1971 skylark th350- what is this part on the passenger side?

Discussion in 'The "Juice Box"' started by 1971sky, Apr 17, 2021.

  1. 1971sky

    1971sky Member

    Sorry, I have not worked on these transmissions before and would love for someone to tell me what
    this part is on the right side of the transmission? It has a red wire lead on it from above somewhere.

    part on th350 trans.jpg

    Thanks in advance...
    Dennis
     
    1971sky, Apr 17, 2021
    #1
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    There is an emissions device called the Transmission Controlled Spark (TCS). It shuts off vacuum advance in 1st and second gear, then restores it in 3rd gear. That is an oil pressure switch that provides the 3rd gear signal for the TCS. Pay it no mind.
     
    LARRY70GS, Apr 17, 2021
    #2
    1971sky likes this.
  3. 1971sky

    1971sky Member

    Thanks Larry,
    If it leaks can I take it out and plug the hole or use something to stop the leak?
     
    1971sky, Apr 17, 2021
    #3
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Sure just put a 1/8 NPT plug in the hole.
     
    LARRY70GS, Apr 17, 2021
    #4
    1971sky and Buicksky like this.
  5. 1971sky

    1971sky Member

    Thank you sir. I will do just that.
     
    1971sky, Apr 17, 2021
    #5

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