zing or shing noise when suspension moves alot

[Jason]

I have a 2000 Chevy Blazer 4.3L V6 2wd auto, and when I hit a bump in the road, or speed bump, and the suspension moves alot up and down, it makes a very loud zing or shing type noise, like to metal plates grinding together, (kinda) and it only does it when I hit a bump or something, not when normal driving.

I think it might be a U joint but anyone got any ideas???

Topic

[Tom]

If you have leaf springs in the rear, check for damaged, or missing spacers between the ends of the leaves. They are only plastic, and often crack and fall apart allowing the end of one leaf to rub against the longer leaf above it. It tends to kind of polish the area where it rubs all the time during normal driving, but when you hit bigger bumps, the leaves move farther, and it will scrape against rusty metal that it doesn’t normally hit, making plenty of noise in the process.

[Jason]

Ill look them up and locate them if i have any and look at them… But if I dont have leaf springs??? any other ideas?

[Tom]

Rear upper shock mounts. They are under the carpet in the rear. Pull the carpet back and have a look at them. If there is little to no rubber left, or what is left looks all torn up and rotted apart, that might be the source of your noise. I would replace shocks at the same time if I were doing the mounts.

I just checked, and the 2000 Blazer does indeed have leaf springs in the rear.

[Jason]

Thanks for the ideas Ill go and look and see what I find out

[Author]

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