Drive shaft pinion gear only. 13 tooth pinion gear. Use with 39 tooth ring gear for 3-1 ratio, Often used with Ruckstells OR use with a #2518R 40 tooth ring gear for a higher gear ratio of 3.0769-1. (NOT FOR USE with a Standard Ford Factory 4 40 tooth Ford ring gear.)
This is the Pinion Gear ONLY that mounts to the end of the drive shaft. Made with high quality, 4140 heat treated steel. Excellent quality.
Lang’s Tech Tip! If you have pits or wear on your current large ring gear, it is not recommended to change only the pinion gear. It will cause noise and accelerated ring gear failure. If you have any question it is best to change the set.