Mustang Window Regulator (1970) Installation Instructions

Tools Required:
  • Ratchet
  • 3/8 inch Socket
  • Phillips Head Screw Driver
  • Flat Blade Screw Driver
  • Door Panel Removal Tool
  • Clamps
Install Difficulty:
  • Moderate
  • Moderate Project
1. To start installing your new Mustang Window Regulator, remove the door panel. Start by putting the window down. Remove the door lock knob, mirror control bezel, regulator handle and the Phillips head screws along the bottom of the door panel. If you have speakers in the door, you have to remove the speaker grille. I removed the speaker, too. You can get through the hole to lube the bottom end of the front window run. There are four door panel clips: two on the front edge and two on the rear edge of the door panel that have to be popped from the door. If you don’t have the removal tool, you can use a large flat tipped screw driver.
Mustang Window Regulator Install Image
2. Pull the bottom of the Mustang door panel out towards you and lift over the door lock rod and the upper edge of the door. Push the mirror control knob through the panel and unplug the courtesy light. If your door has the watershield, remove it. It is usually held in place by strip calking, which makes it hard to remove them without tearing them. I had a new watershield, so I wasn’t worried about tearing the old one.
3. If your Outer Beltline Weatherstrip needs replacing, now is the time to do it. You can move the top of the window in towards the interior with the door panel removed.
4. You do not have to remove the Mustang window glass to change the regulator. Put the window in the full up position. Clamp the front and rear of the window with the clamps resting on the top of the door. You may want to put a rag on the top of your door for protection. I used small blocks of wood. I used clamps with rubber pads on the clamping surface to protect the window. If you have regular C-Clamps make sure you put some kind of cushion between them and the glass. Rubber would be best.
Mustang Window Regulator Install Image
Mustang Window Regulator Install Image
5. Here are the Window Regulator attaching points.
Mustang Window Regulator Install Image
6. Loosen the Window Regulator mounting bolts as far as you can without removing them.
Mustang Window Regulator Install Image
7. Remove the following Mustang Window Components: The Fore-Aft Adjustment Nut, Fore-Aft Tilt Bolt (mark the location of this bolt on the door) and Channel Bracket Nuts. Pop the Equalizer Arm off of the Fore-Aft Adjustment stud and the Channel Bracket off the Window Bracket.
Mustang Window Regulator Install Image
Mustang Window Regulator Install Image
8. You may need a screw driver to help pop them off. Jiggling the loose regulator and putting the window handle on, moving it up and down, might take some pressure off the arms allowing them to come off easier too. Slide the Channel Bracket off the regulator. Make sure to note the orientation of the Channel Bracket. It needs to be installed the same way.
9. Remove the regulator mounting bolts and remove the regulator through the large center hole in the Mustang door.
Mustang Window Regulator Install Image
10. Lube everything real good, even the new regulator. You may want to compare the old regulator to the new Window Regulator, as mine wasn't exactly the same and required a slight modification before installation. In my case, the tab on the regulator that holds on the spring was hitting the equalizer arm. Upon comparison, the tab itself is wider, so I used a grinder to make them equal. This is a modification that probably isn't going to be necessary, but be sure you check before installation to save yourself some time.
Mustang Window Regulator Install Image
Mustang Window Regulator Install Image
11. Insert the new regulator through the center hole and partially start the mounting bolts. Crank the regulator so the Fore-Aft Tilt Bolt lines up with the mark you put on the door and snug the bolt up. This will get the Channel Bracket close to the studs and Equalizer Arm close to the Fore-Aft Adjusting stud.
12. Slide the Channel Bracket on the regulator arm. Crank the Regulator to get the Channel Bracket on the studs. Watch the Equalizer Arm when you do this. It wants to go to the back side of the Fore-Aft Adjusting stud. When you get both on, install the nuts and tighten. This should get your window close to where it was unless it was adjusted to the worn out Regulator. I had to replace the window guide clips so I had lots of adjusting to do. After everything was adjusted, installation of the new Mustang Window Regulator was complete.