Knocking noise on 87' Bronco.


Old 08-19-07, 01:42 PM
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Angry Knocking noise on 87' Bronco.

I have a 1987 bronco, 25,000 on new 351W, automatic.

I recently started hearing a knocking noise coming from from underneath my truck while driving. Its a constant noise that speeds up while I speed up. I thought it was a U-joint, but its not. The only thing I can think of is its in the axle from the front to the transfer case. When I get under there and turn it slightly I hear a knock, but I am not sure if that is suppose to happen or not. Please help, I have small patience for knocking and squeaking noises on cars.
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Old 08-19-07, 02:49 PM
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Does it make this noise when vehicle is in park?
Old 08-19-07, 07:09 PM
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No, just when driving. I thought it was the brakes but I checked that out today. No idea when it started but its a constant knocking. I am at my wits end.

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