98 dodge 2500 dies

i reacently rebuilt the trans in a 1998 dodge v10 shortly after it came back, symptoms where driving along after maybe 5 miles it would cut out like a diesel whith water in it, real agressive cut outs of the engine . when it died it would flash the service engine soon light . hooked the modes to it had no codes , decided it must be shorting out the com puter so i monitored all the 5 volt refrences,test drove it when it died out so did the scanner any ideas much appreciated,