I checked my odometer a few weeks back just for grins when I had the cluster out and i was trying to diagnose my non funtional temp guage.....

odometer was working but gear would slip with little effort..so I knew it was going to happen if I did nothing.

drove out the shaft slipped in a simmular sized drill bit to hold gears in place...

Used a cold chisel and a screwdriver handle to tap it to put 45 degree divits about 8 points across where the gear rides...slid shaft back in and taped locking piece back over the end to retain it...took all of 10 minutes once speedo was off cluster. really a very easy fix.....and one I know I will never have to deal with again.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche