^^ Not to mention that hindsight has blessed us with the knowledge that the original VW valve body design was flawed.
We know that two passages in the original valve body are too small. We are referring to two small holes that are in the back-plate. When doing a rebuild, the new procedure is those two are drilled out to a slightly larger diameter. This lets more fluid flow thru, which takes the excess back-pressure off of the valves.
One (or was it two) of the solenoids are also replaced with a heavy duty version that was not present in the original design.
Also the original 2003-2004 designs had a soft brass insert that is now replaced with steel. The brass made a softer shift, but it was too soft. It deformed and wore away, leaving us with a more harsh shift.
Anyways, this is all documented somewhere on the board. I was going off of memory here, but I think I got most of the facts correct.
I think that Sonnax has most of this information on their site.
