Timken 472144 Differential Pinion Seal - Rear

Timken 472144 Differential Pinion Seal

Timken 472144 is a differential pinion seal built to retain gear lubricant and block road debris from entering the axle assembly. It is a direct-fit sealing component for rear applications on select Oldsmobile and Pontiac vehicles, including Oldsmobile 98, Delta 88, Starfire, and Pontiac Bonneville and Catalina.

Key Features

• Precision sealing design helps control lubricant loss at the pinion area
• Reinforced outer case helps resist installation damage and improve durability
• Ribbed rubber inner diameter seals minor spindle imperfections and supports positive seating
• Internal contamination exclusion system helps keep debris out of the seal area
• Vent holes promote lubricant flow around the seal lip to reduce heat buildup
• Timken 472144 is a rear differential pinion seal for select classic GM applications

Detailed Description

Built for driveline sealing performance, this Timken differential pinion seal is engineered to help maintain proper lubricant retention at the pinion shaft while limiting contamination that can lead to leakage and wear. The reinforced outer case adds support during installation, while the ribbed inner diameter helps the seal conform to minor surface imperfections for a more consistent fit. Timken 472144 is a practical replacement choice for rear axle service on 1963-1965 Oldsmobile 98, 1965 Oldsmobile Delta 88, 1963-1965 Oldsmobile Starfire, 1963-1965 Pontiac Bonneville, and 1963-1965 Pontiac Catalina.

This part cross-references National 472144 for the same application.

What It Helps Repair

• Rear differential pinion seal leaks
• Gear oil seepage around the pinion area
• Contamination entering the axle seal interface
• Heat-related seal wear from poor lubricant circulation
• Seal damage caused by installation stress

Installation Notes and Tips

Inspect the pinion surface, housing bore, and surrounding components before installation. Clean the sealing area thoroughly and verify that the replacement seal seats evenly in the housing. For best results, confirm rear axle application details against the vehicle and axle configuration before ordering. Fits 1963-1965 Oldsmobile 98, rear; Fits 1965 Oldsmobile Delta 88, rear; Fits 1963-1965 Oldsmobile Starfire, rear; Fits 1963-1965 Pontiac Bonneville, rear; Fits 1963-1965 Pontiac Catalina, rear.

Quality Assurance

Timken oil and grease seals are built with precision sealing features and contamination control details intended to support reliable driveline service in demanding automotive environments.