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TCI Replacement Vacuum Switch From TCI Kit #890-376600


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Replacement Vacuum Switch From TCI Kit #890-376600
Replacement Vacuum Switch
  • From TCI Kit #890-376600
  • Estimated to ship direct from manufacturer on 04/02/24 , pending manufacturer availability. Learn More

    Thank you! We will notify you when this product becomes available.

    CMP3766B is rated 4.0 out of 5 by 3.
    Rated 5 out of 5 by from Works Great I installed a 700R4 w/lockup in my '70 C-10. Apparently, the engine vacuum needed to operate the lockup properly was too low. The converter would lock and unlock at every little incline, which was very annoying. I installed this switch and problem solved. If the transmission is "busy", turn the tiny allen screw located in the center of the switch a small amount counter clockwise to decrease the amount of vacuum required to activate the switch. Likewise, turn it clockwise to raise the vacuum required. It doesn't take much adjustment to make a big difference. I was lucky, I got it right with the first adjustment. The truck is much more pleasant to drive now. Well worth the price of this product!
    Date published: 2020-02-06
    Rated 2 out of 5 by from Hard to adjust Very tiny adjustment screw and sensitive. Should be sold with a vacuum delay valve so it can do the job it is intended to
    Date published: 2014-11-02
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