Vibration at low RPM

[johnluke]

Not sure what the problem is. When i'm in traffic or at a drive thru and slowly giving the truck gas I feel a vibration coming from what feels like under the pedal or at least in that area. It only does it from about 700 to 1100 RPM's then goes away. Any idea's? Truck has 62,000 miles on it. Fluids are good.
Thanks in advance

 

[Bako_Dmax]

Not sure what the problem is. When i'm in traffic or at a drive thru and slowly giving the truck gas I feel a vibration coming from what feels like under the pedal or at least in that area. It only does it from about 700 to 1100 RPM's then goes away. Any idea's? Truck has 62,000 miles on it. Fluids are good.
Thanks in advance

Do you have EFI Live? Reason I ask is you can use the DVT to raise the rpms to where you hear the vibration, you can then walk around the truck and find where the vibration is.

First thing I would do is check is your exhaust.

 

[x MadMAX DIESEL]

Motor mount?

 

[johnluke]

I don't have EFI so i can't try that (someday hopefully) but anyway I doubt it's the exhaust, I will check it tomorrow though, but it feels like it's near the pedal. Could be a motor mount. Anything in the front end that could cause this? like a wheel bearing or something.

 

[JoshH]

Does it only do it when you're moving?

 

[johnluke]

ya, I notice it under 10mph lasts maybe 3 seconds then goes away

 

[JoshH]

Maybe the tires? If you have some mud tires or agressive all terrains, they can sometimes cause weird vibrations at low speeds.

 

[johnluke]

i have Toyo open country AT's 285 75 16, but have had several sets them over the last 2 yrs. I started noticing this maybe month and half ago, I'm stumped on what it could be. feels like a moving part that's binding at slow speed and low rpm, then it free's up and is fine.

 

[x MadMAX DIESEL]

Rear of the cab stuff can make a truck feel funny in the front of the vehicle. Unbalanced drive shaft can deffentatly feel like its comming from the front end. Sorry I have no real ideas but just dont limit your problem to the front end


EDIT: Try and hold those RPMs in park and see if it starts to vibrate also

 

[johnluke]

Just went out and tried it in park, no vibration, put it in drive slowly accelerated and it was there, it's not very bad, doubt anyone would notice, unless you drive the truck everyday.

 

[x MadMAX DIESEL]

I would just check all your motor and trans mounts

 

[johnluke]

Thanks I'll check that out tomorrow, I appreciate the help

 

[Bako_Dmax]

Jack the truck up and check the front tires for any movement. Could be bad wheel bearings.

 

[johnluke]

That's kinda what I was thinking, just check for movement?

 

[Bako_Dmax]

Grab the top and bottom of the tire if you can move it back and forth the wheel bearing is bad. If you grab the sides of the tire and can move it its probably a steering component like pitman of idler arms.

Tire shouldnt move at all

If you have never changed a wheel bearing at 62k they are probably a little worn. I have 60k and have replace both on my truck.

 

[johnluke]

Thanks,I will definetely check that tomorrow, did you notice any vibration or anything out of the ordinary before you did yours?

 

[Bako_Dmax]

Mine squalled and made noise. Never really felt a vibration.

BTW if you do have to change a wheel bearing there is a nice write-up in the DIY section

 

[johnluke]

Thanks i'll find out tomorrow, I do have an extended warranty on the truck, any idea what a bearing goes for?

 

[Bako_Dmax]

I got mine for around $160 from summit but they can be much more expensive from other places.

 

[Hockensmithchaz]

Did you ever figure this out? Experiencing the same issue.