Pinion gear only that mounts to the end of the drive shaft. 10 tooth gives you a 4/1 ratio when used with a 40 tooth ring gear. 12 tooth gives you a 3.25/1 when used with the original Ruckstell 40 tooth or modern 39 tooth ring gears. U.S.A.
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This product has additional items that other customers have found useful or are necessary for proper installation, please check them out.
Keeps the pinion gear from turning on the end of the drive shaft. U.S.A.
The special thin castellated nut that holds the pinion gear onto the drive shaft. Original Ford. U.S.A.
