[MA2-335]

I changed my transmission fluid the other day following a DIY posted in the DIY section. I changed the fluid using Castrol Multi-Vehicle ATF.

Unfortunately my car no longer up-shifts very well from gear 3-4. It feels like it slips for half a second especially when the car is cold. The gear shift between 3-4 gets better as the engine/transmission warms up. Once the gear is engaged there are no problems at all. All the other gears shift as they did before which is a good thing. Downshifting from 5-4 has no problems at all.

Im not sure what the problem could be. I got ~5 liters back in the tranny while filling using the instructions given in this DIY. Could it be that my transmission fluid is a little low/too high? or that the castrol ATF is not mixing well with the oem fluid.

what is the best way to check the tranny temperature while filling?
what is the best way to heat up the transmission? (should i drive it around to warm it up)
I started the vehicle on jack stands for about 10 minutes while filling with an outdoor temperature of ~60 degrees Fahrenheit.

BTW my e92 335i has 60,000 miles on it and had no tranny problems prior to changing the fluid. I did this DIY because my mechatronic sleeve was leaking.

Any help or suggestions would be great
I will repost once I figure out the problem

Thanks