The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - "Rattlesnake" noise after changing U-Joint

Brown Betty · 11-06-2005, 05:08 PM

Hey guys,

This morning I decided to take off my 1-piece driveshaft and change the U-Joints. Under hard acceleration I'll hear a "clunK", so I thought that the U-Joints may be the culprit.

With the driveshaft off the front U-Joint(Tranny) seemed to be in great condition, so I left that one on. The rear one(axle) was stiff, so after fighting with it for over an hour I got the U-Joint changed

Now, this new U-Joint is VERY STIFF, but I still put the driveshaft back on the truck.

I took the truck out for a spin to see if the "clunk" was gone, but it was still there

And now whenever I accelerate my truck sounds like a rattlesnake

Or a Maraca... Your choice

Any ideas guys? I'm guessing it has to do with the U-Joint being very stiff... But I'm stuck there

Thanks,
Darcy

11-06-2005, 05:08 PM	#1
Brown Betty Registered User Join Date: Sep 2005 Location: MB, Canada Posts: 10	"Rattlesnake" noise after changing U-Joint Hey guys, This morning I decided to take off my 1-piece driveshaft and change the U-Joints. Under hard acceleration I'll hear a "clunK", so I thought that the U-Joints may be the culprit. With the driveshaft off the front U-Joint(Tranny) seemed to be in great condition, so I left that one on. The rear one(axle) was stiff, so after fighting with it for over an hour I got the U-Joint changed Now, this new U-Joint is VERY STIFF, but I still put the driveshaft back on the truck. I took the truck out for a spin to see if the "clunk" was gone, but it was still there And now whenever I accelerate my truck sounds like a rattlesnake Or a Maraca... Your choice Any ideas guys? I'm guessing it has to do with the U-Joint being very stiff... But I'm stuck there Thanks, Darcy __________________ '86 GMC Sierra 305/TH-350/Open 3.07 Last edited by Brown Betty; 11-06-2005 at 05:09 PM.