MENU Subscribe to a Magazine
  • Sign in
  • Join

Subscribe to Print or Digital! Save up to 83%

  • Print Subscriptions
  • Digital Subscriptions
  • Gift Subscriptions
  • Subscriber Services
  • Back Issues
  • Personalized Cover
Muscle Mustangs & Fast Fords Magazine Muscle Mustangs & Fast Fords SUBSCRIBE
Mustang Monthly Magazine Mustang Monthly SUBSCRIBE
  • Sign in
  • Join
    •

Mufp 0605 29 Z Small Block Ford Transmission Performance Vacuum Moulator

Back to Article View Gallery
Share this photo
Back to Article
Mufp 0605 29 Z Small Block Ford Transmission Performance Vacuum Moulator
29 of 35
This is the vacuum modulator that controls upshift firmness and timing. Adjusting the modulator clockwise firms and delays the upshift, while counterclockwise speeds up and softens the upshifts. Make your adjustments one turn at a time, then take a spin to evaluate the upshifts. Do not adjust the vacuum modulator any more than four turns in either direction. C4s came with two types of vacuum modulators. Early versions had a screw-in type; later models have a push-in modulator with a clamp as shown. Weak intake-manifold vacuum caused by a hot cam or torn vacuum hose will adversely affect upshifts.

More Photo Galleries

Connect With Us

Stay informed with our Newsletter Sign Up Now

Related Articles

Girls

View More Girls

News

See All News

Sponsored links

Subscribe to a Magazine

© 2015 Mustang 360 Network
TEN: The Enthusiast Network.
All rights reserved.

Company
Sections
Brands
Generations: