How-To Install '70 Door Glass In A '69 Mustang

We used a diagram from a Ford shop manual that showed an exploded view of the '69 and '70 door assemblies. We noted the different shapes of the lower edges of the glass.

The regulator is the first piece to be installed in the door. It's carefully placed in the door and left sitting at the bottom while the plates are attached to the glass.

Place the glass into the door through the slot at the top of the door.

The plates are the next components to be installed into the door.

Assembly of the glass and plates is easier with two people. Have one person hold the glass in place while another attaches the plates to the glass. Here, the rear plate is tightened to the glass, while the front plate has already been installed. Once the plates are attached to the glass, place them over the tube-shape tracks inside the door and locate the glass.

Next, reach down in the door to retrieve the regulator and reinstall it into the door using the five original bolts.

Using nuts sized to fit the track studs in the '70 plates, secure the track to the plate. First be sure the wheel on the regulator arm is in place on the track. If you find '70 plates with tracks already in place, you probably won't have to worry about this. But since we used the modified '69 tracks (see step 13), we had to keep it in mind.

Attach the short rear arm of the regulator to the door using the original bolt. Be sure to attach the long front arm of the regulator to the front plate, again using the original bolt as shown in step 6.

With everything in place, test the travel of the glass going up and down after temporarily installing the window crank. One of the arms on the new regulator got caught on the regulator spring, so we adjusted the glass out slightly at the bottom of the door by loosening the bolts underneath the door that hold the tracks in place. Once adjusted and the bolts tightened, the window rolled up and down perfectly.

The chrome weatherstrip ends on each piece of '69 glass were taken off and reinstalled on the new glass. Basically a press-fit, the ends should fit into place on the '70 glass exactly as they did on the '69 glass. Once you're satisfied with how the windows roll up and down, reinstall the door panel to complete the installation.