Originally Posted by Xcelrrate
Power is off, and makes no difference in terms of this "jolt"
I know what you mean with the jerky-ness, I too had a E46 M3
I never exactly thought of it as a tranny issue, other than it jolt precisely @ 1500k & 1900k rpms.
Well then if you have had the E46 M you must know exactly what I'm talking about .. so it can't be that then! Perhaps just a tuning issue? But that said tuning is pretty uniform in these cars. Not sure if it was mentioned, but are you at high altitude? Is the fuel you are using an ethanol blend (e.g., 91 uprated to 94 with ethanol addition)?
I'm really just throwing things out there because other than what I've described (which you have actually experienced), it's hard to know what you mean... can you take a video of your tach?