Deceleration Hum - Page 2 - Toyota FJ Cruiser Forum
Problems / Dealer Service If you are having a problem with your FJ or want to discuss a visit to the service department, post it here.

 2Likes
Reply
 
LinkBack Thread Tools Display Modes
post #11 of 35 (permalink) Old 01-13-2015, 01:07 PM
Forum Superstar
 
FJ&TJ_Dude's Avatar
 
Join Date: Nov 2010
Location: Ohio- Berea 44017
Posts: 3,412
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 276 Post(s)
Lifetime Supporting Member
Re: Deceleration Hum

Maybe your air dam

Thank you Vets




FJ&TJ_Dude is offline  
Sponsored Links
Advertisement
 
post #12 of 35 (permalink) Old 01-13-2015, 01:14 PM Thread Starter
Forum Master
 
Serenity Now's Avatar
 
Join Date: Jan 2015
Location: Minnesota, USA
Posts: 1,387
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 432 Post(s)
Garage
(Thread Starter)
Re: Deceleration Hum

The tires are Nexan Roadian HTX. Certainly shouldn't be noisy normally...

http://www.tirerack.com/tires/tires....oadian+HTX+RH5

Steve in MN, sponsored by Blue Sun Corporation
2010 FJ, now with exciting grill and shifter knob mods

"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." - Jeremy Clarkson
Serenity Now is offline  
post #13 of 35 (permalink) Old 01-13-2015, 01:16 PM Thread Starter
Forum Master
 
Serenity Now's Avatar
 
Join Date: Jan 2015
Location: Minnesota, USA
Posts: 1,387
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 432 Post(s)
Garage
(Thread Starter)
Re: Deceleration Hum

Quote:
FJ&TJ_Dude previously said: View Post
Maybe your air dam
Doesn't seem likely, based on the nature of the noise and the way it remains all the way to zero speed. I would think an aerodynamics-related noise would drop away before I came to a stop.

Steve in MN, sponsored by Blue Sun Corporation
2010 FJ, now with exciting grill and shifter knob mods

"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." - Jeremy Clarkson
Serenity Now is offline  
Sponsored Links
Advertisement
 
post #14 of 35 (permalink) Old 01-13-2015, 01:38 PM
Forum Superstar
 
iwashmycar's Avatar
 
Join Date: May 2011
Location: Columbus, Ohio
Posts: 9,677
Blog Entries: 9
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1154 Post(s)
Garage
Send a message via AIM to iwashmycar
Re: Deceleration Hum

I vote tires as well. Could simply be the alignment is off or tire pressure and is causing it.

-Adam

'07 Black Diamond 4WD AT UR

TLCA #22985
295s | 3" | BL | Lights | Armor | Rails | Snorkel | CB | Dent(s)
Feb. 2017 Member of the Month
In the Midwest? OHIO FJ Owners
iwashmycar is offline  
post #15 of 35 (permalink) Old 01-13-2015, 03:25 PM
Forum Superstar
 
Wikid's Avatar
 
Join Date: Jan 2007
Location: Tempe.AZ
Posts: 9,009
Mentioned: 25 Post(s)
Tagged: 1 Thread(s)
Quoted: 94 Post(s)
Garage
Lifetime Supporting Member
Re: Deceleration Hum

I had a rear pinion bearing making a hum noise while decelerating

"The Rock"
https://www.fjcruiserforums.com/forum...8490-rock.html

WikidfJ Partially retired
Wikid link
Wikid is offline  
post #16 of 35 (permalink) Old 01-13-2015, 03:45 PM
Forum Veteran
 
Join Date: Jul 2010
Location: Mount Juliet, TN
Posts: 574
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
Re: Deceleration Hum

I would jack it up and check the bearings. See if there is any play in the wheels and rotate them by hand when elivated.

I also have a humming noise when coasting in 2wd. I jacked it up last weekend and found that the driver's side front did not spin as freely and made the mystery noise.

I ordered a wheel bearing/hub assembly and will be replacing it soon.

For the record I am at about 57,000 miles.

