230SL automatic tranny

Just tried my 250s 30 minutes ago (on a very short distanse) and the tranny was shifting without sliping for 2 run and then......sliping like crasy.
Can it be the idle lifting switch connected to the Zenith carb?

Thanks

DAN

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DAN
1967 250s The Monster Project a.k.a "The Monster" a.k.a "Rolling Coffin" --sold--
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