I believe you but, my 91 has the standard mechanical speedo which unlike the newer 93? and up which have the electronic pick up at the rear trany output shaft. If my speedo has a bit of bind up (where the speedometer wobles at low speeds) do you guys think that could be the problem for this code?
I also have a lot of kilometers on this truck; now just reaching ~600,000km. The drive shaft has recently gotten some vibration in it and that is very likely from the hanger bearing. Rubber dampner pops out of the holder and has to be stuffed back in and then it's quiet. Is this code just from pushing it or something else? Thanks again!