CT1 Side Bell Axle Seal

The CT1 Side Bell Axle Seal from DIVERSIFIED MACHINE is an essential wear component designed to prevent gear oil leakage at the differential side bell housing. This seal serves a critical role in maintaining proper fluid retention within the axle assembly, protecting internal gears and bearings from contamination while preventing costly oil loss during aggressive driving, off-road use, or extended service intervals. Whether you're running a modified vehicle with upgraded axle components or maintaining a stock differential, a properly functioning side bell axle seal is fundamental to long-term drivetrain reliability.

Engineered by DIVERSIFIED MACHINE, the RRC-1104 seal utilizes precision elastomer construction designed to withstand the pressure cycling and rotational stress inherent to differential operation. The seal's geometry—measuring 3 inches in outer diameter with a 0.65-inch width—provides a tight interference fit that accommodates both OEM and lightly modified axle shafts. The compact design (3.55 inches overall length) ensures straightforward installation without requiring extensive disassembly, making this a practical maintenance item for both DIY mechanics and professional shops performing seal replacement or full differential rebuilds.

This seal is ideal for owners performing differential maintenance on vehicles that see regular track time, towing applications, or those upgrading to performance-oriented gear ratios that increase operational stress. Installation is straightforward—press fit the seal into the side bell bore, ensuring proper seating against the shaft shoulder before final assembly. Compatible with most rear-wheel and four-wheel-drive differentials using side bell configurations, the CT1 delivers dependable performance at a fraction of the cost of emergency differential repairs caused by oil contamination or leakage.