2004 John Deer Buck Utility ATV 500, 500EX and 500EXT Service Manual, Page 211Get this manual
Subtract the measure "J" from measure "H" then add this result to "G"Note this result "K"G(HJ)(housing inside length) Measure ring gear lengthThis is measure "L" V04H05A
V04h05a2.EPS
Add measure "M" from measure "N"Subtract this result from measure "L"Note this result "P"V04H0CA
V04h0Ca2.EPS