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Why does my 1981 GMC 4x4, 350, 4 speed manual shift, make ...
Sent to Car Experts October 27 10:52 PM

Why does my 1981 GMC 4x4, 350, 4 speed manual shift, make a growling noise and cause my gear shift lever to chatter out of control whenever I accelerate at around 50 MPH or more. This all started happening after I had a lube and oil change done at Wal-Mart's auto service center. At first I thought it might be the U-joints, but I manually checked them all and they all seemed very tight and fine. "No slack" But I still get a clunking sound when I try to rotate my driveline back and forth when it is in gear.

 

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1981 GMC 4x4 manual 350

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just looking and listening and feeling

Customer (name blocked for privacy)
Status:  Closed   Value: $15
Answer
October 27 11:04 PM (11 minutes and 14 seconds later)
         
ACCEPTEDCheck Mark

Hello,

Hand checking your u-joints don't always work. If a joint seizes you will not have any play by a hand check. If they seize they will not move or flex causing stress on the driveline. If you are getting a clunk from the driveline and vibration, I would check the u-joints a little closer.

Hope this helps.....PLEASE ACCEPT

Thanks, Dean

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Dean -- Auto Service Technician -- 100% Positive Feedback on 216 Car Accepts
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