OK, so, I went through several pages on this truck forum and only found one question regarding the OD transmissions but didn't really apply to my question.

The truck is a 93 D350, Cummins, 2WD with an OD trans. When the OD doesn't work, is it alright to wire the switch to stay activated ??? I've driven the truck with the switch wired/bypassed and it seems to be alright that way ??? Before we wired it direct to stay on ... the trans would buck & kick like it couldn't see the signal to go in overdrive ?? I've occasionally seen posts regarding the OD on this era of truck but never paid any attention to the details because I've mostly had stick trucks ...

Thx in advance ...