It sounds like either it is off track or the regulator is damaged. If you loosened any of the nuts on the door when you had the panel off, you may have taken the equalizer out of adjustment.
I'm going to provide the directions for replacing the glass. It includes the regulator, adjustment, and so on. Take a look through it. Pay most attention to the equalizer bracket nuts and make sure the regulator motor is tight.
You are not replacing the window, but these are the only directions I have that provide what I feel is needed. The attached pics correlate with the directions.
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2002 Ford Truck Explorer Sport 4WD V6-4.0L VIN E
Removal and Replacement
Vehicle Windows and Glass Windows Window Regulator Front Door Window Regulator Service and Repair Removal and Replacement
REMOVAL AND REPLACEMENT
Heavy Duty Riverter
Pic 1
SPECIAL TOOL(S)
REMOVAL
1. Raise the front door window glass to the full up position.
2. Remove the interior door handle.
3. Support the front door window glass.
Pic 2
4. Disconnect the front door window regulator motor electrical connector.
Pic 3
5. Remove the equalizer bracket nuts.
Pic 4
6. Remove the front door window regulator.
1 Remove the rivets.
2 Remove the nut.
Pic 5
7. Remove the front door window regulator motor.
1 Remove the bolts.
2 Remove the front door window regulator motor.
INSTALLATION
1. To install, reverse the removal procedure.
Use the special tool to install the rivets.
Cycle the door glass to make sure of engagement of the drive mechanism.
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I have a feeling something was left loose by accident.
Let me know if this helps.
Joe
Images (Click to make bigger)
Monday, February 10th, 2020 AT 7:33 PM