Constant rotational noise while driving. - Toyota RAV4 Forums
4.3 Mechanical Intakes, Exhaust, Tune-ups, 4x4 system, Suspension, Brakes, etc.

User Tag List

Reply
 
LinkBack Thread Tools
#1 (permalink) Old 05-21-2009, 02:10 PM
Member
 
Join Date: Apr 2006
Location: Ontario
Posts: 55
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
Constant rotational noise while driving.

Hi,

2006 RAV4 V6. Here is the problem. Upon acceleration I can hear a rotational sound coming from the back end. As I increase speed, the sound speeds up and produces a higher pitch. The reverse sound happens with lower pitch as I slow the vehicle down. The noise stops when the vehicle is stopped. The sound is constant and is not affected by turning, gear shifts or 4x4 lock (lock under 40km). The sound has become louder over a 6 month period and I have not had it in for pro-help yet. I would like some help with narrowing this problem down before hand. I have searched here and I don't believe this problem is the ECM drone. It is not tire related and it is not the roof rack vibration or the fuel pump hum.

Any takers? Thanks,

Herk
herk is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 05-21-2009, 02:30 PM
Your Humble Administrator
Country: JuneBug's Flag is: United States
 
JuneBug's Avatar
 
Join Date: Nov 2008
Location: Baton Rouge, LA
Posts: 10,798
Thanks: 80
Thanked 1,143 Times in 826 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Garage
Re: Constant rotational noise while driving.

Quote:
Originally Posted by herk
Hi,

2006 RAV4 V6. Here is the problem. Upon acceleration I can hear a rotational sound coming from the back end. As I increase speed, the sound speeds up and produces a higher pitch. The reverse sound happens with lower pitch as I slow the vehicle down. The noise stops when the vehicle is stopped. The sound is constant and is not affected by turning, gear shifts or 4x4 lock (lock under 40km). The sound has become louder over a 6 month period and I have not had it in for pro-help yet. I would like some help with narrowing this problem down before hand. I have searched here and I don't believe this problem is the ECM drone. It is not tire related and it is not the roof rack vibration or the fuel pump hum.

Any takers? Thanks,

Herk
My guess would be a wheel bearing going out.

James
__________________

2008 Limited V6 2WD "The Silver Bullet"


JuneBug is offline  
#3 (permalink) Old 05-21-2009, 02:57 PM
Member
 
Join Date: Feb 2009
Location: Magnolia, TX
Posts: 130
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
What condition is the differential oil in? When did you last have it serviced? Was there anything on the drain plug magnet?
INDYMAC is offline  
#4 (permalink) Old 05-21-2009, 03:59 PM
Member
 
Join Date: Apr 2006
Location: Ontario
Posts: 55
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
INDYMAC,

I have 80000 miles on it and no diff service as of yet. I will look into your suggestion and post back.

Herk
herk is offline  
#5 (permalink) Old 05-21-2009, 04:27 PM
Senior Member
 
Join Date: Dec 2004
Location: Nova Scotia
Posts: 2,223
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
The change interval for the rear diff and transfer case fluid is 64,000 km. Probably should be done even if that doesn't turn out to be your problem.
bmorton is offline  
#6 (permalink) Old 05-21-2009, 06:26 PM
Advanced Member
Country: friendly_jacek's Flag is: United States
 
friendly_jacek's Avatar
 
Join Date: Jun 2006
Location: Alabama
Posts: 2,507
Thanks: 27
Thanked 36 Times in 36 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Re: Constant rotational noise while driving.

Quote:
Originally Posted by herk
It is not tire related
How you do know that? Defective tire with snapped belts or internal separation can sound like that and last a while before it blows up. Uneven tire wear can also produce noisy tire. Rotate tires to exclude that.
If diff was not serviced yet, it needs to be checked also. However, the diff noise would change with acceleration and disappear at low speeds.
No change with turning or loading excludes bearing noise.
friendly_jacek is offline  
#7 (permalink) Old 05-21-2009, 10:26 PM
Advanced Member
Country: RAV N US's Flag is: Canada
 
RAV N US's Avatar
 
Join Date: May 2008
Location: Kitchener, Ontario
Posts: 1,408
Thanks: 7
Thanked 50 Times in 47 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Can you get get rear up so that you can spin the wheels? Then listen for it as you spin them.....

2008 V6 Sport 4WD Flint Mica
RAV N US is offline  
#8 (permalink) Old 05-21-2009, 10:47 PM
Member
 
Join Date: Apr 2006
Location: Ontario
Posts: 55
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
Thanks all for the help so far. I am going to tackle a few of the suggestions tomorrow. I will do the tire rotation because they need to be anyway. I have directional tires so they go front to back, back to front which will completely put tires to rest. The spinning tires idea is interesting and that will be easy. I checked for any leaks and as far as I see there are none whatsoever. The rotational noise sounds like a computer cooling fan going bad that has the magnetic push pull operation (much louder though). I am also going to do the differential oil change and check for debris. Oh and one other thing, it does it while driving in reverse as well.

Thanks again for the suggestions so far,

Herk
herk is offline  
#9 (permalink) Old 05-22-2009, 06:17 AM
Member
Country: manu001's Flag is: United States
 
Join Date: Jan 2009
Location: Ontario
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by RAV N US
Can you get get rear up so that you can spin the wheels? Then listen for it as you spin them.....
Should be very careful when doing so on a 4WD vehicle equipped with Tracction control... I have not tried it on my 4WD RAV, but i suspect that the Traction control may start applying brakes on the rear wheels and transferring power to the Front wheels, and the car would move!!
manu001 is offline  
#10 (permalink) Old 05-22-2009, 08:13 AM
Member
 
Join Date: Apr 2006
Location: Ontario
Posts: 55
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
manu001,

I took the suggestion from RAV N US to spin the tires with my hands while car is off. Thanks for the polite cautionary note though. That is an interesting thought of what the "brain" would control.

Herk
herk is offline  
Sponsored Links
Advertisement
 
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome