XC60 D5 Resonant Vibration

[baletak]

Mine is also Polestar tuned. Did you change haldex pump? Is it gone?

[stepanstepanov]

Hi guys!
First of all sorry for my english

I have the same issue with vibrations not only during speedup (feels like turned highest gear on low engine rate on manual transmission) but on idle as well (but much less), and what I have already done but that didn't helped:

Replaced mounts 30793322, 31262935, 31277313, 31316875, 30793318
Changed oil in AT, Haldex
Turned off Haldex fuse

Vibrations are still there on idle and while driving on 30-40km/h 70-80km/h

What I'll try to do next:

1. Take two jacks with thick rubber gaskets on them,
2. Place them right beneath left (31316875) and right (30793318) mounts,
3. Loosen specified engine mounts to take the load off them,
4. Turn engine on
5. Lower the jacks one by one
6. Figure out which side produces more vibration and which mount have manufacturing defects.

In case vibrations will persist even on lifted engine I will regard it as problem with torque converter (31325000)

Maybe you have any ideas about my plan?

[baletak]

Did you managed to resolve this?

[DT52]

Originally Posted by stiggles

Hi

I've recently purchased an XC60 D5. It's a 2013 Model year (pre face-lift) D5 Geartronic AWD, with the 230BHP Polestar upgrade. The car generally drives very smoothly with no weird clunks (perfect shifts on the gearbox etc). It's done 95k.

One thing I've noticed however is that occasionally there's some sort of deep resonant sound somewhere in the drive-train. At speeds of 30-40mph you can provoke by maintaining a light throttle on a slight incline. A deep bassy rumble can be heard through the car. Knock it into sports mode, and it doesn't tend to happen as much.

At speeds exceeding 60-70mph again with light acceleration it feels more like a going over a rumble-strip and can be physically felt & heard through the vehicle. At these speeds sports mode doesn't seem to eliminate it. Lifting off or really accelerating hard does seem to cancel it out.

I've been advised my vehicle is current with all of it's software updates. The only other thing to mention is the tyres do not match front to back with Michelin Pilot Sport 4 SUV's on the front & Continental Sport Contact SUV 5's on the rear. The rears have 4mm of tread - the fronts are brand new).

Am I chasing down a normal characteristic of these cars or should I be looking to get the drive-train checked over? I'm considering putting 4 cross-climates on it so that I've got a full matching set of tyres, but obviously it's a large expensive particularly if they all drive like this!

Thanks

David

Hay man, exactly same thing on 2016 awd XC60 D4.

Would be super helpful what you root caused it to ...

One ex Derby dweller and XC60 owner to a other

Cheers!