How to ground PDC?

It's a stock efi swap other than fuel pump.
Battery in trunk- #1 ground and pos
Fuel reads steady on regulator when parked
Starts right up and runs well. But as soon as drive it a couple miles it would buck, trans wouldn't shift right, and would die as soon as a stopped.
-removed/cleaned TB
-replaced IAC with OEM
same problem.
-replaced TBS with Dorman
car drove GREAT for 5 miles, then bucking and unhappiness started back!
Almost sounds like no signal from speed sensor. Going from memory here but mine did same thing on my first drive after the 5.9 swap into my Jeep.