Autometer said there have been times where they have seen the speedo more or less "hog" up the signal. When it does this it doesn't leave enough for the PCM and you get goofy shifting.
That appears to be our issue. The speedo head has either fried, or something, but we will use the GPS this weekend and deal with that later.
I can experiment putting a resistor in-line to cut the signal to the gauge - he said this often works.
|