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It is a common fault with the EA, EB and ED falcons as well as some Holden Commodore and Nissan models which share the same speedo components. The problem usually occurs when they get to about 200,000kms. What the problem is there is a very small cog inside your speedo which drives the odometer mechanism. This cog loks like something you would find in a toy. What you will find has happened is one of the teeth has broken off it and it can no longer drive the odometer. Because it is a common problem the part to fix it is available just ring around or try ebay. To fix the problem yourself pull out the instrument cluster then undo the screws that hold the front panel (4 fairly short ones on the side and 4 very long ones on the back), remove front panel. Then undo the four centre screws which hold in the speedo. Once you pull it out remove the trip meter plunger and then the needle by turning it carefully in a counter clockwise direcvtion several times until it comes out. Then remove the screws that hold on the faceplate and remove same. The whole assembly will come away. Then undo the two screws that hold on the circuit board and when that comes away you will see the small cog. You will be suprised how small it is. If you have your part then replace it and screw it all back together. When you replace the needle turn it in a clockwise direction and be sure to set the needle on zero.

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Q: Why does your speedo still work on your ea falcon but not the odometer?
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