Okay. Can I dig a little deeper into what you mean by it has been the same "since you hooked it up"? Does that mean that you recently bought this car or whenever you got the car the speedometer was not hooked up and as soon as you hooked it up, this is what it was doing?
If that is the case, then it is safe to assume this is why it was unhooked. Which means we may be dealing with something the previous owner messed up.
I am trying to find it but there should be a driven gear that attaches to the sensor where I circled.
I am not finding the gear options but there are normally other sizes for when you change the wheel or gearing size then you can adjust the speedometer gear so that it is accurate.
This would all make sense as to what you are seeing because if that gear is wrong then the speedometer climbs too fast.
Can you remove the sensor again and see if there is a removable gear inside the unit? This is what I am not finding in the manual so we are going to have to just see if we can figure this out. As this is the way most all other vehicles of this era operated.
Tuesday, December 1st, 2020 AT 2:41 PM