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I have a 07 Volvo XC90 with V8 I’m having a load gear noise…

I have a 07 Volvo...
I have a 07 Volvo XC90 with V8 I’m having a load gear noise coming from the back or middle of the car it goes away at about 52-55 mph and I just replaced the the back 2 wheel hubs thinking it was the problem, the car has 180,000 miles. Thanks Kevin
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Answered in 15 minutes by:
11/20/2017
Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Volvo
Satisfied Customers: 16,621
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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Hi, my name is ***** ***** is usually caused by a bad viscous coupler, the viscous coupler is what engages and disengages the rear differential, for the all wheel drive, have you had this on a lift to check where the noise is coming from?

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Customer reply replied 8 months ago
No I have not.
Customer reply replied 8 months ago
I’m trying to self diagnose if I can.

on the front of the rear differential, is a the viscous coupler, it bis between the driveshaft and the differential, it is very common for these to go out above 150k miles, we do alot of them, you will need to jack up all 4 wheels and run it and see if the noise is coming from this, if it is, then the viscous coupler will need to be replaced,Tim

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Customer reply replied 8 months ago
Ok thanks Tim I will try it, what would the price of parts be est? And should I do a oil change on the rear diff as well? Thanks

the viscous coupler is expensive, about 3500 from volvo, but we have had good luck finding a used one from salvage yards, make sure you get one with under 100k miles, usually they can be found for about 900 dollars,Tim

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Please dont forget to rate me, so I can get credit for helping, thanks,Tim

Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Volvo
Satisfied Customers: 16,621
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
Verified
Tim Mohr and 87 other Volvo Specialists are ready to help you
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Customer reply replied 8 months ago
Thanks Tim

Anytime my friend,Tim

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