I just bought 2003 grizzly, that guy told me that the front diff sensor is bad and it acts like it is in locked 4x4 so the computer wont let it run over about 20 mph. He said that he read on some forums about jumping the sensor wires to by pass it??? If ne 1 can shoot me in the right direction it would be awsome...

 

look i doubt that it is the sensor i had the same problem from shifting into diff lock while rolling it breaks off the contacts inside the servo the pert is like 300 dollars but i came up with a solution i pulled it apart and saw the contacts were broke i carfully drilled out where the old plastic rivits were and installed alluminum rivets you have to grind them down after this so they dont touch the contacts this has fixed my problem and i use it all the time in and out of diff lock about 500 miles usage now let me know how it turns out for you