[mustangman45601]

Hi everyone.

OK, I have an odd shifting problem with my 2012 535I xdrive. So, when accelerating forward in automatic, when the transmission shifts from 1st to 2nd gear, it hits hard. It also feels like it engages and disengages a couple times before it finally fully locks in. It shifts smooth in all other gears and downshifts smooth in all gears. It's not as noticeable when the car is cold but is VERY noticeable once the car is warmed up. Now, here is the weird part, it doesn't do it when accelerating while turning. So, when you are at a stop and you are turning either left or right, it shifts smooth as butter from 1st gear into 2nd gear. Why?

Things I have done:
1st - Replaced fluid and filter. No change
2nd - Replaced all shifting solenoids on the mechatronics. Replaced fluid but reused same filter/pan since it was barely used. No Change

I feel like its something internal to the transmission since it only does it when shifting into 2nd gear. However, I'm confused why it doesn't do it while turning in either direction? Why would it shift smoothly while turning?

Any Ideals?