Does a C4 transmission have a vacuum modulator?
The C4 automatic transmission was introduced by Ford in 1964. It is equipped with a vacuum modulator that senses change in the engine’s vacuum due to throttle position and load changes. As these changes occur, the modulator adjusts the shift timing of the transmission according to the demand of the engine.
How many bolts does a C4 transmission pan have?
It has 2 sets of bolts in the bell housing, 7 for the front pump and another 5 to attach the bell housing. The pan fill C4 only comes with the 164 tooth bell, which is specific to the pan fill. It is most often found in 70’s trucks and vans.
What does a vacuum modulator do on a transmission?
Vacuum Modulator is an engine load sensing device that converts engine vacuum into a transmission valve body input.
Where is the vacuum line in a C4 transmission?
I just rebuilt my C4 and I cant seem to find the spot. Vacuum line from intake manifold vacuum to the nipple in the center of you modulator. Originally there was a metal line with a short elbow of vacuum line to connect steel line to modulator.
How does a transmission vacuum modulator work?
A lot of people take gear shifts in their vehicle for granted. But every time your automatic transmission needs to shift into a different gear, there is a vacuum modulator inside which ensures that the gear shift can be successfully completed. How Does a Transmission Vacuum Modulator Work? How Does a Transmission Vacuum Modulator Work?
How to rebuild and modify Ford C4 and C6 automatic transmissions?
This Tech Tip is From the Full Book, HOW TO REBUILD & MODIFY FORD C4 & C6 AUTOMATIC TRANSMISSIONS. For a comprehensive guide on this entire subject you can visit this link: SHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read.
What causes a Ford C4 transmission to malfunction?
Vacuum modulator or rod malfunction. Valve body malfunction. Governor malfunction. Loose tubes on governor distributor. Governor or fluid passage malfunction. Low fluid level. Manual shift valve out of adjustment. Manual shift linkage improper installation and/or adjustment. Vacuum modulator malfunction or failure.