autopilot nav-o-matic mooney

My 1964 Mooney has a factory installed ARC Nav-o-matic 300 autopilot. It was working properly 5 years ago when I bought the plane, but only in warm weather. This unit has a dedicated gyro behind the baggage compartment for roll and yaw control and I figured the grease in those bearings had...

I own a 1964 Mooney Super21 that has an OEM ARC/Cessna Nav-O-Matic 300 autopilot. It has been working but I noticed it did not work in cold temperatures. When I started having the same problems with my AI and DG I concluded the grease or oil in the instruments was getting old, so I pulled both...