Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1987 Ford Bronco II 4WD V6-177 2.9LFACTORY OEM SERVICE PROCEDURE
Door Glass - Flutters/Slaps When Partially Open
89ford03
Article No. 89-4-9
GLASS - DOOR - FLUTTERS OR SLAPS WHEN WINDOW IS PARTIALLY OPEN
LIGHT TRUCK: 1986-88 RANGER, BRONCO II
ISSUE: Door glass flutter or slap when the window is 3 or 4 inches from the full up position may be caused by a glass adjustment mechanism that does not adequately support the glass. The affected vehicles are units with manual windows and units with power windows that do not have vent windows.
ACTION: Install a new door glass retainer assembly to support the door glass. Refer to the following procedure for service details.
1. Raise the front window to the full up position.
2. Remove the door trim panel and watershield. Refer to the appropriate model year Ranger/Bronco II Shop Manual for service details.
3. Drill two (2) 23/64" holes in the door inner panel at the front end of the door, Figure 1.
4. Insert the door glass run retainer assembly through the window regulator access hole in the door, Figure 2.
5. Position the glass run retainer assembly and loosely install two (2) screws through the drilled holes in the door inner panel. Let the glass run retainer assembly hang freely. Do not tighten the screws.
6. Carefully lower the window slowly until the bottom front edge of the window engages the glass run retainer assembly. Then, lower the window completely to position the glass run retainer assembly.
7. Tighten the two (2) glass run retainer assembly retaining screws.
8. Cycle the window up and down to make sure it operates correctly.
9. Reinstall the watershield and door trim panel.
10. Repeat Steps 1 through 9 for the other window if necessary.
PART NUMBER PART NAME CLASS
E9TZ-1021572-A Retainer Assembly - R.H. B
E9TZ-1021573-A Retainer Assembly - L.H. B
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
890409A One Window 0.6 Hr.
890409B Both Windows 1.0 Hr.
DEALER CODING:
BASIC PART NO. CONDITION CODE
7021572 56
OASIS CODES: 1300
Article No. 89-4-9
GLASS - DOOR - FLUTTERS OR SLAPS WHEN WINDOW IS PARTIALLY OPEN
LIGHT TRUCK: 1986-88 RANGER, BRONCO II
ISSUE: Door glass flutter or slap when the window is 3 or 4 inches from the full up position may be caused by a glass adjustment mechanism that does not adequately support the glass. The affected vehicles are units with manual windows and units with power windows that do not have vent windows.
ACTION: Install a new door glass retainer assembly to support the door glass. Refer to the following procedure for service details.
1. Raise the front window to the full up position.
2. Remove the door trim panel and watershield. Refer to the appropriate model year Ranger/Bronco II Shop Manual for service details.
FIGURE 1:
3. Drill two (2) 23/64" holes in the door inner panel at the front end of the door, Figure 1.
FIGURE 2:
4. Insert the door glass run retainer assembly through the window regulator access hole in the door, Figure 2.
5. Position the glass run retainer assembly and loosely install two (2) screws through the drilled holes in the door inner panel. Let the glass run retainer assembly hang freely. Do not tighten the screws.
6. Carefully lower the window slowly until the bottom front edge of the window engages the glass run retainer assembly. Then, lower the window completely to position the glass run retainer assembly.
7. Tighten the two (2) glass run retainer assembly retaining screws.
8. Cycle the window up and down to make sure it operates correctly.
9. Reinstall the watershield and door trim panel.
10. Repeat Steps 1 through 9 for the other window if necessary.
PART NUMBER PART NAME CLASS
E9TZ-1021572-A Retainer Assembly - R.H. B
E9TZ-1021573-A Retainer Assembly - L.H. B
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
890409A One Window 0.6 Hr.
890409B Both Windows 1.0 Hr.
DEALER CODING:
BASIC PART NO. CONDITION CODE
7021572 56
OASIS CODES: 1300
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.