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Sporadic clanking sound at high speeds (98 Blazer 2dr / 2wd)

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  #1  
Old 01-02-2008, 12:31 AM
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Default Sporadic clanking sound at high speeds (98 Blazer 2dr / 2wd)

I'm experiencing sporadic clanking or bangingsounds at speeds above 45mph. The faster I drive, the more frequent the noise occurs. Although I'm notpositive, I believe it's coming from the front end. I don't feel any vibrations in the steering wheel and acceleratingor turning makes no impact on the noise.Also,it's not a consistent/rythmicsoundsuch as a nail in a tire (clank, clank, clank, clank...).Rather, itsounds very similar to a couple rocks in a dryer (clank.... clank clank......... clank... clank clank clank).I've taken it to2 repair shops without success. Sometimes you hear it at 40mph but sometimesit won't appear until 65+.

Any ideas?
 
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Old 01-02-2008, 12:51 AM
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Default RE: Sporadic clanking sound at high speeds (98 Blazer 2dr / 2wd)

it could be a few things if its like mine i have had u-joints click at speeds like that or wheelbearing click kinda tick sound. ive even had the fan shroud go into my fan when my motor would slightly move idk i hope this helps im sure somebody on here knows
 
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Old 01-13-2008, 06:56 AM
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Default RE: Sporadic clanking sound at high speeds (98 Blazer 2dr / 2wd)

agibson, thank you for the quick reply! I took it to a 3rd shop and had them specifically look at the u-joints. Instead of the joints, they recommended replacing: 2 motor mounts, 1 transmission mount, 2 lower ball joints, idler arm, center link, and an upper control arm bush kit for a grand total of $1,400. I don't doubt the idler arm or ball joints because I've experience loose steering and occassional clicks while making sharp parking turns. The motor & transmission mounts are new to me though.If it were a mounting problem, I'd haveassumped some noise whiledriving over bumps (nothing).Anyone else have problems with those items?And which problem orcombination ofproblems is the most likely cause of theclank / rattle at 60mphs?
 
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