View Full Version : Weird transmission problem?

09-07-2007, 03:54 PM
I'm not sure if this is mechanical tranny issue or something in the computer, but the car (1999 540i, auto, non-sport) shifts fine all the time except sometimes at WOT - like when speeding up to merge on a highway, then just when it's supposed to downshift (sport mode on) it's struggling, as if it's not sure if it should downshift or not. If I speed up gradually there are no problem and it shifts fine. Same issue is at lower speeds, when I floor it sometimes it downshifts and glues me to the seat but sometimes it's struggling and not speeding up at all.

Any idea what could be wrong..?

Also, in these situations I assume it's still better to rebuild transmission than get used one? Any idea on what would be fair price for a rebuild?