did a bit more searching; looks like the 997 got the aisin, but they kept a getrag in the cayman/boxster - presume getrag couldn't handle the bigger power of the 3.8 in the 911. it is looking like it is a getrag 466 model in both the 986 and the 987 from what i can see, but they look physically different, so getrag must have improved it for the newer cars.
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