What does a vacuum modulator do on a C6 transmission?

What does a vacuum modulator do on a C6 transmission?

The vacuum modulator is a vital component of automatic transmissions. It tells the transmission what kind of load is being put on it, allowing the transmission to react with the proper line pressures and shift points. Over time, modulators can develop leaks, suffer ruptured diaphragms, become bent, etc.

Why does my truck shift into reverse so hard?

Transmission Fluid Low or Poor Condition – Vehicles low on transmission fluid or that are operating with worn out or contaminated fluid are likely to experience hard shift conditions. Lack of adequate lubrication within the transmission can cause several problems, including hard shifting.

How do you adjust the bands on a Ford C6 transmission?

Adjusting the bands is a straight forward process. Just get the car safely up on jacks. Locate the intermediate band adjustment (the front one), loosen the locknut, torque down the adjustment screw to 10 ft lbs and then loosen it exactly 1 1/2 turns. Tighten locknut.

How does a c6 transmission shift?

The transmission will shift through the gears, but will not downshift back to low gear when coming to a stop. There is a delayed transmission engagement or it will not engage forward or in reverse. • The transmission slips in forward and reverse and a whining noise comes from the front pump or torque converter area.

How much fluid does a Ford C6 transmission hold?

Transmission Fluid Capacity
Transmission (w/ Stock Pan) # of Quarts
Ford C4 5.5
Ford C6 7
Ford AOD/AODE 6.5

What kind of transmission does a Ford F-350 have?

Tough, hardworking Ford F-350 trucks are built to power through any job. Part of that is in its transmission, and keeping yours in shape is key to keeping your truck on the job. When you notice gears slipping instead of shifting smoothly, Ford F-350 automatic transmission parts from AutoZone give you what you need to get things back in gear.

How to build a Ford C6 Select Shift transmission?

Step-1: Inspect Throttle Valve. The throttle valve, which is actuated by the vacuumoperated throttle valve assembly (vacuum modulator). Check for a clean fit and lubricate with transmission fluid before installation. Step-2: Install Throttle Valve. Next install the throttle valve assembly and pin.

When do you notice gears slipping on a Ford F350?

When you notice gears slipping instead of shifting smoothly, Ford F-350 automatic transmission parts from AutoZone give you what you need to get things back in gear. Slipping gears aren’t the only sign that you need F350 automatic transmission repair.

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.