[urq] 4000Q trans swap

[packley]

We are within two months of completing our swap,
a labor of love and detailing and parts sourcing.

AAN engine, with all the performance upgrades
not to bore anyone or detail here, but we will
be at least 400 HP at first stage.

We have a spare 4000Q trans/rear we were going to install
then we considered greatly increased torque and rpm
range and decided to keep the urq unit. 

How do you ID the difference early vs late 4000Q trans
and it appears the early is better as it has the same
size flanges as the urq?

What benefit will the 20020V trans offer? Perhaps Nathan's
WX trans needs replacement and this uses both engine and trans
from the donor 200.

And I understand the WX trans will start to disintegrate
at some high horsepower/torque application above 400HP, but I understood
that these are quite strong and durable transmissions.

Knowing that a 3B can easily produce 300 HP and 7,000 rpm redline,
the higher numerical final drive is not needed, although it is a great
improvement for MC conversions? The urq has a lower ratio, which would
be
better for street driving.  Plus you will gain almost
1,000 rpm as the 3B is good to 7,000 rpm, and the
old WX gets emphysema at 6,000?

4000Q transmissions are plentiful, and almost a direct bolt-in for the
urq, so I understand that part of the equation, but I am resisting the
swap
at this stage until the WX trans starts to fail.

Then the question will be the ultimate trans/rear...Torsen, quaiffe
etc.  We race an Audi A4 1.8T fwd, and the difference a Quaiffe
diff makes is astonishing! Of course this is fwd race car, which
has limited traction, but this application in awd has to be impressive.

Phil Ackley