96 Sable 87k miles, odometer & trip meter sticking

Speedo and tach all working fine. Odo and trip meter stick on occasion. I can knock on it from the front and it starts up again. Simple lubricant issue?

On my 98 it was a tiny bit of extra plastic moulding on one of the number cylinders. It kept catching on the one next to it. Be careful taking the cylinder assembly out, I broke the clip holding the through pin. To fix the clip, I put some plastic model glue on it after the pin was in place. That was back around 110,000 miles. Currently at 290,000 with no further odometer problems.