i have a L3600 4x4 and was going down my dirt road and wanted to take it out of 4x4 so i stopped and did so. the front part of the front axle has a carrier bearing looking thing that lines up with the front drive shaft that i noticed was loose due to the bolts broke out of it so i replaced and fixed these two bolts now 4x4 wont work. the in cab lever still moves but front does not engage.