Jeep wrangler transmission slips between shifts when cold

I’ve got a 2012 wrangler jku with 200k on her. On hot days she still drives great. When it gets cold the transmission slips between shifts until the fluid gets warm. Alternatively if you put it into sport mode it shifts fine, granted it shifts at higher RPM when you do this. Though I would think the higher RPM would cause more slip. The transmission has been serviced regularly and currently the fluid looks new and is at the correct level. Used transmissions for these things can set you back...

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