2001 Volvo VN660 Road Speed problem

I have a 20001 Volvo D12C 465/ 10 speed eaton autoshift. While driving down the road ill have the speedometer start jumping up and down and the engine starts to cut in & out intermittently every few seconds while giving it gas, if i let it idle down the road nothing happens. Also the cruise control stops working and the transmission has preoblems shifting gears up, gearing down its fine. Had codes for Accelerator Pedal Position % and speed sensor on the transmission. I replaced the accelerator pedal and the speed sensor on the transmission. The truck was fine for a few weeks, no codes or any issues. Then all those symptoms came back, but no codes were showing up. Found out i didn't have the correct EECU on the engine. I got the proper EECU and got it programmed for my truck at a VOLVO dealer. Picked the truck up from the dealer and everything was working great. I drove the truck about 350KM and the truck started acting up again. The truck started showing me codes and a "Check Cab Controller at next stop" Message.
The Codes:
Cab Controller
SAE J1708 DATA LINK
MID 144
SID 250
FMI 5

Cab Controller
Road Speed
Electrical Fault
MID 144
PID 084
FMI 5

Engine
Road Speed
Unknown Fault
MID 128
PID 084
FMI 11

Engine
Road Speed
Communication Error
MID 128
PID 084
FMI 9


I ended up changing the Cab Controller(VECU) thinking it was over heating and shorting out, because every time i would let the truck sit for more than 8 hours it would be fine for about 20min of driving till everything came back.
Over a year ago, M&K Vovlo/Mack in Kalamazoo,Mi replaced the EECU and the engine harness, because the oil pressure sensor sent oil through the electrical lines and fried my original EECU. They ended up putting in a used/working but not responsive EECU onto my truck. Now this issue came up and i took it to my local Volvo dealer to get it checked. Plugging into the diagnostic port on the truck it was not allowing them to access the truck at all. So i took the truck back to my shop, pulled the EECU off the engine and tried comparing part numbers to the 5 i was given by the dealer, ended up it was for a d12B with a standard transmission. I tracked down one of the new super seeded part numbers for the EECU and had them program it. Once programmed the truck was running like a new truck, until a little driving the truck started acting up and i had the "Check Cab Controller at next stop" and the codes above came on as active. Usually with an active short somewhere i shows a value of how many times the codes is shorting in and out. But these codes just say active with no actual value.

As of right now; I pulled the doghouse off, dropped the drive shaft, check all my connections on the main transmission harness, pulled the harness off the transmission that has all the power and data link lines, removed the cover on the engine harness housing where the data link lines run too. Now I am starting to remove all the electrical tape, plastic protectors on all the cables and hopefully ill find a break in the lines somewhere*(found rubbed through lines, replaced the broken lines) I also ordered the Main transmission harness and will have tomorrow morning(replaced) I've replace the both cables that go from the VSS (vehicle speed sensor) to the cab controller. I've also replaced a bunch of ground cables and other broken power lines(none have anything to do with the issues). New ground cables for the engine, alternator and starter. After doing all this i started the truck and all the symptoms are still there. The code "SAE J1708 DATA LINK" was the only code that disappeared everything else was still there. I put the truck back into the shop and messed around with some more cables. Now my speedometer shows no speed, and the truck is not cutting in and out. All the codes are still there and the transmission does not want to shift, and cruise does not work.

If someone had the time to read this, PLEASE HELP!
Thanks.