Whining on acceleration

[Kristina Coulson]

My rav whines when I accelerate above 40 miles an hr is when it usually kicks in, it's intimitant but alot ,, any ideas welcome before i pay a fortune for exploration work

Rav 4 2012 2.2 diesel 

[philip42h]

It might help if you could provide a little more detail:

• Can you describe the 'whine' in any more detail?
• Where does the sound appear to come from - front, back, left, right, in the engine bay, under the car, inside the car or outside the car?
• You say "when I accelerate above 40 miles an hr " - which is it - when you accelerate or when you travel at speeds over 40 mph?
• You say "it's intimitant" - does it appear at 'random' times or is it consistent and reproducible?
• Can you confirm that your RAV4 is AWD and is it manual or automatic?

[Kristina Coulson]

Hi sorry ,, I suppose it all did sound alittle vague,, so the whining starts once I get to and over 40 miles an hr and by intimitant I mean it's there pretty much all the time but varies in pich ( sometimes it sounds like it struggling more than others- no specific pin point) I have no loss In power and no lights on the dash . When I take my foot off the accelerator it's stops completely changing gears braking , stopping etc and as far as where it's coming from well just infront of me I guess so the engine area , it's manual 

[Bper]

Hi Kristina,If you notice a whining noise coming from your Rav4, especially when you accelerate past 40 mph, it could be linked to issues with the differential. The differential is essential for distributing power from the engine to the wheels, allowing them to rotate at different speeds. When the gears or bearings within the differential wear down or aren't adequately lubricated, they can start producing this whining noise. This sound tends to amplify with increased vehicle speed and may fluctuate depending on how much strain the vehicle is handling. Sometimes, you might perceive the noise as originating from the front of the vehicle. Identifying the exact cause can be difficult without a thorough inspection by a mechanic. Often its something simple and its worth getting it looked at to avoid higher costs later.

[Kristina Coulson]

That's great thank you 😊 

[Mjolinor]

If it is a relatively recent thing you would do well to get it checked as soon as you can. If the diff bearings have play it causes a misalignment of the pinion gear that makes the whine. If you leave it like that then new bearings will not fix it as the gears wear. If you catch it early then it can be repaired but if you leave it then a new / second hand diff is the only way you will stop it.