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Grinding noise when driving Chevy Tahoe
andrew1968
Member Posts: 2
I have an 04 tahoe with 52,000 on it. it has full time 4wd that cannot be turned off. my question is when i am driving and barely pushing on the gas i hear a grinding noise. it sounds like a brake pad needs replaced but its not that I checked all four corners. when i let off and coast it goes away. from what I can tell it is comming from the left front. it is not a constant grind but almost like half of a tire revolution grinds and the other half is fine. also please tell me how to fix the steering shft chatter. thank you
See Also
Symptoms of a Worn Wheel Hub Bearing
See Also
Symptoms of a Worn Wheel Hub Bearing
0
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Comments
Regardless, it could be a bearing, maybe, though I'm not sure why it might come and go with gas/coasting.
As for the steering shaft, the latest procedure from GM is to disconnect the lower end and stroke it in and out to distribute the grease inside--compared to manually lubing them, or replacing them. It's another temporary fix, but that's the latest directions from GM to dealers. Here's more on it:
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Subject: Clunking Noise Under Hood and Can Be Felt in Steering Wheel and/or Steering Column (Exercise/Stroke Intermediate Steering Shaft Assembly) #00-02-35-003L - (11/29/2006)
Models: 2002-2006 Cadillac Escalade Models
1999-2007 Chevrolet Silverado Models (Classic)
2000-2006 Chevrolet Suburban, Tahoe Models
2002-2006 Chevrolet Avalanche
1999-2007 GMC Sierra Models (Classic)
2000-2006 GMC Yukon, Yukon XL Models
2003-2006 HUMMER H2
Attention: This Service Bulletin DOES NOT include Mid-Size Utilities such as Buick Rainier, Chevrolet TrailBlazer Models, GMC Envoy Models or Oldsmobile Bravada. Refer to Service Bulletin 02-02-35-006A or newer for Mid-Size Utilities.
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This bulletin is being revised to change the service procedure. Please discard Corporate Bulletin Number 00-02-35-003K (Section 02 -- Steering).
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Condition
Some customers may comment on a clunk-type noise coming from under the hood that also can be felt in the steering wheel. These conditions may be more noticeable when turning at low speeds on rough road surfaces.
Diagnostic Tips
Use the information below to help diagnose the source of the noise.
• Frame Snap and/or Popping Type Noise -- A frame snap or popping type noise can be duplicated on rough or smooth road surfaces with steering wheel input to the left or the right. This type of noise can be HEARD and is typically louder with the windows rolled down. For additional information, refer to Corporate Bulletin Number 03-08-61-002F or newer -- Snap/Popping Type Noise Coming from Front of Vehicle (Remove Front Crossmember, Change Fastener Orientation)
• Intermediate Shaft Clunk -- Intermediate shaft clunk is heard and FELT in the steering wheel and/or steering column area, typically while driving on rough road surfaces with steering wheel input.
Correction
DO THIS
DON'T DO THIS
Fully Exercise/Stroke I-Shaft 5-6 times
DO NOT REPLACE the following intermediate shaft P/N's:
P/N 88965505
P/N 89060582
P/N 19149105
DO NOT LUBRICATE the Intermediate Shaft (P/N 26098419)
Engineering has determined that fully exercising/stroking the I-Shaft will provide similar results as lubricating.
Disconnect the I-Shaft underhood.
Fully exercise/stroke the I-shaft a minimum of 5-6 times.
Reconnect the I-shaft.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
E9446
I-Shaft Exercise/Stroke
0.2 hr
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
I also noticed the slight vibration when turning or taking off at low speeds but then it seems to go away.
controls
1 - Requires 4WD models. - Not available with (JL4)
StabiliTrak, vehicle stability enhancement system. (NP8)
Transfer case, open differential, 2-speed
1 - Included and only available with (JL4) StabiliTrak,
vehicle stability enhancement system. (NR4)"
It looks like you had to have AWD for stabilitrak to work. You also couldn't have a locking rear diff with stabilitrak.
A second version of a 4WD transfer case is a full-time 4WD transfer case. This style of transfer case has an open center differential to allow for different speeds between the front and rear axles and operates similar to an AWD system. This transfer case can be locked to operate like a Part-Time 4WD transfer case (no difference between front and rear prop-shaft speeds) and/or uses a traction control system to assist in low traction situations. These transfer cases also have a selectable low range. An example of this type of 4WD is the H2. RPO code is NR4.
What yours has might be different than mine.
Most AWD vehicles mean that it is in 2 wheel drive when driving on normal dry pavement, when it feels a slippage it shifts the transfer case into AWD.
On my 2004 Tahoe I can shift from 2Hi to 4Hi while moving. But I have to be stopped and in nuetral to shift into 4Lo.
I hope that this helped?
What was the solution? I have an 04 full time AWD and aloso experieice a grinding noise when under power, which also disappears when letting off the gas.
Suggestions?
It could be that when they bolt it on you have axial forces between transmission input shaft and torque converter, which then cause bearings fail in transmission, or something similar.
Car shops just keep replacing the transmission but the root cause probably is with bad fit / tolerance between the transmission and engine block / torque converter.
Also need to make sure the drive shaft from transmission to rear differential is not axially loaded.
Arrie
Ok! Now my transmission shifts wierd. It doesnt down shift when you are driving in parking lots at slow speeds. Its like your driving a stick and you dont shift out of first gear. Then when you are slowing down from higher speed like pulling into a parking lot or driveway it shifts into the first gear. I have taken it in twice and they say nothing is wrong with it. Transmission has slipped occasionally as well.
Transmission does slip occasionally. They cant figure that out either!
Many many problems with this vehicle too many to list.
I dont know if you read my other post but the grinding noise turned out to be the front differential bearings. Also when the burb was on the lift the mechanic noticed the all wheel drive wasn't working too. So my transfer case was burnt. Just so you know it took a good mechanic to figure it out. I took it to another dealership and they told me it was my tires. Good thing I am not an idiot. Hopefully you can get it figured out. Good luck!