2005 Kawasaki KAF400 Mule 600 and Mule 610 4x4 Service Manual, Page 199Get this manual
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9-30 TRANSMISSION Differential Gears and Shift Mechanism
Remove: Lever Stop Bolt [A] Shift Shaft
Differential Shift Shaft Nut [B] Differentia Shift Shaft Lever [C] and Spring [D]