Upgrade your seat height with this brass gear repair kit for 2003-2005 Lincoln Aviator and 2002-2010 Mercury Mountaineer. This kit includes a brass gear, lubricant, adapter sleeve pin, and drill bit to repair your up/down motors efficiently. Ensure compatibility with your vehicle before purchase. Free shipping available! Item Description: Power Seat Height Up / Down Adjuster Motor Repair Brass Gear for 2003 - 2005 Lincoln Aviator / 2002 - 2010 Mercury Mountaineer. The gear is made of Brass. The brass gear works in both motor types (both short and long spindle). The package consists of Gear, Lubricant, Adapter Sleeve Pin and Drill Bit. **Please make sure your vehicle has this application, we offer free shipping on this kit. This gear only fits the up/down motors. It will not fit forward/backward gears. Part number Up/Down Adjustment rear Motor: Gen II B Vertical, 8-71234, 5709410 Part number Up/Down Adjustment front Motor: Gen II B Vertical, 8-71291, 5709770 Part number Up/Down Adjustment for front and rear Motor: Gen II B Vertical, 8-81902, 5709440 This is for one kit, Fix one side only. BRASS GEAR. Kit contains Gear, Lubricant, Adapter Sleeve Pin and Drill B. The brass gear works in both motor types (short and long spindle). Useful to repair the Up/down motors system of the seat. Not useful for forward-backward gear motors. If your two tilt motors are broken. please buy 2 kits. You will need them. Fitment for the following vehicles: 2003 - 2005 Lincoln Aviator 2002 - 2010 Mercury Mountaineer