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The solenoids are a failure item, and they can on failing cause hard or 'jerky' shifts.

You can check the transmission pony tail to ensure none of the connections are worn or crimped. I think in the shop manual there is also a way to check resistences across the pins of the connector to determine the health of some portions of the transmission -- see here http://www.caddyinfo.com/4t80e_componentresistencechart.htm


2023 Cadillac CT4-V Blackwing

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