2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 347Get this manual
REAR DRIVING MECHANISM PINION GEAR INSTALLATION Drive the pinion gear assembly into the gear caseTOOL: Oil seal driver 07965-KE80200 or 07947-KA50100 OIL SEAL DRIVER
NOTE: Keep the driver centered with the bearing outer race during installation
Install new lock nut and tighten itTOOL: Lock nut wrench, 30 64 mm
wrench reading information on page 17-3 "Service Information'
07916-MB00002