01-20-2014, 06:57 PM
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#1
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Join Date: Sep 2013
Location: Georgia
Posts: 39
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Join Date: Sep 2013
Location: Georgia
Posts: 39
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Who's solved a Harmonic Vib?
Have one in the back. Just got a new drive line. The Toyota tech went right there even though I explained what was going on. It seems like a drive line but I was reasonably sure it wasn't. Well... Didn't solve it.
Are there any bushings guys lose back there? I have to go for the rear brakes next. Front rotors were way bent. Assuming the rears must be as well. There is a very slight pulse in the pedal as well. I'm just wondering if anyone else has solved one of these and have any other places to point to.
Stay Thirsty
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01-21-2014, 10:24 PM
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#2
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Join Date: Dec 2012
Location: Laguna California
Posts: 45
Real Name: Tom
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Join Date: Dec 2012
Location: Laguna California
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Real Name: Tom
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When does it occur? What speeds, when braking, accelerating, etc
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FJ TT Springs, Bilstein 5100s, front set at 1.75, 1' rear cornfed spacer, AllPro wheel spacers F1.25 R1.5, 55w hid 5000k HID lows and fogs, High beam mod, Fog light mod, OEM 265/65/17
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01-22-2014, 09:28 AM
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#3
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Join Date: Oct 2011
Location: Salt Lake
Posts: 117
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Join Date: Oct 2011
Location: Salt Lake
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I had a bad vibe at 60-65 on Hwys...suffered with it for at least a year.
Solved when I replaced my old bfg's with new bfg's.
The tires were at 50,000 miles and still had good tread. I think they had worn and caused vibe. Great tires, but tread available was not an issue when I replaced them.
Big vibe in steering wheel = gone!
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2003 SE V8 Bilstein 5100's, DS 2.5/1.5, FJ Spring Swap, BFG 265 70 17 @ 210,000+, XREAS REMOVED, Seafoamed X's 2; new front brake calipers,; new right front axle and bearing hub, ss brake lines. New inner and outer tie rods, upper and lower bearings.
2005 V8 SR5 Bilstein 5100's, with 80,000 miles, (wife), POR 15 rust treatment; Thorley Headers, original CATs
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01-22-2014, 03:39 PM
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#4
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Join Date: Jun 2011
Location: chicago
Posts: 431
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open the window a crack turn up the music and drive faster you shouldnt hear it anymore after that
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01-22-2014, 08:16 PM
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#5
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Join Date: Sep 2013
Location: Georgia
Posts: 39
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Join Date: Sep 2013
Location: Georgia
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Quote:
Originally Posted by bagginz
When does it occur? What speeds, when braking, accelerating, etc
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Constant speeds, light acceleration or decel. I get the slight pulse when light braking. I'm sure my read discs are warped.
I'm certainly running the radio louder though. Works great unless its talk radio. Then the window has to come down but it cold here in Georgia!
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01-22-2014, 08:51 PM
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#6
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Join Date: Dec 2012
Location: Laguna California
Posts: 45
Real Name: Tom
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Member
Join Date: Dec 2012
Location: Laguna California
Posts: 45
Real Name: Tom
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A few things come to mind. most likely its a wheel bearing type issue, brake issue or a tire issue. Possible that you rear diff is bad but that's really rare. Its up to you though to see if you can find any difference in the noise when doing different things.
1. wheel bearing: try driving at 50+ on a smooth quite road and swerve back and forth. if its a wheel bearing it will get louder when more weight is applied to that side the vehicle. swerve left to see if its a right side, swerve right to see if its the left side etc.
2. If its a brake issue, something hanging up or damage/rust on a rotor it "should" get louder or quieter when braking.
3. If its your tires, which is honestly the most common, it will do it all the time and just get louder with speed. If its coming from the rear, A tire rotation should move it to the front. Don't write it off as it not being your tires because there new or have a lot of tread. Tires can have a lot of issues that you cant see and fail all the time.
