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Discussion Starter #1
All,

New owner of 2003 RR with new Wrangler HP tires. Nice vehicle. Probably not a new topic but here it is:

The Issue: When driving 55 - 60 on rural roads, hear an annoying hum (not quiet by any means). So loud it starts to vibrate the windshield. Here is the kicker. On high speed roads, noise is non existent at similar, and even higher speeds.

Vehicle has 34,000, recent 30 K service (what that entails I need to find out). The noise almost sounds like a wheel bearing hum but it is constant, not a surging type noise and only happens on rural roads. The inconsistency in noise on differnt roads leads me to believe (from posts I've read on Tire Rack) it is the tires. Any thoughts from anyone out there? I have lowered the N2 pressure in the fronts and rears (32 PSI front, 35 rear).

Thanks.

Bob
 

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My Dunlop's are very noisy on certain surfaces and quiet as a mouse on others. Wet surfaces are worse. I have heard that the Goodyears can produce noise/vibration in a L322.
 

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2006-2009 Range Rover MkIII / L322
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I can confirm my 19' Goodyear Wrangler F1 are very noisy...
 

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1995-2002 Range Rover P38A
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I would check the D.O.T. date on the tires to see when they were manufactured. I have heard horror stories of people buying new tires at discount only to find they were several years old. For info on DOT -(http://www.trucktrend.com/features/tech ... index.html)

Also, Inspect the tires closely to see if they have hardened/plasticized or cracked. Look for very faint dry-like cracks around the tread. My old set of tires cuped, aquired flat spots and made some terrible road noise even though the tread was about 80-90%. Our cars are over 6k lbs curb weight so driving without rotating or leaving your car to sit for long durations can also do funky things to your tires.

I suspect its your tires as the mileage on the car is too low for bearing wear. If you suspect its a bearing I would jack the car up just enough to were the tire is free and push-pull at 12 and 6 and also at 9 and 3 - look for lateral movement or any grinding. You might also want to try swapping in the spare tire to see if it helps - perhaps you have one defective tire.

Once I changed out my tires to Conti's it was a WORLD a difference - they wear a bit faster but they are beyond quiet!
 

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Trob32 said:
All,

New owner of 2003 RR with new Wrangler HP tires. Nice vehicle. Probably not a new topic but here it is:

The Issue: When driving 55 - 60 on rural roads, hear an annoying hum (not quiet by any means). So loud it starts to vibrate the windshield. Here is the kicker. On high speed roads, noise is non existent at similar, and even higher speeds.

Vehicle has 34,000, recent 30 K service (what that entails I need to find out). The noise almost sounds like a wheel bearing hum but it is constant, not a surging type noise and only happens on rural roads. The inconsistency in noise on differnt roads leads me to believe (from posts I've read on Tire Rack) it is the tires. Any thoughts from anyone out there? I have lowered the N2 pressure in the fronts and rears (32 PSI front, 35 rear).

Thanks.

Bob
I had experienced this noise and the windshield hum and no matter what tires I had (I alternate summer and winter wheels/tires) it would not go away. Until I needed a new windshield and ever since the noise is gone. I am sure it was related to the trim around the windshield and not the tires.

Randall
 

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Trob32 said:
All,

New owner of 2003 RR with new Wrangler HP tires. Nice vehicle. Probably not a new topic but here it is:

The Issue: When driving 55 - 60 on rural roads, hear an annoying hum (not quiet by any means). So loud it starts to vibrate the windshield. Here is the kicker. On high speed roads, noise is non existent at similar, and even higher speeds.

Vehicle has 34,000, recent 30 K service (what that entails I need to find out). The noise almost sounds like a wheel bearing hum but it is constant, not a surging type noise and only happens on rural roads. The inconsistency in noise on differnt roads leads me to believe (from posts I've read on Tire Rack) it is the tires. Any thoughts from anyone out there? I have lowered the N2 pressure in the fronts and rears (32 PSI front, 35 rear).

Thanks.

Bob
I had experienced this noise and the windshield hum and no matter what tires I had (I alternate summer and winter wheels/tires) it would not go away. Until I needed a new windshield and ever since the noise is gone. I am sure it was related to the trim around the windshield and not the tires.

Randall
 

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1995-2002 Range Rover P38A
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Nice catch Randall - It is a common problem with 03 HSE's - they never sealed the windshield properly - mine use to sound like flapping wind noise around 50 mph. Had it fixed (resealed) under warranty and never a problem again. You would hear the noise from the bottom left of the windshield if that were the case.

let us know how it goes.
 

