AOB and ADZ - is there a difference?

[C1J1Miller at aol.com]

Hi Rob,
I think Keith is wrong; the '91 200q20v used a 4.11:1 tranny.  The AOB tranny 
you're talking about, however, is also a 4.11:1 tranny, I believe.
Looking at ETKA, they both use the same rear diff, AAT 
017 500 040D or
017 500 044J
Looks like it would work fine; not sure if the gears are different, or if the 
'91 200q20v gears were reinforced for the higher power output. 
HTH, Chris Miller, Windham NH, c1j1miller at aol.com
http://members.aol.com/c1j1miller/

Hello Again:

Those ADZs are gone, but I can get 36 units of AOB. According to my
version of FA, these 2 trannies are identical except for the rear tail
housing. We compared them both and only see one hole in the ADZ (used
for a timing light) that is not there on the AOB. FA shows the
bellhousing as having the same number. We couldn't see any difference in
the tail housings at all.

Keith at Anderson Motorsport told me that the ADZ has a final drive
ratio of 3.89 and that FA is wrong. I believe that the AOB can be used
instead of the ADZ, since there are probably a lot of people wanting one
of those new, but old stock ADZ. If the AOB works, I can get 36 of them
for less than $900 each...

Kind Regards

Rob