2010 FJ Cruiser TT
2018 Subaru WRX STI
1999 Dakota R/T
1996 Dodge Stealth R/T Twin Turbo
M1102 Expo Trailer
2019 Luna Rover



FJ Build Thread:
https://www.fjcruiserforums.com/foru...tts-build.html
Sand Crawler is offline  
post #17 of 35 (permalink) Old 01-13-2015, 08:45 PM
Forum Regular
 
zducer's Avatar
 
Join Date: May 2011
Location: Silver Spring, MD 20906
Posts: 183
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
Re: Deceleration Hum

There's a big chance that the noise is from tires. Cheap tires makes a lot of noise even after 5k of use. Usually they put the cheapest tires on the market for used vehicles that they are selling.
zducer is offline  
post #18 of 35 (permalink) Old 01-13-2015, 09:54 PM Thread Starter
Forum Master
 
Serenity Now's Avatar
 
Join Date: Jan 2015
Location: Minnesota, USA
Posts: 1,387
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 432 Post(s)
Garage
(Thread Starter)
Re: Deceleration Hum

Quote:
Texas TT previously said: View Post
I would jack it up and check the bearings. See if there is any play in the wheels and rotate them by hand when elivated.

I also have a humming noise when coasting in 2wd. I jacked it up last weekend and found that the driver's side front did not spin as freely and made the mystery noise.

I ordered a wheel bearing/hub assembly and will be replacing it soon.

For the record I am at about 57,000 miles.
Interesting.

Steve in MN, sponsored by Blue Sun Corporation
2010 FJ, now with exciting grill and shifter knob mods

"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." - Jeremy Clarkson
Serenity Now is offline  
post #19 of 35 (permalink) Old 01-13-2015, 11:46 PM
Forum Superstar
 
Join Date: May 2014
Location: San Andreas Fault Zone
Posts: 3,064
Mentioned: 141 Post(s)
Tagged: 0 Thread(s)
Quoted: 1400 Post(s)
Re: Deceleration Hum

Quote:
Texas TT previously said: View Post
(snip) I also have a humming noise when coasting in 2wd. I jacked it up last weekend and found that the driver's side front did not spin as freely and made the mystery noise.

I ordered a wheel bearing/hub assembly and will be replacing it soon.

For the record I am at about 57,000 miles.
When you performed your "wheels spin freely" test, you removed all four front brake pads, right?

Very rarely do worn & noisy wheel bearings affect the "free-spinning" characteristic of a wheel hub unless the bearing is literally disintegrating.

If the bearing had enough internal friction (with no load on it) to obviously affect wheel drag when spun by hand, the bearing would be literally smoking after an hour on the freeway at 65 MPH.

I think it's unlikely that your front wheel bearing has gone bad at 57K miles unless it has somehow been subjected to extremely severe abuse.

If you didn't pull the pads the first time, I'd remove the wheel again, pull the pads, and repeat your "spins freely/listen for noise & roughness"" test before going through all the effort and expense of replacing the wheel bearing, which is not a trivial job on the FJ. You know that the wheel bearing is press-fitted into the steering knuckle, right?

Last edited by FJtest; 01-13-2015 at 11:53 PM.
FJtest is offline  
post #20 of 35 (permalink) Old 01-14-2015, 07:17 AM Thread Starter
Forum Master
 
Serenity Now's Avatar
 
Join Date: Jan 2015
Location: Minnesota, USA
Posts: 1,387
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 432 Post(s)
Garage
(Thread Starter)
Re: Deceleration Hum

I was taught to test the wheel bearing by jacking up the vehicle, grasp the tire at top and bottom and rock the wheel to see if there is free play. If there is free play, it is either the wheel bearing or the ball joints, so it is helpful to have someone watch the backside of the wheel to see whether the play is in the wheel hub or the ball joints.
seadogcam likes this.

Steve in MN, sponsored by Blue Sun Corporation
2010 FJ, now with exciting grill and shifter knob mods

"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." - Jeremy Clarkson
Serenity Now is offline  
Reply

  Toyota FJ Cruiser Forum > Toyota FJ Cruiser Discussion > Problems / Dealer Service

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Toyota FJ Cruiser Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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