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Discussion Starter #1
Rear noise that increases with speed. It’s a 2007 Sorento 2.5 manual. Bought it 2 weeks ago , the seller said that it was a rear wheel bearing but I’m unsure. Heard loads about rear diff noises etc. Just wondered which would be best way to determine whether it’s the bearing, sound doesn’t change when turning left or right or at sharp corners , also sound still there when I dip the clutch. Just annoying as hell really. Also I believe some think it could be tyre noise but again how do I check. Sorry for the questions. And by the way love this forum and have been reading through it for hours.

im jake by the way. I’m in West Yorkshire so I hopefully await any replies. Thankyou
 

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Discussion Starter #3
Cheers I’ll definitely try that. Although I don’t think there worn as it passed its mot last week. But maybe they have a bubble or something.
 

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You need to have the least worn tyres on the rear for that model.

Passing MoT only means that the tyres are legal. Different tyre brands produce more or less noise - I had a set of budget tyres on my old Avensis and they droned quite noticeably.

deffo check tyres for even wear and check/adjust pressures as a first step.

Wheel bearing noise is usually localised to one side but if you jack the wheel and release the handbrake (make sure the car is well chocked) you can rotate the wheel by hand and usually hear or feel a dodgy bearing.
 

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Hi thanks for your replies well I tried tyres and moved them around but the sound still prevailed. ( all like new general grabbers ) also was told rear right wheel bearing was noisy so had that changed too, still the whine is there. It starts around 30mph and increases with speed dropping ever so slightly at 70mph but not much. I’m really needing to get to 5he bottom of this now , what else other than diff can make whining noises? IF it is the diff then I guess I’ll have to bite the bullet. I’ve also heard something about these having to be jacked up 8“ at the rear when changing diff fluid, this is apparently to make sure yo7 get the proper amount in , so going to change the fluid next , although the fluid that’s in there looks pretty clean and no metal shavings or anything, so hopefully maybe not enough fluid in there or it’s broke down in viscosity over time ?? Or the damage maybe already done...Any thoughts ? Thankyou once again
 

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Discussion Starter #7
Hi mal. The brake discs are fairly new, I have a receipt to say they were changed in sept last year. Also it flew through the mot last week. The thing is , I love the motor but the noise is driving me nuts. Been out tonight to Manchester from my home in Halifax , short journey but the noise at around 60mph and over were unbearable , quieter if kept at around 50mph but embarrassing getting overtaken by bloody artics 😕 I’m just not convinced yet that it is the diff that’s kaput , because I’ve had rear diff fail before but they were clunky noises if that makes sense. Once again 5hanks for your input.
 
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