545132 is a Spicer TTC front mainshaft nut. Our parts manual lists it in the Major Overhaul Kit for the Spicer ES52-7B and ESO66-7B transmissions, one per kit, alongside the rear mainshaft nut and its washer. Mainshaft nuts of this kind clamp a bearing or gear onto the shaft so it stays seated while the transmission carries load. A genuine Spicer TTC part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Front mainshaft nut, listed as Nut - Mainshaft Front in the factory parts list
Listed in the Major Overhaul Kit for the Spicer ES52-7B
Listed in the Major Overhaul Kit for the Spicer ESO66-7B
One per Major Overhaul Kit
Clamps a bearing or gear onto the mainshaft so it stays seated under load
