This pinion gear nut fits Mack differential carriers, holding the pinion shaft in place to keep bearing preload and gear mesh correct under torque and vibration. It is made by PAI and sold individually as a single-piece replacement for the drive pinion assembly.
Features
Differential drive pinion gear nut
PAI part number BNU-2318
Cross-references to Mack 21AX907 and 25110388
Sold individually (1 each)
PAI component
Tech Specs
- Part Number: BNU-2318
- Cross-Reference: 21AX907, 25110388
- Sell Pack: 1 Each
