Automatic Transmission Vacuum Modulator
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Pro-King Automatic Transmission Vacuum Modulator

Part No. MD-20 Warranty Details  

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Fully adjustable vacuum modulator to maintain accurate shift points.
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O.E.M. Replacement:Yes
Transmission Manufacturer:Ford
Transmission Model:C4; C5


by PowerReviews
Pro-KingAutomatic Transmission Vacuum Modulator

(based on 1 review)

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Reviewed by 1 customer

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(5 of 8 customers found this review helpful)


works good rite out of the box


  • Easy replacement
  • Easy To Use


  • Needs adjustment info inc

Best Uses

  • Trucks

Comments about Pro-King Automatic Transmission Vacuum Modulator:

works ok rite out of the box , but could use adjustment info included in box

  • Car & Truck:
  • Auto Enthusiast, Backyard Mechanic, Competitive Driver, Truck Enthusiast

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1 Question | 2 Answers
Displaying question 1
  • Q:

    is this hard to adjust. this is the first time i have put in one and i am not a mechanic .,so do i need to take it to one or , is this something i can do myself
    Asked on 7/27/2010 by baba from mocksville nc

    2 answers



      For step by step instructions i recommend that you go to your nearest Advance Auto Parts store and purchase a repair manual.

      Answered on 7/27/2010 by Kevin from AAP
    • A:

      It Adjust where you plug in the vacuum line. Thin screw driver will do it!. I never adjusted one before today and it was easy to adjust...

      Answered on 12/5/2013 by Jasper Sandy from Bunn, NC
Displaying question 1

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