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Old 06-18-2022, 03:49 PM   #1
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Default Chirping sound when wheels spinning above ~15mph

I took the camper top off of my 1988 v6 4x4 the yesterday and I was driving around. Noticed that a loud continuous chirping noise was happening from underneath the car around the center as the wheels spun above 15 mph. Loud enough that pedestrians were looking and noticing it. This is happening both in neutral and first and second gear. It starts at around 15 mph and then continues until I come to a full stop. I lifted the back of the car up and gave the wheels some gas and I could hear it coming from around driveshaft, i dont think its the wheels themselves. The thing I noticed is that I got someone int he passenger seat to try o listen for it and it was not as loud. Thinking it might have something to do with how the truck is now unloaded without the camper top. Any help would be greatly appreciated. Thank you!
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Old 06-18-2022, 05:44 PM   #2
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Check the carrier bearing or the U-joints
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Old 06-19-2022, 12:43 AM   #3
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Sounds like the carrier bearing is going out to me, too.

If you haven't messed with vehicle maintenance much, I'd suggest having the carrier bearing on the driveshaft replaced. They have to be lined up correctly or your truck will wobble.
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Old 06-19-2022, 04:42 PM   #4
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Quote:
Originally Posted by jp2code View Post
Sounds like the carrier bearing is going out to me, too.
I actually replaced the carrier bearing about a year ago when I lifted the truck. Ill lift the back again and see how it feels to double check.

Yesterday I sprayed some lithium grease along the U joints and carrier bearing to see if it would fix my issue but it didnt help. I am noticing though that there is a lot of jerking between shifting from drive to reverse and back so this makes me think it might be one of the u joints. The only thing is when I lift the truck and turn it by hand I dont hear the sound at all. It only happens around 20 mph.
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Old 06-19-2022, 05:42 PM   #5
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Check the U-Bolts on the axle.

They are supposed to be torqued to 120 ft-lbs. They can come loose and cause issues.
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Old 06-24-2022, 06:04 PM   #6
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Check the dust shield at the back of the transfer case. Sometimes the cup part needs to be knocked back on. If it gets crooked, it will rub the round plate on the driveshaft. Just tap it with a hammer to reseat it.
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Old 06-25-2022, 10:26 AM   #7
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It does sound like a carrier bearing problem to me.
Up under the seat, that noise would probably be coming from the tranny shaft.
Center noise, carrier bearing.
Rear noise, U-joint. But you would know that pretty quick. Once a u joint starts to go, it doesn't keep chirping. It starts BANGING on stuff. Almost certainly a carrier bearing problem here.
I would switch out both U-joints and the carrier bearing as well. Just to be safe. If they are factory-original, then they lasted 34 years. Kudos to Japanese engineering.
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Old 06-26-2022, 02:02 AM   #8
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I had a bent brake rotor vent plate cause a chirp once.
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Old 06-27-2022, 05:18 PM   #9
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could it just be the squealer bar on your brakes kicking in?
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