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Discussion Starter · #1 ·
Can anyone tell me what this device is and why it is inbetween the speedometer cable and the housing of the sm-465 4 spd manual transmission on my truck? The cable will screw directly to the transmission so this must have some purpose. It also says "made in usa" on it so it might be illegal...
It is made by by stewart warner. I've run the truck without it today and I can tell the speedometer is off some without it.
 

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Discussion Starter · #4 ·
speedo cable part

There are 4 screws holding this thing together. I assume it's just some gears inside. Can it be taken apart, cleaned and relubed without messing it up somehow?
 

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You can take them apart. Just go slow so both gears stay on one side. Some of those allow you to change the gears inside for different ratios. Some don't.
And not to be rude but you'd definetly want to take it apart to see what makes it tick. You'll never understand how it works if you don't take it apart. JMHO
 
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