BY JIM BIGLEY
IN TOUCH
I’m the original owner of a 1998 6.5L 3500 truck with 410,000 miles. That’s a lot of experience with this truck, so I can hear or feel everything. Over the years my transmission has been revving out of gear while on the highway. It’s usually fixed by disconnecting both batteries for five minutes to reset the computer controls. If it happens again, I have my batteries tested. A bad battery is usually the cause. Another issue involved my radiator thermostat running my truck too cool. A new thermostat fixed it. Now it drops out of overdrive randomly and then goes back in. My batteries are good—I’ve done the disconnect trick. My thermostat has me running at a good temp. I know it’s got 410k miles, but could it be the transmission module? I’m open to any suggestions. Thanks, John Williamson