I have a 2006 sportsman 500 EFI HO. Frt diff intermittently stop engaging. Disassembled and found 1 spring on cage broken and adjuster plate worn. I have battery voltage to diff and 28 ohms thru the coil. I replaced cage with springs, armature plate, rollers and adjuster plate with OEM. Installed back in the machine and no AWD at all not even intermittent any more. Removed diff again energized coil with jumper batt. armature won’t hold cage enough to engage. What am I missing?