple and cheap to replace diy if you don’t mind getting under the car and removing the propshaft.

Othen replaced the bearing on his previous car and shared photos of the process in his progress thread.

Cheers

Thanks, yes that was my initial thought and its not been done to my knowledge. Its something i will investigate

[Johnny64]

Originally Posted by Juular

Interesting, what speeds do you hear this at?

Mine has just begun whining away. You can hear it almost from a standstill, then it gets loud at 40mph then goes away.

I initially thought it was a front bearing, but those were done less than a month ago, and to be honest it sounds too 'whiny' to be a wheel bearing.

That sounds very similar to mine; comes in quite suddenly around 10mph and increases in pitch till about 40mph then goes quite suddenly. the frequency of occurrence and volume reduce as the journey progresses. As i said, it seems to come from the front passenger side and also the rear drivers side, coming and going at slightly different times and pitches. Neither are loud but my wife said it sounds like jet engine kind of sound or like a turbo.. but there is no turbo on my car..

[Johnny64]

Just a thought. I have van tyres on my 240 (much much cheaper than any other option and fine for my type of use- lanes, country A & B roads) which are of a harder compound.. could it be tyre whine like on some 4x4s with bigger, more knobbly tyres.. particularly as it seems to go away further into the journey or/ and when the weather is milder..?