I have a very bad vibration through the shifter at high load in 3rd gear. The vibration isn't relative to speed, as long as I'm in 3rd gear at moderate or high load, it will shake and rattle. I also noticed that there is quite a bit of longitudinal slop. This doesn't happen in any other gear.
Mine is a '04 with the 3650.
Mine is a '04 with the 3650.