THIS! between MDS and no sequential shifting you loose so much power through the trans its not even funny. If you live in an area with hills you will know this first hand. if your traveling at 35-40 mph, start an incline you are stuck in 5th gear, you have to press the petal to the floor to get it to come out of MDS, and downshift gears, at this point you have dropped to about 25mph and slam into second gear at WOT, once it shifts you up your back at the same situation again. Horrible transmission. the 8 speed does none of this, its smooth and fast and predicts load way better than the 6speed. Theres a reason they dont offer the 6 speed on the 1500's anymore
from what I understand the 6 speed on the HD's had sequential shifting and a much better TC, its a totaly different transmission