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Old 05-03-2019, 11:31 PM
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goatman55 goatman55 is offline
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Default TH350 speedometer drive with wire
I just pulled the dead TH350 out of my 72 Firebird and found a wire coming out of the speedometer drive housing. I’ve never seen this before, what is it for?

Thanks,
Dave
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Old 05-04-2019, 07:09 AM
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necdb3 necdb3 is offline
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TCS (transmission controlled spark) uses the sensor to allow vac advance above 38MPH.

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Old 05-04-2019, 02:45 PM
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Thanks

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Old 05-06-2019, 04:10 AM
Aus78Formula Aus78Formula is offline
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Nearly couldn't tell it was a transmission under that!

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