Do a search, the odometer fix is very easy!

basically, you just glue the zinc drive gear back onto the shaft with some LockTite, but be carefull, you can glue the wheels together too! This does NOT require removal of the shaft (the wheels go everywhere when you pull the shaft out, and I don't recommend you do so).

Any junkyard odo of the same vintage will have the same defect sooner or later.

Don't reset the trip odometer while the car is moving, it causes the odometer to bind and this makes the gear slip -- sooner or later it slips all the time.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!