On Tuesday November 13th while riding my 2006 KingPin in the countryside of Lancaster PA. I sufferd a catastrophic and extremely dangerous transmission failure. 100 Cube inch, 6 spd. I was aproaching a Stop sign and downshifting from 4th to 3rd . There was a loud bang, the engine halted, and the rear tire locked up. I came to a screaching halt in the middle of the road. It was through forces unknow that I did not crash or get hit by another vehicle. The gears were mashed tight withthe rear wheel locked up. Pulling in the clutch did not release the rear tire. I had to enlist the help of some passersby to brute force the bike off of the road. A flat bed was required to remove the bike from the scene. I have opened a case with Polaris industies (2567831)and the bike is at Herlenys Victory/Polaris in Elizabethtown PA. The bike is completely disassembled. The engine is out with the jugs off and the cases split. They found "shift dogs" from the gears broken off in the case.Thegears are toast. 2-3-and4th. Ther rear tire is bad from the skid.This bike has 18K miles. I have driven it since 400 miles.It has been dealer maintained using Victory oil and adhering the the factory maintenance schedule. It has never been riden hard. It has never been down, nor in an accident. I dare not think of the outcome I were in a turn or going faster. It could have been the end. I am waiting to hear from Polaris customer service on this issue. I will keep you all posted on how this is handled.