i got his code on my T/A it just happen out of no where i was driving the check engine light turn on then when i hit the light and stopped the car would take a whie to take off but when i turn it off it drove normal and then the light turn off but turn back on and then it turn off again.Shoul I replace the 3-2 solenoid or should i start some where else?

 

Would do the 3-2 solenoid first , Could be some other issue bad electrical conection but is definatly electrical in nature and that would be a good starting place.

 

Check this link it starts off with a code p0740, but he also has a p0785.
http://http://ls1.com/forums/showthread.php?t=76922