You've got the right idea.

You need to keep the Locktite away from anything that needs to turn freely.

I don't remember exactly what I did but I think I slid the shaft in the direction you show just enough to get the die cast gear off and then roughed up the shaft with needle nose pliers. I wanted the Locktite to have a better chance to grab the shaft so I just kind of abraided it rather than chewed it up.

I applied a tiny drop of Locktite with a toothpick, you don't want much since it could wick into places you don't want it to go. After that, it was a matter of putting it together, adding a drop of oil to the end of the shaft where it rides in the end of the frame to keep the Locktite from bonding it in case I got too much on it and then letting it sit overnight.

You can find another method by Googling "vdo odometer repair" and picking the hit that refers to Porsche odometers. Do not post a direct link to this method due to forum rules.

Michael

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Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033
Current have, 1983 300SD 126.120