Posted 7/9/2020 07:36 (#8362814 - in reply to #8362444) Subject: RE: IH truck experts
Southern Alberta Canada
Not much information but look at the tailshaft on the transmission, there should be a sensor there with two (or four) wires. It might be failing or one of the wires could be brocken.
The four wire version you can swap the plugs, they were only available with electronic engines.
IH truck experts
