Please help with my 07 H2

[H2-Canuck]

I have a couple issues I need help with, 1st issue - Once I reach 30mph and up there is a womm womm womm sound from the left front driver's side. I was told it was a wheel bearing so I changed both left and right front wheel bearings. Sure enough the sound is still there, really frustrated so I ask my mechanic to come for a ride, and of course the noise wasn't there. There are times it won't make the noise but 90% of the time it does. I also have tires that are only 4 months old and maybe 20km a day. The H2 has 62000mi on it!! Any ideas would be greatly appreciated

2nd issue-There will be times when I accelerate the truck and it feels like its working extra hard and makes a moaning/groaning/buzzing sound. It seems like it's coming from the engine and while I am accelerating the steering wheel is vibrating and the second I let off the gas, I can feel the vibration on the gas pedal.
If anyone can help
Thanks

 

[alrock]

I don't know the H2 front end that well, but it seems like there could be worn parts that could cause both of these issues if a tire isn't rolling properly due to worn components - worn parts that put tires out of alignment sometimes.. Did your old tires have any abnormal wear on them?

 

[H2-Canuck]

I didn't notice any abnormal wear, only noticed the tires looked to be low on tread , and had cracks along the sidewalls. The tires were the originals and had close to 95,000km The place I bought the truck said it passed the safety. LOL
I drove home and heard the left front side make the noise, so the next day I went and bought new tires. Drove onto the highway with the new tires and sure enough that same sound was still there. I never got an alignment with the new tires and I know I should have.
Thanks

 

[Scarsman]

Any leaking from your front differential? Wonder if maybe you have a bearing going bad in there?

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[alrock]

The more I think about it the more I think it is a result of something binding, like the diff example. I would also take a look at the differential crossmember and make sure the bushing is intact. More remotely interested would look at motor mounts but that is less likely the issue

 

[Big2dabank]

I agree with Alrock, if the cross member busing is worn or even torn, the diff could rotate up under accelleration, changing the pinion angle and putting pressure on the prop shaft. That might be making the noise you are hearing.

 

[autumn walker]

any pics of the crossmember bushing? is the whole crossmember required to be replaced or can the bushing itself be serviced?

 

[alrock]

I believe the H2 crossmember is like that of the H3-the whole crossmember must be replaced

 

[Scarsman]

Yep! It's the whole package. Over $400 for the part if you aren't under warranty! I tried to keep my old one so I could come up with a better solution, but they had to send it in since it was done under warranty.

 

[H2-Canuck]

Any leaking from your front differential? Wonder if maybe you have a bearing going bad in there?

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No leaks anywhere!! I had a Yukon with a bad front differential and it made a bad cluncking and grinding sound. This is a different sound

 

[H2-Canuck]

The more I think about it the more I think it is a result of something binding, like the diff example. I would also take a look at the differential crossmember and make sure the bushing is intact. More remotely interested would look at motor mounts but that is less likely the issue

Thank you alrock I will get them to check the diff crossmember next.
Big thanks

 

[H2-Canuck]

I agree with Alrock, if the cross member busing is worn or even torn, the diff could rotate up under accelleration, changing the pinion angle and putting pressure on the prop shaft. That might be making the noise you are hearing.

Thanks Big2dabank for your insight

 

[H2-Canuck]

Yep! It's the whole package. Over $400 for the part if you aren't under warranty! I tried to keep my old one so I could come up with a better solution, but they had to send it in since it was done under warranty.

Hey Scarsman before you got your crossmember fixed, did it make any noises similar to mind?
Thank you

 

[[__--MUD--__]]

I agree with Alrock, if the cross member busing is worn or even torn, the diff could rotate up under accelleration, changing the pinion angle and putting pressure on the prop shaft. That might be making the noise you are hearing.

Shouldn't you be able to break torque the truck while someone is beside it looking under to see if anything is moving??

 

[alrock]

Yep, should be pretty easy. It got bad once on Bigunit's H3 when he broke the bolt that the propshaft and diff were so bound up that he needed to get the truck to the dealer on a flatbed.

