vibration in gas pedal

[mcioci]

Originally Posted by devilsfan

All I know is good luck in finding a new one. It's currently back ordered through Hummer. 15 dealers in the country have ONE in stock and aren't happy about parting with it. I needed a new one a month ago, my shop managed to find one in Michigan from a dealer who had 2 in stock. Junkyard might be your best bet.

Do the Hummer dealers rebuild these diffs? Or do they just buy rebuilt ones and install them? Are rebuilt diff's not reliable?

[mcioci]

Now dealer says they dont know what the noise is. They are not sure its the front diff. They were saying it might be coming from my roof cage or front brush grille. I said how could that be? The noise is from 45-65mph and on acceleration. I said since the vibration is in pedal and noise is definitely coming from under the car it cant be the roof cage or brush guard.

I did wire brush the rust on bottom of truck and spray rustoleum. Could that have caused this groaning sound from 45-65mph? it did start happening right after this.

[ricomondo]

I had a somwhat similar problem in the 05 I had. Turned out the tires (front) were "cupped" I had a bad suspension part, and it wore the tires unevenly.
It's worth a shot to check?

Once the front end was fixed, aligned and new tires, I was all good.

[HummerJim]

I had a vibration in the gas pedal and on the floorboard by the emergency brake. When I got new tires and had the front end aligned it disappeared. My guess is alignment and tires also.

[mcioci]

Tires are brand new but one could be defective i guess but the issue only started right after installing the brush grille and gobi roof cage. I'm going to take off the grille and test drive it.

[H2Much]

Sounds like the alignment to me. Could also be loose steering. Pretty sure it has to do with your wheels though, that is almost where all of that stuff comes from, something with your front wheels/rims/suspension/alignment.

Could also have something to do with the locked 4 wheel drive or locked diff being on, though I am sure you would have checked this... right?

[mcioci]

I had truck with dealer for a week. Checked everything in front end, alignment, checked front diff, tires, everything was checked locked diff is not on. My steering is tight and pitman arm checked and it's fine. Tires are new and I didn't have this vibration/droning sound for the first 7 months with my new tires. This droning sound just started happening the same day I put on my brush grille and gobi cage. I'm taking the brush grille off this week and then test driving it. I will let you guys know what happens with the test drive.

[mcioci]

I had truck with dealer for a week. Checked everything in front end, alignment, checked front diff, tires, everything was checked locked diff is not on. My steering is tight and pitman arm checked and it's fine. Tires are new and I didn't have this vibration/droning sound for the first 7 months with my new tires. This droning sound just started happening the same day I put on my brush grille and gobi cage. I'm taking the brush grille off this week and then test driving it. I will let you guys know what happens with the test drive.