Napa has a universal pressure gauge with the right MB fitting. The modulator pressure tap is to the right of the modulator; it is a 12mm bolt. Remove it and attach the gauge. Pull the vacuum hose off the modulator and plug it. You are adjusting the modulator at O vacuum.

USE CAUTION WHEN WORKING ON CARS. BE SAFE



1- Pull the vacuum hose off the modulator and plugs it
2- Raise the rear wheels off the ground
3- Start the car put the lever in D
4- Run the engine up to 31MPH and hold it there
5- Adjust the modulator until it reads 55PSI for your 722.355 transmission
6- Turning the “T ‘handle CW increases the pressure CCW decreases the pressure
7- Install the cap and vacuum hose.