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- 70-73 Firebird & TA TECH (https://forums.maxperformanceinc.com/forums/forumdisplay.php?f=437)

- - TH350 speedometer drive with wire (https://forums.maxperformanceinc.com/forums/showthread.php?t=829357)

goatman55

05-03-2019 11:31 PM

TH350 speedometer drive with wire

2 Attachment(s)

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

necdb3

05-04-2019 07:09 AM

TCS (transmission controlled spark) uses the sensor to allow vac advance above 38MPH.

goatman55

05-04-2019 02:45 PM

Thanks

Aus78Formula

05-06-2019 04:10 AM

Nearly couldn't tell it was a transmission under that!

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