Shifts hard when going into 2nd when the fluid is cold. After it gets to operating temperature it shifts like a champ. Did a drain and fill last night and cleaned the sludge off the filter. Runs better today but still has the hard shift into 2nd when cold. No check engine light either. l did not know if this is a transmission issue or if it is another problem that is affecting the transmission because it does not happen when it gets to operating temp. Any help would be appreciated.
Thx
The fluid level shows full. What other problem could it be?

transmission fluid expands when it gets hot, therefore raising the level of trans fliuld. when its cold your trans fliud is at its lowest point. when your trans fluid is cold it will take a short time to biuld up pressure and when it does it send a shock. this is what you are feeling. l would recommend you fill transmission properly .

there may be a service bulletin about this model on Lexus.com. From the home page, click owners.
Or call the Lexus service department about your concern and see what they recommend. Advise is free, since service with a dealer can be pricey.