Speedometer not workin correctly, My speedometer measures like 20 mph faster than I'm driving Options

[celicabob]

Hey everyone. Im basically a newb when it comes to cars and I am hoping someone can help me out. I've got a 94 Gt auto and I think that the trannie may have been replaced,but I'm not sure. Anyways my speedometer is way off. I will be doing like 45 and it says I'm going 90 also some days it seems to be off by only about 10 or so mph. It seems to be more inaccurate on rainy days, but even on dry days it is slightly off. Can ayone tell me what is wrong and how it can be fixed. Any help will be appreciated.

[celicabob]

Yeah, it is really weird how it is off different on different days, but it deffinately is. Actually I have a stock gauge face and cluster, but the car is used so maybe it was messed with. Is it difficult to swap a new gauge cluster in?

This post has been edited by celicabob: Nov 30, 2008 - 12:24 AM

[garin]

first time yes. but like any thing it become easier the more you do it. my car is apart like every other week. are your other gauges working fine?... tach, gas, temp. if they are you most likely have a cluster issue, not an electrical issue. i think it is the cluster though. figure out how to get it out and look at it. snap the black piece off that goes around the ignition. after that there are four screws holding that cover on. the cluster it self is held in with four screws, there are three plugs in the back. gl.