Speedo reading high

[GT300]

So my speedo is reading at like 70 at idle, and then seems to increase normally (as in reading 100 at 30mph). I don't think its needle position because its started at like 65 one time and another time it stayed around 50 no matter what speed I was going. Does anybody know what this could be?

Background: I just had my starter replaced and it happened right after that. I'm going to bring it back for them to fix it but if it turns out to be a simple fix I'll just do it myself. Thanks in advance

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[bradleyem]

It has nothing to do with the starter replacement.

The stepper motors in your guage cluster are going bad. They start off by sticking when its really cold out. Sometimes they are fine when they warm up, but sometimes they will still have problems. My voltage gauge is stuck pegged out all the time. My spedometer still works except when its cold out. It is still anywhere between 3 and 10 MPH off depending on how fast I'm going though. You can buy a full set of replacement stepper motors here:

http://www.amazon.com/Mustang-Stepper-Instrument-Speedometer-Dashboard/dp/B004WBAD0U

and here is a video on how to replace them:

http://www.youtube.com/watch?v=EgqAoQFCu0A

 

[ummduh]

And you may as well replace all of them at the same time. I just did this a few months ago. Not too difficult.

 

[GT300]

Alright thanks for the advice, I'll most likely go with that. The guy at the garage recommended just putting the needle back at 0, because the gauge stays at 70 even when off. But if I'm taking the gauge cluster out, I might as well replace the motors.

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