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Is an Engine Speed sensor necessary? Answer in post 56.
I have an issue with my 1997 1078 that I can't figure out. About a month ago, I started on a drive in the 1078 and the transmission stayed in 2nd gear before I went 15 feet with the 7 disappearing from the left side of the shift pad. I couldn't shift to neutral or reverse after stopping, it just stayed in 2nd. After doing some research and reading the codes, 25-11, I determined that the Engine or Output speed sensor was bad. Sure enough, the end was ground off of it. So I ordered the generic NAPA unit pn NHD 6569002and it seemed to work fine. I have it about a 1/3rd of a turn off of the flywheel. But after driving it a couple of times, it did the same thing again. Readjusted a bit and it's working again.
Which leads me to this question. A few years ago I owned a 1079 that I noticed had the sensor wires cut and not hooked up. I never had an issue with the truck and at the time, didn't even know what it was. So I taped the bare wires and let it go. Coffey1 just disconnected his on his 1088 and the only issue was the tach not working; it ran and shifted fine. Which leads me to believe that there has to be a way to bypass this thing. Anybody have any input?
I have an issue with my 1997 1078 that I can't figure out. About a month ago, I started on a drive in the 1078 and the transmission stayed in 2nd gear before I went 15 feet with the 7 disappearing from the left side of the shift pad. I couldn't shift to neutral or reverse after stopping, it just stayed in 2nd. After doing some research and reading the codes, 25-11, I determined that the Engine or Output speed sensor was bad. Sure enough, the end was ground off of it. So I ordered the generic NAPA unit pn NHD 6569002and it seemed to work fine. I have it about a 1/3rd of a turn off of the flywheel. But after driving it a couple of times, it did the same thing again. Readjusted a bit and it's working again.
Which leads me to this question. A few years ago I owned a 1079 that I noticed had the sensor wires cut and not hooked up. I never had an issue with the truck and at the time, didn't even know what it was. So I taped the bare wires and let it go. Coffey1 just disconnected his on his 1088 and the only issue was the tach not working; it ran and shifted fine. Which leads me to believe that there has to be a way to bypass this thing. Anybody have any input?
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