how much to rebuild FX35 transmission

[hangout_u]

I have the 2010 FX35 with only 75k miles. Recently, I found the transmission is not working good. From first gear, it will jump into second gear with high RPM.. also it will jump from second gear back to first gear with 1-2 second delayed when full stop .
I was wondering if I will need to rebuild the transmission to make it run smoothly again. I live in long island NY, how much to rebuild transmission around ?
Please advise, thanks.