HiRay,
I don't see that anyone has aaddressed your post yet...

in my experience ..it's not the side bearings ..
it's the output flange being loose on the splined shaft it sits on.

in two cases I just tried  another less-worn output flange and that took
care of it.
My recommendation is never touch the side bearings adjustment.
   - maybe if you knew it was in really bad shape there and were just
trying to get a few more miles .
but otherwise..
that's a critical adjustment.  It affects ring gear left-right position
and gear contact patternon the pinion gear, and preload there too.  So
no-touchey ever in my book, unless you are doing a whole set up on the R
& Pand you really know what you are doing.

80 W 90 GL-5 sounds good to me for the final drive section.
I wouldn't use the MT-90there. ..it's a GL-4 for syncronizers .

Scott
www.turbovans.com

On 11/6/2012 7:26 PM, Ray Brubaker wrote:
> Hi,
>
> I'm putting a '89 auto trans Wolfsburg back on the road. I am planning to
> change the drive shaft seals for leakage and noticed that there is a
> noticable amount of side and end play in the out put flange.Is this normal
> or is this from some wear in the diff bearings? I am going to pull the pan
> to change the oil and see inside and can check better if these bearing are
> loose. If there is some looseness but no significant metal in the oil
> should I tighten them up by adjusting both sides equally? Is there
> something else that would cause this looseness?
>
> The Bentley calls for SAE90 oil for the final drive, what is the current
> recommendation to use here? Is an 80W-90 GL-5 good. I have some Redline
> MT-90 that I probably bought around '06, would this be a good choice?
>
> I didn't find anything in the archives on these subjects, but maybe I
> didn't search right.
>
> Thanks for any input,
>
> Ray
>