PAIR OF Power Wheels #7 style gearboxS:
13T (13Teeth on Gear of Motor) - 3/4" Axle Hole
Early Jeep Hurricanes
15T (15Teeth on Gear of Motor) - 1/2" Axle Hole
Grave Diggers, Brute Force,
(Later Jeep Hurricanes 3/4" axle holes)
16T (16Teeth on Gear of Motor) - 1/2" Axle Hole
Escalades, Beach Ranger Jeeps, Silverados, Eliminators DuneBuggies
17T (17Teeth on Gear of Motor) - 1/2" Axle Hole
Arctic Cats
19T (19Teeth on Gear of Motor) - 1/2" Axle Hole
KFX Quads, Jeep Wrangler and Mustangs with 19T motors (some are 21T)