Is it possible to find out what transmission software version my X5 has? Does anybody know what the latest software version is?

I have this hard shift to 2nd gear when the car coasts. If I accelerate up to ~15mph and then coast, the transmission loves to slam into 2nd gear and it is a terrible feeling. It is fine under regular and hard acceleration. Going to change the original fluid to some WalMart Dexron VI, but I'm wondering if it could be software related.

3 liter motor. GM transmission.

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