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UPDATE: Both shift solenoids display required resistance 19 - 24 ohms (reading at 21,8 ohms). So we did one tricky thing. We clipped onto a wire (Engine side end) from 1-2 solenoid (light green) + 2-3 solenoid (yel/blk) + TCC solenoid (tan) + ground connection to manually command a shift. We made something like a switch board to which our wire clips were attached and took it for test drive. In "D" - solenoid A ON solenoid B OFF in first gear, in second gear A - OFF, B OFF, in third gear A OFF - B ON, in fourth gear A ON - B ON. Commanding through those switches did not change a thing so basically car was still in second with no change in rpms like of you had stick shift and changed your gear/speed by depressing clutch and upshifted by hand manually. So it is not electrical issue- shift solenoids or TCC.
Does someone have a color diagram that would show how fluid travels within transmission when "D" is selected? There might be some kind of miniature blockage in valve body or something. Thanks
heres a vid. Hopefully the site will allow it. Otherwise just copy and paste the link.
That sounds like a bad battery or bad connection someplace. Can you observe the voltmeter when you crank it? It is possible you will see it drop to like 8 volts. A jump would not help in that instance as the battery creates a huge draw.
Crank it with a voltmeter connected