Whatever it is , is not going to get better by itself . I have pulled mine to be looked at and would advise the OP to do it as well .
        We agree that it is a bearing inside the transmission and a tear down will make it evident . 
         I should have mine open in a few weeks and report back my findings.   In the meantime I drive on a borrowed Transaxle from the collective hoard  

Sent from my iPhone

> On Oct 22, 2013, at 8:12 AM, mark drillock <mdrillock@COX.NET> wrote:
> 
> The input shaft bearing goes out often enough but when you are driving
> down the road that bearing isn't spinning and can't make noise. When the
> input shaft bearing gets bad you hear it when stopped at a light in gear
> with the clutch pedal on the floor. When you put it in neutral and take
> your foot off the clutch the noise would go way since that bearing would
> then stop spinning. You feel it most when you are stopped and try to get
> reverse, sometimes first too.
> 
> Mark
> 
> ralph meyermann wrote:
>> Pretty sure that my input shaft bearing is loose/going out, but I think
>> there are other worn parts that need attention.
>> 
>> Velma 82 1.9L AAZ td westy
>> 
>> On Oct 22, 2013 9:54 AM, "mark drillock" <mdrillock@cox.net
>> <mailto:mdrillock@cox.net>> wrote:
>> 
>>    When your foot is OFF the clutch pedal, the input/pilot shaft turns
>>    at the same speed as the crank/flywheel. Thus the bearing in between
>>    them is not being asked to do anything at that time. Since you said
>>    it makes the noise when your foot is off the pedal it shouldn't be
>>    this bearing. You have an internal tranny bearing going out. The 091
>>    tranny can make bearing noises for a long time and still work. On
>>    the other hand it could fail suddenly at any time. I have
>>    experienced both with my AAZ powered vans.
>> 
>>    Mark
>> 
>>