The transmission has an integrated computer that controls shifting, cooling, etc. The lines between that and the speedometer are flaky, so every once in a while it'll decide to not cool itself, get stuck in 2nd/3rd, etc, etc.

I have an additional 15 years of cool down I consider another Stellantis product. By then, they won't be selling ICE, for one thing. For another, the current engineers will be long gone.