I have pics if anyone is interested. This is from a 92 right front door. (The car was lightly T-boned and I put a JY door on. I saved the hardware off original door in case I needed something in future.)
The ‘lil gear on the motor is steel. I haven’t taken motor apart to see if worm gear is plastic.
About a year after changing door, I had a problem where every once in awhile the window would not move and just faintly click. All I did was remove switches on drivers and passenger door, check continuity, and put them back in. Everything has been fine since – probably was just weak or dirty connection.
All I can suggest is making sure nothing is binding, gears are meshing properly, and all connections/ ground/ switches/ circuit breakers are good. If all else fails, these ones are made very well (IMO) and I wouldn’t give a second thought to buying used part - or you are welcome to have this if it is the correct one for you.