If tires are 27.5 inches tall with a 3.73 rear gear then if drive gear is Pink 7 teeth then use a 19 tooth driven gear truck code J. If drive gear is black 8 teeth then use a 21 tooth driven gear truck code L.

What color is your present drive gear? On your driven gear housing it should say what driven gear teeth can be used.


1959 GMC 100 Fleet
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