I once owned a 2001 TW-40' coach; however, I can't help you with gearing or electrical issues you may or may not have. ...But, I can ask if you bedroom slide has any damage to the underside of the slideout? ...Why?
Many of these bedroom slides have poorly constructed bottom supports. You can look for this damage by extending your slide; walking outside; and then looking underneath the slideout for deep cracks or other damage in the bottom of the slide paneling. This will create a lot of drag your bedroom motor.
The solution is to pick up 2 shinny aluminum plates (12" wide x 36"long) at HD or Lowes. I think it's 36" long, but maybe 24" will do the trick? I can't remember, but here a link I found at Lowes:
You need to check both stores for the type of plates that have decorative cross-hatch marks (diamond marks) on one side and a smooth bottom on the other side. These plates are used for foot steps in trucks.
* You want this type of shinny aluminum plate, because it's thicker than sheet metal, it is relatively "stiff", and it will not rust.
Anyway, to fix a bad slideout bottom:
* Pre-drill a lot of holes all the way around the long sides and only on one end of the plate and then countersink each hole.
* Apply polyurethane glue to the cross-hatch side
* Center and shove the non-pre-drilled end of the plate under the metal roller (you cannot see since it is behind the rubber seal) and align the drilled end of the plate with the outer edge of the slide.
* Use sort, countersink screws.
* Use polyurethane glue around the edges of the plate... and let dry overnight.
...And you are done! This job will take you 1.5-2hrs.