Ultrashift to Manual

Good for You! Another truck improved!!
I work with a guy who's family has has a trucking business, they converted a ProStar to manual. It cost about $1700.00 for the whole job, only needed to fabricate 1 bracket, everything else they got from a boneyard. He claimed on that truck no changes were done to the computor, it runs and shifts just fine.
My only guess on the code issue, it could be a wiring, or a socket/plug. Or just coinsidence(sp)

 

The tranny they kept, just took off the shift box, installed the shift tower, hung the linkage and clutch pedal.

 

@Norisservics, J1939 is the communication protocol that the engine computer uses to communicate with the transmission, ABS and dash computers. These parts are networked together and exchange information. For example, the transmission computer will send the speed to the dash and to the engine computers. The manual won't have a computer so you'll need to get your engine computer reprogrammed for a manual transmission but you said that was already done. I suspect that your computer wasn't reprogrammed properly.

 

So you removed the computer..... The 1939 circuit should tie all the computers together with a daisy chain and 120ohm resister (terminator) at each end. If you only unplugged the tranny computer then you broke the daisy chain and the rest of the computers are looking for the other terminator. You will need to make sure they tied both j1939 (in and out if you will) in the tranny computer plug back together so that the remaining computers can see both terminators

 

There should be two sets of 1939 wires in the trans comp plug, they are usually the standard yellow and green. You should be able to jump them together and complete the daisy chain.