moonlight machine
Diamond
- Joined
- Nov 19, 2007
- Location
- marysville ohio
About 10 or 12 years ago I swapped the Turbo 400 3 speed automatic transmission in my dualy for a 4L80 E 4 speed overdrive transmission with a stand alone aftermarket computer to control it. Totally trouble free for many years it started acting up about 2 years ago. It sticks in low gear once every 2 months or so. Sometimes cold, other times after driving 100 miles. It stays in low for 1-3 miles or so then starts shifting fine again. So far I have changed the fluid and filter, the shift solenoids, and the shift computer. The thing does not stay broken so it's not easy to sort out. Ideas anyone?