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
>
>