Transaxle info

["Dave M." <doc1590@domain.elided>]

I've read a couple posts on this so I thought I'd
throw this out there.  If you want to disagree with
this, please do so, but don't flame me, I got this
from ARDONA, specifically from Russ Ruland through
David Rogers, former Field Service Manager.  It starts
with the 1981 GTV6 through the '88 Verde. NO, I don't
have the actual gear ratios but I love my transaxle
which is basically, Platinum internals with it's
taller bottom three gears and the LSD, but built on my
stock 84 housing.  That way I didn't have the hassle
of changing linkage and speedo drive.

- ---------------------------------------------------
1981 GTV6 uses the same box as the 84 and 85 with the
4.10 final but has a unique third and fourth gear
ratio. (?)

The 1982 to 1985 boxes all have the same transmission
ratios but the 82 and 83 models use a 3.416 final
drive (12/41) and the 84 and 85 models have the 4.10
final (10/41).  In mid 1985 starting with Serial
number T.00006731, the isostatic shift linkage was
used.  That's the one with the roll pin instead of the
spline at the gearbox.

The 1986-1988 models with 2.5 liter engines use a 4.10
final with a taller 1st., 2nd. and 3rd. gear than the
82 to 85 models.  All units use the isostatic shift
and have the inductive speedometer pickup.  Most, but
not all, of the Q.P. models were LSD.

1987-1988 3-liter cars, had the same gear ratios as
the 86-88, 2.5-liter cars, except the 3-Liter all had
a 3.54 (11/39) final and LSD.

1988 cars with Automatic transmission used a 3.154
final and Q.P. models had LSD.
- ----------------------------------------------------

There you have it!  I was told by Russ Ruland, who did
all their warranty rebuilds, that he did see some
Platinum models without LSD so if you are looking for
a used box... don't assume.  I don't remember if you
can tell from the outside and off hand I can't think
of a way to tell without removing the left stub axle
and peeking into the chunk to see if the spider gear
cross pins are tapered or not.  Now that I think of
it, I don't remember which is which.  I think tapered
is LSD but I was wrong ONCE before.  
I just bought my LSD unit as well as the bottom three
gears and layshaft from APE and I've been driving
happily for two or more years.  We re-shimmed my LSD
for more lock up and it's a blast, especially in the
rain.  My only regret is not lightening gears.  

The LSD units will work with any final ratios and you
can install any final drive in any year.  Changing
actual transmission ratios could be tricky but can be
done also.  There are some internal differences in
these boxes, bearing design and retention, shift fork
bolts etc., but most are interchangable.
NO, I do not have this info on the Alfetta.  I know
most of the ratios are completely different.  Rick
Lovecchio, (R.M.L.) from Daytona, races an Alfetta and
tried a V6 Plat box, but the four cyl. wouldn't pull
fifth, so the actual trans. ratios must be much lower
in the Alfetta.

Cheers!
Dave Miller
Deltona, Florida
  



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End of alfa-digest V7 #1139
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