its the plastic gears that are stripped. these mirrors suck for any type of movement hence why i always just left mine alone. if you use the drop down box by your left knee and set it to the middle (neither side selected), the mirrors will not tilt down when in reverse.
2006 Lexus GS 300 AWD – Glacier Frost Mica - Black - ML Package
20" x 8.5" Status Knight Wheels Black with Machine Face | Bridgestone G-Force Tires 245/30/20 | BC Racing Coilovers | Carson Tuned Lip Kit | 3000k HID Fogs | Prestigious Society Navi/DVD Override Kit | 15% Tint | Black Roof and Window Trim
Same problem here! The passenger side mirror always seems to adjust itself much more upwards than I had it set to. I'll put the car in reverse and both mirrors tilt down, but once I put it in drive the passenger mirror always moves too far up.