Just purchased a 2020 Alpina B7 with 19,000 miles on it. This is my 10th 7 series in 30 years and I've never experienced this issue before:
During moderate acceleration, the driveline shudders erratically as though the transmission or transfer case is "slipping" in and out of gear. I've even noticed it while gently accelerating and turning from a stop sign. During hard or full throttle acceleration, the car does not shudder. Local BMW dealer says he found no codes, and 87 octane in the tank (not sure how he determined the octane rating...). He suggests burning that out & fill with 93 (doing that today). I always use 93 when the car calls for it, but this car was delivered to me with a full tank. I highly doubt that low octane fuel is the culprit, but this is a B7, so the 4.4l engine is modified to produce 600hp.
Any ideas? Thanks!
