I think the vast majority of new cars will have atleast some integration between the ECU and the auto. The simple reason being that the throttle position dictates when gear changes occur. TPS is part of the engine, thus there must be atleast some communication between the two.
As to whether this communication is isomorphic (only the ecu for the car will work with the auto) I'd go with what Lurch said and say it depends. New cars are likely to be using a digital signal tot he auto (CPAN?).
Dave
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USA Daily:
2014 Nissan GT-R, very minor modifications for the track
USA Project:
1978 280Z, minor suspension upgrades, VK56DE conversion in progress.
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AUS Race Car:
1973 240Z, L28ET, Autronic, GT35R.
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AUS Project: 1972 1600, 3200km old S15 SR20DET, ground up rebuild.
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