Does any one know how beefed up the 2011 Allisons really are?
What are the real differences in the drive train?
Did they put different style clutch packs like aftermarket style one's in them and did they go with a bigger better torque converter?
And is the trans brake same as previous years or is it actually a retarder like an exhaust brake?
Also are they still running the same transfer case and if so did they modify the clip on the pump shaft that causes the dreaded wear hole in the cases? Just curious.