Lubing the worm gear and glass track center/sides can be done front the roof. The motors in these have plenty of torque, they aren't undersized. If the glass is out and the track moves freely on the gear and sides, then I'd suspect the motor has a problem. I know there is a rear access panel over the back seat, but I can't remember if you can access the motor from there or not. If so, then take it out for service. The headliner requires removing the rear glass and I think the small side windows in order to take it down, a big job.
Lubing the worm gear and glass track center/sides can be done front the roof. The motors in these have plenty of torque, they aren't undersized. If the glass is out and the track moves freely on the gear and sides, then I'd suspect the motor has a problem. I know there is a rear access panel over the back seat, but I can't remember if you can access the motor from there or not. If so, then take it out for service. The headliner requires removing the rear glass and I think the small side windows in order to take it down, a big job.