Knocking Sound
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Knocking Sound
Hi everyone. I have a 1997 Ford Ranger, 4 cylinder, 2WD.
I have been noticing a knocking sound when I'm driving at slow speeds. While I don't know for sure the sound appears to be coming from the back of the truck somewhere. At normal to high speed I don't hear anything.
It's not from a recent gas fillup because it's been doing this for a while now with several different fillups. What does it sound like it could be?
I have been noticing a knocking sound when I'm driving at slow speeds. While I don't know for sure the sound appears to be coming from the back of the truck somewhere. At normal to high speed I don't hear anything.
It's not from a recent gas fillup because it's been doing this for a while now with several different fillups. What does it sound like it could be?
Laughing Gas
Joined: Aug 2003
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From: So. Cal.
They can make a variety of sounds, depending on exactly how/how much they're worn. Just crawl under there and grab each end of the driveshaft in turn. Give it a good shake/push/pull. Any detectable difference in movement between one part of the U-joint and the other part means it's bad.
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Joined: Jan 2004
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From: SW Va
If you could be a little more descriptive of the "knock" sound, maybe we could narrow it down some more.
Is it more of a metallic, clank, clink, tink, ping, or more of a dead/dull sounding, clunk thump, bump????
The latter could be suspension, like shocks or rubber bushings, or exhaust hangers.
The former may be driveline, like U joints often make a ping, or excessive differential backlash might make a clink sound, or loose lug nuts mght make more of a rattling sound.
You could put the rear end up on stands & have someone run the engine & driveline, while you do a walk around, "look & listen".
Just some more thoughts for pondering.
Is it more of a metallic, clank, clink, tink, ping, or more of a dead/dull sounding, clunk thump, bump????
The latter could be suspension, like shocks or rubber bushings, or exhaust hangers.
The former may be driveline, like U joints often make a ping, or excessive differential backlash might make a clink sound, or loose lug nuts mght make more of a rattling sound.
You could put the rear end up on stands & have someone run the engine & driveline, while you do a walk around, "look & listen".
Just some more thoughts for pondering.
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Originally Posted by pawpaw
If you could be a little more descriptive of the "knock" sound, maybe we could narrow it down some more.
Is it more of a metallic, clank, clink, tink, ping, or more of a dead/dull sounding, clunk thump, bump????
Is it more of a metallic, clank, clink, tink, ping, or more of a dead/dull sounding, clunk thump, bump????
Sure, I'd have to say it's more of a dull clunk or thump type of sound. When I start to speed up though I can't hear it anymore, that could be because the sound of the engine blocks it out, don't know for sure. When I hear it though it definitely sounds like it's coming from the back somewhere.
I'll take the suggestions here and see if I could get a better idea of what it is.