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Discussion Starter #8
All,

Good stuff! Thanks. I think we found the starting point. Re-Inspected the tires again, and oh boy. Same Goodyear Wrangler HP's all around...yeah :evil: ?. There are differences between the front pair and back pair:

1. Tread is more agressive on the front tires. The last row before the sidewall has a wider gap between it and the next to last row.
2. The rears have an additional row and very narrow gap between the last and second to last tread.
3. The "M+S" symbol on the sidewall is located in a different place between the front and back set!

Should have teem this sooner.

Bottom Line: The tires are both 19" Goodyear Wrangler HP's M+S but ....the treads are different. I will rotate front to backs and see what happens. Let you know.

I believe the tires are different Manufacture dates (for the "new and improved" version). It apears the more agressive tread is the latest version.

Oh and by the way, driving home today, there was no horrible noise (very faint) at all on the high way.

Bob

To quote a friend on the 928 forum "
"How many escape pods are there?" "None Sir" "You counted them?" "Twice sir".



leomd said:
I would check the D.O.T. date on the tires to see when they were manufactured. I have heard horror stories of people buying new tires at discount only to find they were several years old. For info on DOT -(http://www.trucktrend.com/features/tech ... index.html)

Also, Inspect the tires closely to see if they have hardened/plasticized or cracked. Look for very faint dry-like cracks around the tread. My old set of tires cuped, aquired flat spots and made some terrible road noise even though the tread was about 80-90%. Our cars are over 6k lbs curb weight so driving without rotating or leaving your car to sit for long durations can also do funky things to your tires.

I suspect its your tires as the mileage on the car is too low for bearing wear. If you suspect its a bearing I would jack the car up just enough to were the tire is free and push-pull at 12 and 6 and also at 9 and 3 - look for lateral movement or any grinding. You might also want to try swapping in the spare tire to see if it helps - perhaps you have one defective tire.

Once I changed out my tires to Conti's it was a WORLD a difference - they wear a bit faster but they are beyond quiet!
 

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I too suffered from this exact problem a couple of years ago and also used the "wheel baring" term to try and explain it. My problem was definately caused by my part worn set of Goodyear's "cuping" which caused the noise. :shock:

I immediately went out and bought a set of Michelin Synchrones and the noise completely disappeared!!! :dance: 2 years and 41,000 miles later and still whisper quiet I eventually had to replace them and currently have Pirelli Scorpions which again seem ok but their wear rate is far greater than the Michelins! :think:

Sad to hear synchrones are no longer available but they will always be my tyre of choice! :thumb:

I recommend you bin the Goodyears at the earliest opportunity to fully appreciate how quiet your Range Rover really can be! :lol:

Cheers,
Andy.
 

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Discussion Starter #10
All,

Update after tire rotation. Noise seems to be better but of course still there. The "Windshield Rattling" from the tire noise hum appears to be the Cowl (wiper washer area) but is better after the quieting down of the Hum.

Ride home today was fantastic, no Hum at all (50 degrees out). Ride in (cold) was a different story. It appears everyone has some tire noise stories so guess we add this to the queue.

Bob
:thumb:
 

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Discussion Starter #11
Randall,

Spot on. I taped the lower molding (rubber piece) at the base of the windshield and the window vibration stopped :clap: I siliconed underneath and will let cure for 24 hours before driving again. Hopefully that's it. Always inspect the simpleest, less expensive solutions first before proceeding to the expensive ones (like tires).

Bob

Randall said:
Trob32 said:
All,

New owner of 2003 RR with new Wrangler HP tires. Nice vehicle. Probably not a new topic but here it is:

The Issue: When driving 55 - 60 on rural roads, hear an annoying hum (not quiet by any means). So loud it starts to vibrate the windshield. Here is the kicker. On high speed roads, noise is non existent at similar, and even higher speeds.

Vehicle has 34,000, recent 30 K service (what that entails I need to find out). The noise almost sounds like a wheel bearing hum but it is constant, not a surging type noise and only happens on rural roads. The inconsistency in noise on differnt roads leads me to believe (from posts I've read on Tire Rack) it is the tires. Any thoughts from anyone out there? I have lowered the N2 pressure in the fronts and rears (32 PSI front, 35 rear).

Thanks.

Bob
I had experienced this noise and the windshield hum and no matter what tires I had (I alternate summer and winter wheels/tires) it would not go away. Until I needed a new windshield and ever since the noise is gone. I am sure it was related to the trim around the windshield and not the tires.

Randall
 
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