1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

1983 Mazda rx7 Automatic Transmission Vacum Modulator PIN

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Old Aug 30, 2025 | 05:05 PM
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1983 Mazda rx7 Automatic Transmission Vacum Modulator PIN

I was changing the Vacuum Modulator on the driver side of the auto transmission and lost the little metal Pin. Unfortunately, a new pin was not provided with the part.
Does anyone know where I can find or automatic guys that have converted to manual have one, I can buy. I feel terrible that can't drive anymore until find replacement.
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Old Aug 31, 2025 | 08:01 AM
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Did it look something like this: https://www.northeastclassicfordpart...valve-pin-new/
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Old Aug 31, 2025 | 12:36 PM
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yes sir, that is exactly what it looked like and the c4 is probably really close to the JATCO 3 speed. I believe will give it a try. Thank you!
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Old Aug 31, 2025 | 12:38 PM
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If i remember, I'll take the modulator off of one of mine and get a measurement. You can probably make a pin from the hardware store work.
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Old Aug 31, 2025 | 01:22 PM
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If you knew the diameter and length you could also buy one from a machine supply shop like McMaster-Carr (https://www.mcmaster.com/products/so...owel-pins-1~~/)
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