Transmission Not Changing Gears Until Warm

This is normal behavior if you are referring to it not engaging into Overdrive. You will only shift through the first three speeds until the engine reaches a certain temperature.

If only into overdrive it's normal when cold. But other gears first try checking fluid condition and level.

spar wrote:

Over drive needs 110f for it to shift , but normal maintenance is having a pro drop the trans pan, clean magnets, change trans oil, filter and new oil, at required intervals. I will bet 1000000$ you aint dont whats recommended, so you now ask a stupid question, of why its broke.