That's all I got. Hope that's helpful
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FJ TT Springs, Bilstein 5100s, front set at 1.75, 1' rear cornfed spacer, AllPro wheel spacers F1.25 R1.5, 55w hid 5000k HID lows and fogs, High beam mod, Fog light mod, OEM 265/65/17
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01-22-2014, 10:29 PM
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#7
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Member
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Join Date: Sep 2013
Location: Georgia
Posts: 39
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Member
Join Date: Sep 2013
Location: Georgia
Posts: 39
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Quote:
Originally Posted by bagginz
A few things come to mind. most likely its a wheel bearing type issue, brake issue or a tire issue. Possible that you rear diff is bad but that's really rare. Its up to you though to see if you can find any difference in the noise when doing different things.
1. wheel bearing: try driving at 50+ on a smooth quite road and swerve back and forth. if its a wheel bearing it will get louder when more weight is applied to that side the vehicle. swerve left to see if its a right side, swerve right to see if its the left side etc.
2. If its a brake issue, something hanging up or damage/rust on a rotor it "should" get louder or quieter when braking.
3. If its your tires, which is honestly the most common, it will do it all the time and just get louder with speed. If its coming from the rear, A tire rotation should move it to the front. Don't write it off as it not being your tires because there new or have a lot of tread. Tires can have a lot of issues that you cant see and fail all the time.
That's all I got. Hope that's helpful
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Appreciate it. I've been down those roads. I'm stumped and curious if anyone else had had one that sounded like a drive line but wasn't.
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01-22-2014, 10:35 PM
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#8
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Join Date: Dec 2012
Location: Laguna California
Posts: 45
Real Name: Tom
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Member
Join Date: Dec 2012
Location: Laguna California
Posts: 45
Real Name: Tom
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Quote:
Originally Posted by Fuzzy Fingers
Appreciate it. I've been down those roads. I'm stumped and curious if anyone else had had one that sounded like a drive line but wasn't.
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I remember reading a service bulletin for a humming or drone type noise at highway speeds, but I just disregarded it since I don't have the noise on mine. I can look it up again once I get back to work.
Im currently unemployed since I just moved, But I should be back at a lexus Dealer soon with access to Toyota service bulletins
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FJ TT Springs, Bilstein 5100s, front set at 1.75, 1' rear cornfed spacer, AllPro wheel spacers F1.25 R1.5, 55w hid 5000k HID lows and fogs, High beam mod, Fog light mod, OEM 265/65/17
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01-23-2014, 12:47 AM
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#9
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Join Date: Jun 2011
Location: chicago
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Member
Join Date: Jun 2011
Location: chicago
Posts: 431
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Quote:
Originally Posted by Fuzzy Fingers
Constant speeds, light acceleration or decel. I get the slight pulse when light braking. I'm sure my read discs are warped.
I'm certainly running the radio louder though. Works great unless its talk radio. Then the window has to come down but it cold here in Georgia!
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cold in GA oh come on you rednecks dont know what cold is until you go further north. come on up to the IL,MN,WI, IN,MI area lol when your putting on thermal gear on we are still wearing shorts and running the a/c
I would change out the rotors front and back for the slight pulsing with the brake as a start and maybe give the brake system some love with some new jujujuice. One thing i learned on motorcycles is be in tune with what your tires and brakes are doing. 163g miles later and my truck stops better then most new trucks
Last edited by Code2; 01-23-2014 at 12:50 AM.
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01-23-2014, 10:08 AM
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#10
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Join Date: Sep 2013
Location: Georgia
Posts: 39
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Join Date: Sep 2013
Location: Georgia
Posts: 39
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I spent some time growing up in Montana. I know cold and it SUCKS! So when it gets down into the teens and twenties, its cold! You guys can have your snow though. I'll stay down in the land of cotton.
I looked for Service Bulletins on m 4R and couldn't find anything. I appreciate the help though. Payday will have me at the store to get new pads and rotors for the back end. The brake juice looks new.
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01-23-2014, 01:34 PM
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#11
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Join Date: Jul 2013
Location: bay area, ca
Posts: 109
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Join Date: Jul 2013
Location: bay area, ca
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I had humming at pretty much all speeds. Radio played loud always. Solution was rebuilding the rear diff. Bearings were out. Cost 1k. New rear diff would have been around 1800+.
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Last edited by noshortcuts; 01-24-2014 at 02:23 AM.
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