[T3] Noisy Tranny

[Jim Adney]

On 27 Sep 2023 at 14:00, Keith Park wrote:

> If you heard it, youd say bearing too, it has that "sound".  It makes
> noise Sitting there with the clutch engaged in neutral, only the input
> shaft is turning at that point so that rules out a lot.

You're certainly right, that making noise in N with the clutch engaged 
eliminates a number of possibilities, including some bearings. But it still 
leaves some possibilities, including bearings.

In N, two of your gearsets are slipping on their input shaftbearings, while the 
other two are spinning the counterparts on the countershaft. Okay, so this 
leaves out the R/P mesh, but not necessarily the pinion bearing seating (has 
it come loose in the case, allowing its shaft to move forward a bit.)

I'm thinking of the fact that if either shaft has managed to change position 
axially, that leaves a lot of things mis-aligned, including bearings, each of 
which could cause whining.

BTW, one of the only trannys I have ever fixed, had a broken pinion bearing. 
In order to get that car back on the road I did a tranny swap, but much later I 
tried to fix that one. The replacement bearing cost me, after my discount 
from VW, over $80, and that was probably over 30 years ago. Those parts 
are not cheap! And to install that bearing I had to spend a few days with a 
mill and some big chunks of steel making the tools I needed just to take the 
pinion shaft apart. I've got those tools now, if you need them.

In the end the repaired tranny was excellent, but that was because I didn't 
change anything that would have required reshimming.


-- 
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************