1997 GMC Sonoma Rear Clicking Vibration

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LITLEFIREDUDE49
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  • 1 POST
I have a 97' GMC sonoma extended cab. It's a 2.2L 4 cylinder 2wd manual. It has 63K on it. I replaced the transmission at 55K due to a bad blocking ring for my 5th gear. The truck ran great for about 6K no problems. About 2 thousand miles ago a heavy vibration started when driving in the snow one day. Only at speeds excess of 25mph. A little after the vibrations started I started hearing a clicking noise fromt the rear when I accellerated. The clicking gets faster as I go down the road and slower as I slow. At first the noise only sounded when accelerating from a dead stop, under load. Now it sounds in almost all gears under heavy load, and sometimes when I'm just cruising along. Every now and then the sound is met with a loud clunk from the rear that can be felt all the way through my shifter. The only other way I can describe this sound is the "clank" sounds like a hammer smacking metal... and the "clicking" sounds the same. Just at a much lower volume that eventually speeds up into a screeching noise. It's definatley coming from the rear of my truck and the vibrations are tremendous. Please help...
Dec 1, 2006 at 11:27 PM
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2CARPRO JACK
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  • 11,533 POSTS
I would start by inspecting the u-joints.raise the vehicle in the rear on jackstands and unbolt the driveshaft from the rear end. Turn the rear end by hand feeling for anything that isnt a smooth gear mesh.But i would definitly start with u-joint inspection.
Dec 2, 2006 at 12:25 AM

Suggested Repair

Start by inspecting the U-joints. Raise the rear on jack stands, unbolt the driveshaft from the differential, and turn the rear end by hand to feel for anything other than smooth gear mesh.

Conversation Summary

The owner of a 1997 GMC Sonoma reports heavy vibration above 25 mph, rear clicking that speeds up with road speed, and occasional loud clunks felt through the shifter, especially under load. The expert recommends starting with a U-joint inspection, then unbolting the driveshaft and rotating the differential by hand to check for rough gear mesh.

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