I'm through with the drivetrain. I built mine with the gears sequentially. I am going to get an electric motor so I can see whats up with the transmission stalling, or if it will at all. I've also read that if you swap another couple of pieces around, it will fix the problem of multiple gears being engaged at the same time. I started to do that, but then I found that if I pulled the shifter farther back, that alone fixed the problem.
So all you do is build step 269 before 267? Or do you swap the gears they're suggesting? I haven't opened mine yet or looked through the online building instructions so I don't actually know what those steps entail.
So I have $30 worth of Lego VIP points expiring soon. I'm tempted to pick up 75875: Ford F-150 Raptor & Ford Model A Hot Rod