Okay...I got this 1993 700r4 in my 1981 C10. I hooked up everything right. I am using a TBI TV cable instead of a carb TV cable. I am also using a vacuum switch from a 1985 Suburban and it's wired up correctly. First and second are fine...Shift into third and it just revs up barely moving. WTF? This is SAME SHIT that the T400 did! I shift it back into second and it goes fine. I don't have the speedometer hooked up yet. Do I need to go get the carb TV cable?