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09/05/11

I own a 2005 97X 4.2i with just under 95000 miles, tires are matching and have about half their tread, all services are up-to-date and mechanical issues have always been addressed shortly after identified. I had GM extended warranty that just expired on July 11th.

Over the last year I have been experiencing and intermitting drag or binding issue in the front wheels while making a turn, mostly in reverse, the binding released after I started to straighten the wheel. I took the 97 to a local Saab dealership several times over the last year to address the issue but the tech was never able to get it to bind when they took it out for a road test. They followed all recommendations that GM/SAAB recommended to include replacing fluid in the rear axle but the problem persisted; this issue is well documented in their system.

Over the last couple of weeks, I started hearing a clanging (metal against metal) and thumping sound when I engaged the 97 in drive and reverse. I took the 97 to a VIP and they diagnosed it as a transfer Case issue and suggested that I take it to a dealership. The tech that diagnosed it identified himself as a GM mechanic for 30 years, for whatever that's worth, he also stated that the transfer case is the same as in the Chevy Trailblazer (as are most other parts in the 97X) and is well tested and has very few issues. After explaining the chronic problem with the binding and dragging in the front wheels, he felt that the Transfer Case issue was related.

I'm going to take the 97 to a local dealership on Tuesday, given today's Labor Day, and I hope I can get GM to address the issue under the expired warranty, given that the dragging problem had been identified, documented and never resolved.

Has anyone experienced this problem and has anyone had experience working with a GM extended warranty regarding an issue previously identified after the warranties expiration.

Thanks
Mark
 

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OK I'll try a quick help post...

Google & search the Trailvoy site for these items too...

My 97x had transfer case replaced for the TSB and the front wheel "Crow Hopping" which sorry to disagree with your mechanic is a common problem with these GM SUVs.

As well the bump clunk ...when stopped or at light start out... its some back lash in drive line... again another TSB.

Both done under warranty no cost to me.
 

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For what it's worth, I had my Bump/clunk repaired under the CPO warranty last week. Feels like a new drive train now. :D
 

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OK I'll try a quick help post...

Google & search the Trailvoy site for these items too...

My 97x had transfer case replaced for the TSB and the front wheel "Crow Hopping" which sorry to disagree with your mechanic is a common problem with these GM SUVs.

As well the bump clunk ...when stopped or at light start out... its some back lash in drive line... again another TSB.

Both done under warranty no cost to me.

what is the long term effects of the bump clunk ?
 

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what is the long term effects of the bump clunk ?
Not sure if there would be any long term mechanical issues per say.... but I found it very unsettling at times.... It was intermittent to some extent but I would be sitting at a traffic light and after about 25 seconds I would feel a pronounced BUMP, then CLUNK under the center of the truck. The first couple of times it happened, I thought someone tapped my bumper from behind.
 

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I have had it happen a few times, then I went in for my regular service and had the fluids changed in the front dif, rear dif, transmission and the transfer case...

after I did that service it has NOT done it once since... that was 40k ago
 

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The Bump/Clunk fix involves replacing output shaft and drive shaft yoke in the transfer case.

#07-04-17-001C: EI07148 - Bump/Thump Noise Heard/Felt from Driveline or Rear suspension After Braking (Replace Output Shaft/Drive Shaft Yoke) - (Aug 25, 2008)

Condition

Some customers may comment on a bump or thump noise heard from the rear suspension or felt in the floor. The information below will affect vehicles with G67 Automatic Level Control rear suspension. This noise will typically occur at traffic lights after rapid stops. This noise is due to a combination of the rear electronic suspension attempting to level the vehicle and the driveline becoming unbound after these rapid stops.

Correction

Contact your DVM (District Service Manager) for approval prior to making any repairs. 4WD Vehicles - Replace the Output Shaft of the Transfer Case and the Drive Shaft Yoke and grease with P/N 12345879 (in Canada, use P/N 10953511) . Reinstall and evaluate operation. 2WD Vehicles - Replace the Output Shaft of the Transmission and Drive Shaft Yoke. Reinstall and evaluate operation.
 

