[RenalInsult]

2015 M6 Cab with about 67k miles has an issue that only happens when accelerating in second gear. When the car slows and is in second gear, and accelerates, the RPMs increase but then there is about a one second pause in acceleration, then you feel a jarring/slam depending on how much throttle used. It almost feels like it is slipping then catching. It occurs in drive or sequential, but only when accelerating in second gear.

From a dead stop it is perfectly normal. Shifting from first to second to third and so on seems perfectly normal, smooth, no slipping or delays. I checked with a scanner and no codes. The battery is only a year old, I did slow charge it fully but it didn't seem to help.

I would think if it i clutch issue, it would occur in all the even gears? If a transmission issue, why no issue shifting from first to second?