Slight harmonic vibration (1 Viewer)

[Arekusan40]

Parnoren: my transfer case "feel" through the lever doesn't vary, so suspect it's not that. Plus, if it's the transfer case, the vibes wouldn't go away when taking it out of OD, as all transfer case speeds/loads do not change whether in OD or not. I will live with this slight annoyance (maybe forever!) but if motivated someday I'll change the motor mounts then report back. We could use some retired Toyota NVH engineers on the forum!

 

[SpectraBlu]

I know it's an old post, but op did you ever figure this out? I'm a new member here with a 01 "Lando Calrisian" with 180k and have the same problem. I'm planning on changing out the motor mounts, all the suspension bushings, and timing belt in the spring once it's warm enough to work without freezing to death lol. Thanks

 

[ToHiHy]

Start by making sure your slip yokes on the propeller shafts are greased correctly. You'll want grease to come past the seal.

 

[SpectraBlu]

Start by making sure your slip yokes on the propeller shafts are greased correctly. You'll want grease to come past the seal.

thanks for the reply. Sorry, I should've have stated that I already did that. It feels like a beater from 1600-2000rpm, below and above that rpm range it's nice and smooth. Does it in every gear and any speed whenever it drops into that rpm range, I feel vibrations in the gas pedal.

 

[albylam]

Disregard I just re read the op post.



Look directly under the front passenger side, do you have one of these (see pic) bolted to the frame or are you missing it?

I had a question about it today (I wanted to remove it) went to the FAQ section and one of the possible reasons for its existence is to cancel exactly what you are having issues with. There is no clear answer for what at it is but some have suggested that it's there to cancel vibrations at certain speed. If you are missing it this could be the solution. Seems like its a piece we all want gone bc once you lift the lc you can see it just sitting there, like an anchor.

I know this is old. Just wondering if we only have this weight on the passenger side and nothing on the driver side? I think the original rear springs is higher on the driver side for the ahc system. is this to compensate? The reason I'm asking is I switched to king springs which are equal in height instead of the originals. should i be adding extra weight to driver side too?

 

[87nm60]

Just bought an 05 with 150k and I have the exact same issue between 2500-3000 I greased the driveshafts and replaced all the oils. No luck.

 

[100d ua]

Bumping this thread. Having the same issue with a minorly annoying vibration past 60 MPH (freeway) in the drivetrain. I was hoping after installing my lift and doing a light suspension refresh (tie rods/ball joints) and alignment that it would get better but it's just as bad.

Vibration is not in the steering wheel, more like through the floor/seat/pedal. Sound can also be heard through the car... like a pulsating humm....

HUMMM... HUMMM... HUMMM... HUMMM...

Mostly gets worse when the skinny pedal is pushed going up hills, passing, or trying to speed up.

I installed the "harmonic balancer" that goes on the frame tonight and will report back if it helps at all. Next step will be to rotate the tires.

Some context:
Front/rear diff / t-case & transmission fluid recently replaced
All zerks on drive-shaft greased
new brakes/rotors & bearings re-packed

 

[lesgarten]

Bumping this thread. Having the same issue with a minorly annoying vibration past 60 MPH (freeway) in the drivetrain. I was hoping after installing my lift and doing a light suspension refresh (tie rods/ball joints) and alignment that it would get better but it's just as bad.

Vibration is not in the steering wheel, more like through the floor/seat/pedal. Sound can also be heard through the car... like a pulsating humm....

HUMMM... HUMMM... HUMMM... HUMMM...

Mostly gets worse when the skinny pedal is pushed going up hills, passing, or trying to speed up.

I installed the "harmonic balancer" that goes on the frame tonight and will report back if it helps at all. Next step will be to rotate the tires.

Some context:
Front/rear diff / t-case & transmission fluid recently replaced
All zerks on drive-shaft greased
new brakes/rotors & bearings re-packed

Which Harmonic Balancer did you install? Passenger or Driver's side?

 

[100d ua]

Which Harmonic Balancer did you install? Passenger or Driver's side?