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09/05/11

I own a 2005 97X 4.2i with just under 95000 miles, tires are matching and have about half their tread, all services are up-to-date and mechanical issues have always been addressed shortly after identified. I had GM extended warranty that just expired on July 11th.

Over the last year I have been experiencing and intermitting drag or binding issue in the front wheels while making a turn, mostly in reverse, the binding released after I started to straighten the wheel. I took the 97 to a local Saab dealership several times over the last year to address the issue but the tech was never able to get it to bind when they took it out for a road test. They followed all recommendations that GM/SAAB recommended to include replacing fluid in the rear axle but the problem persisted; this issue is well documented in their system.

Over the last couple of weeks, I started hearing a clanging (metal against metal) and thumping sound when I engaged the 97 in drive and reverse. I took the 97 to a VIP and they diagnosed it as a transfer Case issue and suggested that I take it to a dealership. The tech that diagnosed it identified himself as a GM mechanic for 30 years, for whatever that's worth, he also stated that the transfer case is the same as in the Chevy Trailblazer (as are most other parts in the 97X) and is well tested and has very few issues. After explaining the chronic problem with the binding and dragging in the front wheels, he felt that the Transfer Case issue was related.

I'm going to take the 97 to a local dealership on Tuesday, given today's Labor Day, and I hope I can get GM to address the issue under the expired warranty, given that the dragging problem had been identified, documented and never resolved.

Has anyone experienced this problem and has anyone had experience working with a GM extended warranty regarding an issue previously identified after the warranties expiration.

Thanks
Mark
Was your transfer case problem felt? I can feel and hear a GRRRR when I accelerate and take my foot of the gas. Could It be the bearings in the universal joint? I was told by a Saab C Member that it could be it.
 

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09/05/11

I own a 2005 97X 4.2i with just under 95000 miles, tires are matching and have about half their tread, all services are up-to-date and mechanical issues have always been addressed shortly after identified. I had GM extended warranty that just expired on July 11th.

Over the last year I have been experiencing and intermitting drag or binding issue in the front wheels while making a turn, mostly in reverse, the binding released after I started to straighten the wheel. I took the 97 to a local Saab dealership several times over the last year to address the issue but the tech was never able to get it to bind when they took it out for a road test. They followed all recommendations that GM/SAAB recommended to include replacing fluid in the rear axle but the problem persisted; this issue is well documented in their system.

Over the last couple of weeks, I started hearing a clanging (metal against metal) and thumping sound when I engaged the 97 in drive and reverse. I took the 97 to a VIP and they diagnosed it as a transfer Case issue and suggested that I take it to a dealership. The tech that diagnosed it identified himself as a GM mechanic for 30 years, for whatever that's worth, he also stated that the transfer case is the same as in the Chevy Trailblazer (as are most other parts in the 97X) and is well tested and has very few issues. After explaining the chronic problem with the binding and dragging in the front wheels, he felt that the Transfer Case issue was related.

I'm going to take the 97 to a local dealership on Tuesday, given today's Labor Day, and I hope I can get GM to address the issue under the expired warranty, given that the dragging problem had been identified, documented and never resolved.

Has anyone experienced this problem and has anyone had experience working with a GM extended warranty regarding an issue previously identified after the warranties expiration.

Thanks
Mark


FWIW, I am chasing problems on virtually same vehicle (my daughter's Saab, actually) and had similar problems. Changing fluids in transfer case and rear diff seemed to have it solved. The rear diff on hers is a 'limited slip', and it uses TWO clutch packs - on pack on each side of the diff. The transmission specialist said they are prone to sticking. He said the fluid in the rear diff was black, and will need to be changed multiple times.

