This is gear set information for the DANA H-12 series of trans axles that are common in GEM, EZGO and other brands of recreational vehicles. The first numbers are the tooth counts, the second set of numbers are the individual ratios per set. The ratios multiplied together give the overall ratio. Note: The 8.9 and the 10.35 use the same primary set of gears. The sets of gears may be mixed to obtain other ratios.
GEM TOOTH COUNT
8.9 TO 1 – 27,53, – 26,118 – ratio 1.96 – 4.54
10.35 TO 1 --27,53, – 22,116 --ratio 1.96 --5.27
12.44 TO 1 --21,55, – 24,114 --ratio 2.62 --4.75