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TCI Replacement Vacuum Switch From TCI Kit #890-376600

890-CMP3766B

made in usa

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TCI CMP3766B
$28.99
4 left in stock
Replacement Vacuum Switch
  • From TCI Kit #890-376600
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    Save $10 off $299, $20 off $599, $30 off $799, $100 off $1,599 Orders. Promo Code: SUMMERFUN exclusions apply
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    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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    Some parts are not legal for use in California or other states with similar laws / regulations

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