5ktq massive vibration from rear 20-40mph (solved)

[Kurt Deschler]

I was referring to the main drive shaft (prop shaft). It takes a lot to 
make a half shaft vibrate. I had one on my GTI that was bent over 1/2" and 
there was no vibration.
 	-Kurt

On Mon, 8 Jan 2007, L DC wrote:

> Kurt,
>
> By drive-shaft you mean the 1/2 rear drive-shafts, and
> not the main one running from the tranny to the rear
> diff., correct?
>
> Reason I ask is that on the main drive shaft, I have
> seen weights on, but never on 1/2 driveshafts.
>
> -Regards,
>
> -Louis
>
>
>
> --- Kurt Deschler <desch at alum.wpi.edu> wrote:
>
>>
>> The vibration was due to the driveshaft balance
>> weights rusting off and
>> presumably further imbalance from flake rust. I
>> found a good used
>> replacement and the problem is gone. People in the
>> rust belt need to be
>> aware of this issue. The parking brake cables are
>> easy to get to with the
>> drive shaft out and can be easily changed at the
>> same time.
>>
>>  	-Kurt
>>
>> On Mon, 2 Oct 2006, Kurt Deschler wrote:
>>
>>>
>>>
>>> I am trying to isolate the source of massive
>> vibration from the rear of my
>>> 5ktq. The problem is definitely dependant of wheel
>> speed, not engine speed
>>> and comes on hard and fast at 20mph. Problem also
>> occurs with the rear end up
>>> on jacks. I tried adjusting the prop shaft bearing
>> and geasing the U-Joint
>>> and neither helped. I have also ruled out the
>> brakes. Could the rear diff be
>>> bad? It used to weep fluid so it is possible it
>> went dry. The vibration
>>> reasonates the entire back of the car and is
>> enough to rattle your teeth out.
>>>
>>> 	-Kurt
>>>
>>>
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>
>
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