-
 

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#PIP3928A: Bind Or Shudder On Turns (Crow Hop) - keywords auto AWD chatter vibration - (Dec 18, 2006)

Subject: Bind or Shudder on Turns (Crow Hop)

Models: 2004-2007 Buick Rainier
2002-2007 Chevrolet Trailblazer
2002-2007 GMC Envoy
2002-2004 Oldsmobile Bravada
2005-2007 Saab 9-7X

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

Condition/Concern:
Bind/shudder (crow hop) on turns or feels like vehicle is stuck in 4 wheel drive. This concern can effect Buick Rainier Oldsmobile Bravada and Saab 9-7X or Chevrolet Trailblazer and GMC Envoy
when in auto 4x4 mode.

Recommendation/Instructions:
For the 2002-2003 Bravada or the Envoy and Trailblazer (in auto mode only) please reference the latest version of tsb 02-04-21-008. If the tsb has already been performed or the vehicle falls after the tsb use the below diagnostics to isolate an electrical or mechanical concern.

1. Disconnect the encoder motor electrical connector. If the condition is gone, then proceed to step 2. If the condition is unchanged, then skip to step 4.

2. Reconnect the encoder motor connector and swap the wheels and tires from an identically built vehicle that does not exhibit the concern and re-evaluate the condition.

3. If disconnecting the encoder motor connector corrects the condition and swapping tires from another identically built vehicle does not improve the concern, snap shot the TCCM data and monitor the prop shaft speed sensors for spikes or dropping out.

4. For Bravada Rainier and 9-7X remove the encoder motor and evaluate if the concern is gone replace the encoder motor. For the Trailblazer and Envoy remove the encoder motor and with the tech 2 in powertrain, select "Special Functions", next select "ATC Output Controls", next select "Engage Front Axle". From this screen lock the front axle and evaluate. If the concern is gone replace the encoder motor.

5. If none of the above change the condition, remove the front prop shaft and evaluate. If the concern is gone suspect a possible internal transfer case concern. If the concern is still present with the prop shaft removed suspect either a locking differential or steering related concern.

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.
 

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"Bump/clunk"

After leaving my 9-7x (2006 5.3i) for about 2 days with a dead battery, the air springs emptied out, leaving the rear end about 4-5 inches below normal...when I replaced the battery and turned the car on, the compressor ran for about 2 minutes and levelled the rear back out...while it was raising the rear, the "Bump/clunk" happened and I saw it actually happen...it is a set of 2 clunks...it seems to be some sort of set point in the air spring that fills then "clunks" or sets. So when you stop at a light, it will settle to this point and you will experience a bump or clunk. It is just the air suspension settling to the set point.

Just FYI lol

-Shane (LA)
 

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It is just the air suspension settling to the set point.
It's a little more than that.... a binding of the driveline that's aggravated by the air suspension. The bump/clunk is the unbinding. The fix prevents the binding with the transfer case yoke that slides instead of binding.


"Some customers may comment on a bump or thump noise heard from the rear suspension or felt in the floor. The information below will affect vehicles with G67 Automatic Level Control rear suspension. This noise will typically occur at traffic lights after rapid stops. This noise is due to a combination of the rear electronic suspension attempting to level the vehicle and the driveline becoming unbound after these rapid stops. "
 

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this is a common issue, its the transfer case sensor, module computer, and the transfer case itself based on what you describe with the reverse binding. also if your going fast and brake verrrrrry fast like if your going to miss a street turn and it does a binding and almost stalls its also affecting your awd. this is a HUGE repair price, i would fight to get it payed for under your expired warranty. this was the only reason why i recently got rid of my 9-7x and got a 9-5. they also did the "CANT DUPLICATE DESCRIBED ISSUE" to me, warranty ran out and then all of a sudden they are telling me its huge issue and it needs to be fixed, for almost 3 grand... fight for it to be free, or get rid of it, FAST. it all goes downhill from there with this issue.
 
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