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post #1 of 9 (permalink) Old 06-12-2013, 07:32 AM Thread Starter
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Intermediate Shaft - Part #'s and Questions..

So I posted about a knocking noise while braking a little while back...

2008 Chevy Cobalt LT 2.2L 2 Door

Symptoms - Slight Vibration and loud clunking ONLY while moderate (normal) braking from speeds 65ish MPH down to 40MPH. No noise while braking from 75 down to about 68. The noise stops once the braking speed goes below 40 MPH. The clunk is in the front end, sounds like it could be in the steering system.

I was advised per a single post on here that it could be the intermediate steering shaft (100K miles on the car and I have not replaced it).

Do you agree, disagree?

If you think it is indeed the shaft, does anyone have a part # for the new/revised steering shaft that GM recently released?

Any thoughts on the Dorman Intermediate steering shaft?

If you don't think its the intermediate steering shaft, any other thoughts?

Thought maybe the brand new rotors were bad, but with the vibration only in that mid 60 to 40 range - just confusing me.

Thank you! I really appreciate any and all help
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post #2 of 9 (permalink) Old 06-12-2013, 08:20 AM
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Don't think it's the intermediate shaft. The latest and only version is 15800140

15800140 | eBay

Sounds like your lower control arm is lifting and hitting the subframe when applying brakes. I would check the pancake bushing first.

ACDelco Advantage 46G9211A Control Arm Bushing Kit | eBay

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post #3 of 9 (permalink) Old 06-12-2013, 08:36 AM Thread Starter
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Thanks for the reply.

The last time I had checked (2 weeks ago) the bushing was still in its place when the car was jacked up. It definitely showed some wear, but it was not sitting on the subframe as typically seen with the lca bushing failure. I will put a pry bar under the control arm tonight to check for movement in the pancake bushing.

I knew they would knock when going over the slightest of bumps, but I didn't know they would move when braking too.

Thanks for the tip.


With regards to the steering column - that was the only part # i could find too, however I saw on another forum someone posted about a revised steering column, but didn't mention a part number. GM tech on the forum didn't confirm or deny a revised part, just simply stated some warranty info as usual.

Thanks again!
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post #4 of 9 (permalink) Old 06-14-2013, 07:26 AM Thread Starter
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Control Arm Bushing

So I finally got under the car and checked the LCA bushing. Indeed, it has come loose.

Any thoughts on if I would be okay to just replace the bad bushing with 100k miles on the car?

Or would it be highly beneficial to replace both LCA's due to middle bushing and ball joints?

Struts are on their way to needing to be replaced, the strut mounts have clearly been rounded out as I can hear the rattle when going over the smallest bumps.
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post #5 of 9 (permalink) Old 06-14-2013, 07:42 AM
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That is almost a hard decision. Myself I would replace the whole control arm. The extra you pay you save in time and labour.

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post #6 of 9 (permalink) Old 06-14-2013, 08:28 AM Thread Starter
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Agreed. When I replaced the right lca bushing (just over a month ago) it took two hours of swearing and a torch to get the old bushing out and the new in.

Compared to 5 minutes to remove and replace the LCA from the car.

I am thinking about going with the Moog Problem solver LCA's. Pricey compared to the rest but I feel like they'll hold up a lot better, just not any reviews from what I can find. Only time will tell.

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post #7 of 9 (permalink) Old 06-14-2013, 09:18 AM
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How much? Not bad full bushing and greaseable ball joint.

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post #8 of 9 (permalink) Old 06-14-2013, 10:25 AM Thread Starter
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The cheapest place I can find them seems to be rockauto. 141 shipped to my door.
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post #9 of 9 (permalink) Old 06-14-2013, 10:31 AM
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Rockauto is a great place. Ordered a bunch of stuff from them. I'd highly recommend it.
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