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1968 Deville convertible
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115 Posts
Discussion Starter #1
Well I have this slight thumping noise and when I mean slight you have to turn the steering wheel like a half an inch to hear it but you have to turn it back and forth real quick I mean like really quick like a little kid playing with the wheel but again half an inch or so not even enough to move the wheels. There is no noise when the car is off and does not make a sound when driving or fully turning. I was thinking maybe a bushing or the intermediate steering shaft. I had the noise BEFORE I replaced the control arm and bushings, low outer tie rod and inner tie rod. So it's definitely not that. My power steering pump does make a noise but it seems to be more steering related. I can try to get a video but not sure if you would be able to hear it. I have not had a chance to get underneath it while someone moved the steering wheel I will do that this weekend I came down with something so I am just resting but would like some ideas.
 

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2006 DTS perf
2006 DTS Performance Lux III
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1,046 Posts
I'd go with the intermediate shaft. Not an easy job to replace unfortunately.
 

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Registered
1968 Deville convertible
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115 Posts
Discussion Starter #3
Thanks, tomorrow I will finally get under it and see what it is. I haven't had time just yet
 

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2011 DTS Premium w/1SD | 1999 Deville Base (RIP @179K Miles)
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401 Posts
FWIW, I have a 2011 DTS and I think I have the same issue. I just had an alignment so there's no play in my front end. When I shake the wheel and hear the noise with it, The wheel moves too; So I cant see anything loose.
 

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742 Posts
This bulletin will explain what you are hearing

Steering - Steering Column Clunk Felt/Heard on Turns
Bulletin No.: 06-02-35-010
Date: May 09, 2006
TECHNICAL Subject:
Clunk Felt/Noise Heard From Steering Column, Steering Gear and/or Front of Vehicle During Maneuver and/or Steering Wheel Rotation (Replace Intermediate Shaft)
Models:
2001-2004 Cadillac Seville - with RPO JL4 (Active handling - on my baby)
2001-2003 Oldsmobile Aurora
2000-2005 Pontiac Bonneville
Attention: This bulletin ONLY applies to the above listed vehicles. All other cars with a similar condition should refer to Corporate Bulletin Number 01-02-32-001G.
Condition:
Some customers may comment on a clunk type noise coming from the front of the vehicle while driving during a turning maneuver. This condition may also be felt through the steering wheel when the vehicle is stationary and the wheel is rotated from steering stop to steering stop. Some vehicles may only exhibit the noise once for every 360°of wheel rotation. On all other vehicles, this clunk noise will be noticed during low speed acceleration or deceleration, typically in light turns of the steering wheel.
Cause:
This condition may be caused by inadequate lubrication of the steering intermediate shaft which results in a slip stick condition possibly resulting in the clunk noise.
Diagnostic Tip
Important: This condition is commonly misdiagnosed as originating in the steering gear and has resulted in the replacement of numerous steering gears without correcting the concern.
Engineering Investigation shows that numerous steering gears have been misdiagnosed and replaced. The investigations shows that if the technician incorrectly diagnoses the steering gear as the cause of the noise and/or clunk during replacement of the steering gear, the technician may stroke and/or cycle the I-shaft, distributing the original grease in the I-shaft. This distribution of the original I-shaft grease temporarily may eliminate the I-shaft clunk so that the technician believes the noise and/or clunk is corrected with the steering gear replacement and returns the vehicle to the customer. After the customer drives the vehicles for several miles and dissipates the original grease, the noise may return.
Attempt to duplicate the customer's concern and isolate the I-shaft by following the procedure below:
1. Locate a large area (parking lot) where the vehicle can be turned in a tight circle.
2. Turn the steering wheel to the right and/or left all the way to the steering lock, then off the steering lock a 1/4 turn.
3. Drive the vehicle approximately 5 km/h (3 mph) in a circle, preferably over rough pavement or seams on the road surface.
4. If a clunk is felt in the steering wheel, the MOST likely cause is the I-shaft - not the steering gear. Continue with the correction.
Correction
Important: The replacement steering intermediate shaft is physically different in appearance than the original. However, the vehicle's ride performance will not be affected.
 

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Go ahead, blame me. Everybody does 🙄
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7,847 Posts
Had this ^^^^ on my '01 SSEi.
The dealer first attempted to lube the intermediate shaft in an effort to alleviate the problem, but ultimately ended up replacing it.
 
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