 

[Scarsman]

Hey Scarsman before you got your crossmember fixed, did it make any noises similar to mind?
Thank you

No, when mine went bad three was just a clunk when I would take off. I could power brake it and make it do it. That's why I was thinking more like bearings. Even though its not leaking, there still could be a bad bearing in the differential.

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[H2-Canuck]

I went onto YouTube and listened to a dozen of trucks with the front differential bearing going bad and none of the sounds were similar to mine. In my earlier post I wrote about my Yukons front differential bearing going bad and it was a rough ride. With a rotating clunking sound and grinding noise, right from start to stop. The noise with the H2 doesn't start till near 30mph + and is a whole different kinda sound.
Usually after 3rd gear kicks in while in acceleration, it will make a moan/groaning/buzzing combination and the second I let off the gas it stops.
The left front humming sound kicks in around the same time and once I hit 80mph it seems to quiet down. But you can still hear it with every rotation of the wheel.
Just wanna thank everyone who offered there help and input.

 

[tomp]

To check cross member bushing, put it in reverse and power brake and the diff will lift up if it is bad. On an H2, even if there is no bushing, it wont cause an issue when driving forward as rear of front diff will press down against crossmember. It only is an issue when going in reverse.

Make sure you diffs arent in locked mode

 

[tomp]

sounds like bad front tires to me. Rotate tires to see if this helps and then have alignment performed and see if there are any worn steering parts.

 

[ArtHummer]

From my experience most of the "whuaming" noises come from the wheels assembly(and not only the tires). You sad that you did changed the tires so the issue is not it. Also what it could be is a bent wheel or even a brake rotor. I've seen this issue only ones. We had a car that was in the accident and the rim was broken. We replaced the rim and a tire but still had that sound after hitting 45-50 mph and little vibration on the steering wheel. We could not figure out what it was and started to change everything one by one(wheel, all ball joints, steering knuckle and all bearing inside it). And after we changed the brake rotor the issue was gone... Visually you couldn't really see it, but when we ran it on the rotor-resurface machine it started to vibrate...

 

[tomp]

The tires are 4 months old. If the steering or suspension has an issue, 4 months on a set of tires can surely make them wear funny. It's worth looking into...

 

[H2-Canuck]

From my experience most of the "whuaming" noises come from the wheels assembly(and not only the tires). You sad that you did changed the tires so the issue is not it. Also what it could be is a bent wheel or even a brake rotor. I've seen this issue only ones. We had a car that was in the accident and the rim was broken. We replaced the rim and a tire but still had that sound after hitting 45-50 mph and little vibration on the steering wheel. We could not figure out what it was and started to change everything one by one(wheel, all ball joints, steering knuckle and all bearing inside it). And after we changed the brake rotor the issue was gone... Visually yououldn't really see it, but when we ran it on the rotor-resurface machine it started to vibrate...

I found out the brake rotors are the originals and only the pads have been changed.
Thanks Arthummer

 

[H2-Canuck]

To check cross member bushing, put it in reverse and power brake and the diff will lift up if it is bad. On an H2, even if there is no bushing, it wont cause an issue when driving forward as rear of front diff will press down against crossmember. It only is an issue when going in reverse.

Make sure you diffs arent in locked mode

Thanks tomp
I will check the diff crossmember tomorrow and the tires r 4months old yes they are, but the sound in the left front was there with the old and brand new tires.

 

[H2-Canuck]

sounds like bad front tires to me. Rotate tires to see if this helps and then have alignment performed and see if there are any worn steering parts.

Thanks tomp on Monday rotation will be done

 

[H2-Canuck]

Hey friends, I checked the crossmember and it looks fine. Today when I was at a stop light I floored on the gas and for the 1st time it took off with some whiplash and was so smooth. Then at the next light it went back to struggle and cause
major vibration while I accelerate, I forgot to mention how at times it's hard to push down on accelerator. Almost feels as if there is back pressure on the gas pedal. Does anyone think it could be a plugged catalytic converter?