I have a 1995 powerstroke 7.3.
One morning I noticed my speedo on dash was bouncing all over the place and then my OD lite came on and then I lost everything, no speedo and tranny wouldnt shift right.
So I stopped for a minute and started to go slowly to just try and get it home when my odometer came back and speedo started to work again but it still bounced.
I read about the VSS ontop of the rear diff and I replaced it.
My speedo would work but when it got over 45-50 mph and higher, it would bounce again, but my abs light and OD light do not come on.
I looked at the wire harness going to and away from the VSS to make sure wiring was ok and didnt see anything wrong, so I looked at the ground wires up front near the battery and radiator and all is good.
So I let it sit for awhile until I had more time to look at it, it is my wifes truck by the way.
Now that Iam driving it for now, I noticed the speedo will bounce all the time again.
Removed the VSS and made sure it was clean and it is, I stuck my finget in the hole to feel the ring gear and feel nothing wrong, like a broken tooth or something.
When I turn the ign. key on the abs light comes on for a second and goes off like it should and when Im driving it, the abs light doesnt come on nor my OD light, but the tranny shifts irractically at times.
I went back to the auto parts store to see if there is another sensor I may be over looking and they sold me a sensor that is thier book,
but I cannot find it anywheres on the tranny or transfer case, so I think it is a wrong part.
Any ideas ??
Could it still be a VSS even tho I replaced ??