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,

 

If you've messed about with the transmission, a likely thing would be
the crankshaft position trigger. Make sure its solidly connected, and
that the gap between it and the tonewheel is correct.

Any fault codes? I'm betting you see a crankshaft position sensor error.