Yes, it is obvious that the end of the axle shaft was hammering on the
flange plug. Warn CV joints can allow the axle to move than normal and
if the balls roll across wear spots in the joint tracks this can make
the axle jump side to side. Could cause rub marks on the axles from the
boots too.....

There is always tranny oil at the back of the blue cap, that is why
there is a blue cap.

Part 19 is an o-ring around the diff adjuster that seals the diff
adjuster against the tranny case that the diff adjuster threads into.

Mark

Neil N wrote:
> Hi all.
>
> For an '88 Westy. Both blue "cap" seals at ID of each transmission drive
> flange were leaking badly. One outright failed, the other was either
> poorly installed or was pushed part way out due a possible clog
> at transmission vent hole. Images of failed seals
>
> http://tinyurl.com/ztkcwzc   I'm not sure what caused one seal to outright fail
> but I have to wonder if the driveshaft was rubbing against it.
>
> I see info in archives, and this detail may well be buried in there
> somewhere but
> looking at this image (ETKA type)
>
> http://tinyurl.com/zhwwjrs
>
> if seal 20 in image is failing, will it allow gear oil to get in
> behind the blue "cap" seal at
> ID of drive flange?
>
> What does part 19 in image seal?
>
> Thanks,
>
> Neil.