I installed the passenger side one. I did not see a driver side one?

2 days of driving it with the weight back on and I can finally cruise at 65-75 with no vibration in the floor vibrating my gas pedal foot. It’s nice. Gets a little squarey as I get up to 80 tho.

 

[87nm60]

I installed the passenger side one. I did not see a driver side one?

2 days of driving it with the weight back on and I can finally cruise at 65-75 with no vibration in the floor vibrating my gas pedal foot. It’s nice. Gets a little squarey as I get up to 80 tho.

Mine didn’t come with the OEM balancer on the frame. Where did you pick yours up? What was the part number?

 

[gregnash]

I installed the passenger side one. I did not see a driver side one?

2 days of driving it with the weight back on and I can finally cruise at 65-75 with no vibration in the floor vibrating my gas pedal foot. It’s nice. Gets a little squarey as I get up to 80 tho.

Interesting... never heard of that being a "fix" seeing as in 02 (I think) toyota removed it all together. Was going to say that I have the same thing going on, can feel the vibration through the floor. Mostly has harder acceleration, so you can "sneak up on it" and get past the vibration by accelerating slower. 99% sure that mine is linked to the cheap chinesium cv axles that the PO installed and the s***ty job the shop did installing everything when they did axles and lift.

 

[100d ua]

Mine didn’t come with the OEM balancer on the frame. Where did you pick yours up? What was the part number?

No idea... I removed it when I took my running boards off and put them back on for giggles trying to narrow down my floor vibration.

Seems to help, tho i wouldn’t say it all together was the solution. I’m sure my cv axles are on their way out. They’ve been leaking for some time now.

 

[lesgarten]

Interesting... never heard of that being a "fix" seeing as in 02 (I think) toyota removed it all together. Was going to say that I have the same thing going on, can feel the vibration through the floor. Mostly has harder acceleration, so you can "sneak up on it" and get past the vibration by accelerating slower. 99% sure that mine is linked to the cheap chinesium cv axles that the PO installed and the s***ty job the shop did installing everything when they did axles and lift.

I have the passenger one on my 02 from the factory

 

[Jeppers]

I am having the same issue and have replaced the following:
Wheel Bearings
Transfer case output shaft
Both front and rear driveshafts (both new OEM)
Wheel bearings (koyo)
Tires and Wheels
Upper and lower ball joints (both sides)
Rebuilt CV's

And it is still there, I guess next is motor mounts.

 

[abuck99]

Sooo many things can cause NVH
Engine:
Plugs
Coils
Exhaust system
Engine mounts
Transmission,and mount
Harmonic balancer
Cracked Flex Plate
Mud inside fan-where it mounts to viscous clutch
Failing fan bracket bearing

Driveline:
Mud inside wheels
Dragging e-brake shoe or caliper
Worn CV axle
Worn ujoint
Propshaft-small dent, scrape, over greased
Bent rear axle
Output flanges exceeding runout-bearings or preload

The list goes parabolic-

Heres a comprehensive list that you can use to narrow in on your issue

Pulsing/droning vibration at highway speeds

forum.ih8mud.com

 

[Jeppers]

Motor mounts replaced and still there, it sounds like it is still there in neutral going around 45. Any other ideas to add to the list of things to replace? Going to get tires balanced and another alignment as well, its crazy but it is smooth at 70+

 

[TLEXAS]

Did you replace the transfer case mount as well? It was part of an incremental benefit to my upgrade of comfort and driving performance for my rig over the past two years and was a noticeable improvement

 

[Jeppers]

Actually got it fixed last night and seems to be the source of a hum and vibration going on and off the gas from 75-80 as well as the 40-50 harmonic noise. The fix was to grease the spindle needle bearings, had the tool and never used it. My guess is they have never been greased in 380k

 

[hickuptruck]

Wheel bearings. Even though they are repacked, they wear and cause noise even if they are greased.

 

[Jeppers]

New wheel bearings, that was what I though initially. Spindle bearings with added grease got rid of the noise