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How to test speedometer hall effect signal sender for 8k or 16k ppm?

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  • How to test speedometer hall effect signal sender for 8k or 16k ppm?

    Hey guys. The girlfriends 34 has a 700r4 trans with an electronic gauge set. The speedometer has been screwy, only going up to about 45 mph and then the needle varies about 5 mph. It is a Haneline gauge, which they quit making about 10 years ago. So before I buy new gauges I was going to test the sender. I was pulling it off the transmission and it got fluid on the part number sticker and the part number wiped off. Is there any way to test the unit to see if it is an 8k or 16k sender? I spun the rear tire one rotation with a voltmeter hooked up and it cycled voltage 12 times.
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