Rear Brake/Axle Groan...

[f5fstop]

Originally Posted by Hmmm3

I'm pretty sure that f5fstop had told me long ago that each service dept should have at least one set of Chassis Ears. I guess it depends if they know how to use them, too. ()

That, and if they know where they are in the tool room.

Hmmm3: Send me the last eight digits of the VIN and I can tell you the build date.

442: Just tell the dealer you had a friend who had the same type of noise, and the dealer used chassis ears, fixed the problem by replacing the T/case.

[f5fstop]

I just did some investigation and here is a PI that was issued:

Subject: Internal Transfer Case Noise - keywords grind growl rattle #PIP3467B -



Models: 2006-2007 Hummer H3




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PI is being updated to add model years. Please discard PIP3457A.


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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Any type of internal transfer case noise.

Recommendation/Instructions:
Engineering is conducting an investigation on internal transfer case noise. If the abnormal noise can be isolated to the transfer case using conventional methods, please contact the Technical Assistance Center for further instruction and diagnosis.

Note:: Remember do not operate the vehicle in unlock (4hi) mode on the hoist as damage to the planetary gear set may result due to an over speed condition.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

[Nextlife]

Hummmm.... Mine does this too. 14k miles. Thought it was just rust on the rotors or something. Seemed like it went away with a really hard brake for me... But it does/has come back on and off. I'll be watching this thread to see what you guys find out.

[fourfourto]

Note:: Remember do not operate the vehicle in unlock (4hi) mode on the hoist as damage to the planetary gear set may result due to an over speed condition.


Does that mean you can operate it in 4 hi lock or 4 low lock up on the lift?
I would think it will also due damage.


when I go to bed and shut my eyes and its all quite. I hear grrr grrr grrr

Its stuck in my freekin head

[f5fstop]

Originally Posted by fourfourto

Note:: Remember do not operate the vehicle in unlock (4hi) mode on the hoist as damage to the planetary gear set may result due to an over speed condition.


Does that mean you can operate it in 4 hi lock or 4 low lock up on the lift?
I would think it will also due damage.


when I go to bed and shut my eyes and its all quite. I hear grrr grrr grrr

Its stuck in my freekin head

Won't cause an overspeed condition. Besides, the sound is not noticeable on a hoist. Has something to do with the dynamic weight shifting during heavy braking. My guess, it might be a shift fork...

[Hmmm2]

Originally Posted by fourfourto

when I go to bed and shut my eyes and its all quite. I hear grrr grrr grrr

Its stuck in my freekin head

I know exactly what you mean.

[f5fstop]

Originally Posted by Nextlife

Hummmm.... Mine does this too. 14k miles. Thought it was just rust on the rotors or something. Seemed like it went away with a really hard brake for me... But it does/has come back on and off. I'll be watching this thread to see what you guys find out.

Believe me, if it was the t/case, the noise would not go away with a very hard stop. Rust on the rotors will do this, but once burned off, the noise will go away. Rotors are cast iron, so rust while sitting in a rain storm is normal. But applying the brakes will burn off the rust on the firepath.

[Hmmm2]

Originally Posted by f5fstop

Hmmm3: Send me the last eight digits of the VIN and I can tell you the build date.

f5fstop ... the last digits of my vin# are:68111746.

Thanks!

[f5fstop]

Originally Posted by Hmmm3

f5fstop ... the last digits of my vin# are:68111746.

Thanks!

06/22/2005

Damn, you have had more rear brake pads replaced in that vehicle, than I have ever replaced since disc brakes were installed.

Go tell the dealer to put the chassis ears on the t/case, or have a technician strap himself to the bottom of the vehicle with tie straps with his ear on the t/case and listen to see if the sound is coming from the case.

Take that bulletin I posted, and tell them to fix the damn thing right. Tell them you know someone who had the same noise, and the noise went with the t/case.

Good luck.

[fourfourto]

Hmmm3 has the same built day as me
F5 when was yours built?

Im going to call the dealer and bring it in on friday. grrr

[f5fstop]

Originally Posted by fourfourto

Hmmm3 has the same built day as me
F5 when was yours built?

Im going to call the dealer and bring it in on friday. grrr

Mine was built: 04/27/2005. It was almost considered a captured test vehicle. Only trips to the dealer for H3 service was the top off of the t/case fluid, a new TCCM, and then I had the t/case replaced. For such an early built vehicle, I sure did luck out.

[Hmmm2]

Originally Posted by fourfourto

Hmmm3 has the same built day as me

[fourfourto]

I called the dealer today .I emailed them link to video/sound file they could not open it.they said links and attachements are blocked.Im bringing it in friday,they said they have the ears to locate were sound is comming from.They also said the trans case buletin shows no fix ? I said replacment would fix it if thats the problem,he said he dont know?
I will bring my camera with the video/sound file on it also when I go in and hang out to see what happens.

I do wonder were the noise is comming from hopefully they can locate it.


F5 is there any other info I can give them?

[f5fstop]

Originally Posted by fourfourto

I called the dealer today .I emailed them link to video/sound file they could not open it.they said links and attachements are blocked.Im bringing it in friday,they said they have the ears to locate were sound is comming from.They also said the trans case buletin shows no fix ? I said replacment would fix it if thats the problem,he said he dont know?
I will bring my camera with the video/sound file on it also when I go in and hang out to see what happens.

I do wonder were the noise is comming from hopefully they can locate it.


F5 is there any other info I can give them?

Noise travels down the driveshaft to the axle and out. That is what I was told today. In my case, the new t/case did fix the problem.