I did a search and could not find what was a definitive answer to my question.

I have an '81 240D auto and it shifts 1st and 2nd normally. Then at the proper time shifts to 3rd, stays for a second, and on to 4th.

The bowden cable seems like it adjusts the shifting on all gears, I'm having problems only with 3rd to 4th. Would adjusting the bowden cable then change 1st to 2nd as well?

The K-1 spring - I read some posts that said it fixed similar problems others were having and some said it had no effect at all.

Am I missing something in thse posts that the more experienced can extract?

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1981 240D, Auto Trans, 160k miles -- CRASHED!