2001 Chevy Suburaban 1500 4x4 Vibration 70MPH

[02suburbanZ71]

02sub,

 

I got my straps at O'Reilley's Auto Parts. They had a set there for $6.xx dollars. So far its great.

I will get under there tomorrow and check it again.

We leave for a 2000 mile road drip on Sunday. Glad I got it fixed before that.

 

It all make sense now, but never in a million years would I assume the straps were bad.

link:

http://www.oreillyauto.com/site/c/detail/PRE0/53010/01464.oap?year=2001&make=Chevrolet&model=Suburban%2B1500&vi=5015704&ck=Search_universal+joint+-+clamp%21s%21strap_5015704_659&keyword=universal+joint+-+clamp%21s%21strap

 

I still don't understand what you replaced. Can you upload a pic or explain further please

[1500j]

If you go to the link I posted there is a pretty good picture.. There are 4 bolts and 2 steel straps that hold the rear U Joint into the rear yoke at the rear end. Those two straps were stretched out or wore and would not hold the u joint tight into the rear yoke.

Some rear yokes have a cast cap that holds the U joint/driveshaft into the rear yoke as well....

I added a pic from the net showing a strap in place.

I put 2000 miles on last week without any harmonic vibrations like I had before.

[Jsdirt]

I've never seen or heard of straps wearing out - someone at some point in the truck's life must've failed to tighten the strap bolts, causing the U-joint to slam all over the strap for a while ...

[Doug_Scott]

I've never seen or heard of straps wearing out - someone at some point in the truck's life must've failed to tighten the strap bolts, causing the U-joint to slam all over the strap for a while ...

 

Same here. Can't see how they would ever stretch on their own. The only way I can think of is that at one time someone had all the shafts out and swapped the straps by not knowing to keep parts where they belong, so no swapping occurs. With these being loose, that would make the other spot that uses those straps are going to be tighter than they used to be. If the OP has the old straps still, and feels energetic, he could swap the straps with the other location that also has the straps and see if the straps are now the right size.