Motorway speeds 70 mph take the foot off the accelerator on a long downhill section M65 Vibration through the steering wheel.. No issues when accelerating hard or gentle just when coasting. sure its not the tyres as all other speeds conditions ok. Just when coasting. Gearbox? Torque convertor?

Thoughts?

I have exactly the same on mine, you can clearly feel a vibration and hear a droning sound on deceleration, I have placed the gearbox into neutral at speed on occasion to allow for engine idle on coasting to see if it is a gearbox / motor related issued, and the drone + vibration continues, no audible / physical difference based on engine speed at the exact moment.. Below 70mph and she returns to being a quiet and smooth as one would expect, literally goes from full drone to dead smooth instantaneously..

So in my case its not gearbox related.

Rear diff has been replaced by JLR with brand new, same drone..
Rear propshaft has been replaced by JLR with brand new - same drone..
Transfercase has been replaced by JLR with brand new - same drone..

Last comment from JLR - "this noise is standard, accept it..!!" which makes me ask why they changed all the above, at their cost, if this is all 'normal'

I am running the 22" turbines, Continental cross contact LX sport 275-40-22

2014 5.0SC, approx 41K miles..

I absolutely hate the drone, drives me mad, tyres will need replacing soon so I am hoping that resolves the issue, however I am dead afraid it might be front diff related as she is now out of motorplan..

I vaguely remember reading the 22" turbines being noisy / causing noise, but that's a long lost memory and I do not know if it would apply in this regard..

Good luck, I too am desperate for a solution..

Does the noise go away when you touch the brakes, or does the steering vibrate more? And when you say vibrate is it shaking from side to side a little or just a high frequency vibrate?

I had a new Audi A6 once that used to create resonance at certain speeds....it was faint but I knew it was there and it drove me mad. Audi were sure it was the gearbox so they swapped it out (they get paid for warranty work so why not), but that did not cure the problem. Turns out the new aluminium chassis is really good at amplifying any road imperfections, and the noise was the tyre drone resonating through the chassis. I found this out when I change for winter tyres later that year and the noise went completely. 2021 L405 Vogue D300
2016 L405 Vogue 3.0TDV6 (Sold)

Last edited by JamesD on 5th May 2021 3:47pm. Edited 1 time in total

James, interesting read, thank you, I know your question is directed at Bessy645 so please forgive the hijack, in my case the wheel does not wobble, simply vibrates, or buzzes faintly, its more noise than feel.

Applying brakes changes nothing, simply the drone stops all by itself under 125kph / 70mph.

Interestingly, the drone stops on acceleration when passing 145kph, give or take..

I'm starting to think resonance on my fattie is the culprit, will be interesting to see what gives with a change of tyres in the not too distant future..

I had a droning sound at 60 MPH, turned out to be the air filter box was not seated properly, took a bit of working out.

Sorry to revive such an old topic, but I’d like to know if you have managed to solve this issue?

I’ve been having the same problem for about 2 years now and have thrown € five figures at it and have changed most of the drive train by now.

My solution it to not drive faster than 120kmh as it’s not a problem at that speed on mine, so exactly like marcochezzi described.

Wheel bearings maybe?

I want to prevent even more open ended topics, so others can find the answers they are looking for without endlessly diving through topics.
The owners who have faced the issue will be the best to speak on it.

The specialists (3) and me are really at our wits end with this and I don't want to keep pouring money into this.

To list what we have tried:
- New tires and rims aligned and balanced several times (Pirelli)
- New oil for all diffs and transfer cases and gearbox
- Engine supports
- Front driveshaft replaced
- Front left axle replaced
- New brake disks and pads in the rear
- Right front wheel bearing replaced
- Differential revision
- New rear driveshaft

I suspect the rear driveshaft, or whatever that is attached to, as replacing the shaft resulted in a temporary fix, but the issue reappeared. When we took off the old driveshaft we noticed that the joint didn't move smoothly when moved from side to side. It was like there was a spot when centred that seemed to be the preferred position. We only noticed this after the new one was already installed, so no way to verify if that had the same, or if over time this centre point had been grinded in to the old one.

Very rarely the issue is not present and the car is super smooth, but within minutes it comes back. In my mind it feels like all of a sudden the parts are well aligned and working well together and after coasting/decelerating they get misaligned/unbalanced again.
Sometimes it feels like the driveshaft is like a jump rope when I very lightly accelerate between 80-100km/h.

It also suffers from the issue that when decelerating/coasting from 130km/h there is a noticeable vibration like the topic starter described.