Hey everyone, I have a 2010 135i with the automatic gearbox. Today I've noticed some strange behavior from the transmission that was not present in my 2008 335i. When I'm in manual mode, I've noticed that occasionally the car will randomly upshift at WOT without any input from me. Each time it happened at around 3-5k RPM, no where near redline. It's happened to me from 3rd where it would randomly upshift to 4th. My buddy drove my car and he said it happened 2nd to 3rd as well. I can not replicate this issue when I try, it just happens randomly. No warning lights on dash. Also, a side note, I honestly feel like my 335i pulled harder after the MHD flash than my 135i does with the same flash. Can't figure out why. Any thoughts?
Appreciate0
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Originally Posted by Pelican Parts
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