Keep differential gear lubricant sealed in and dirt and water out with the SKF Differential Pinion Seal 13978. This seal sits stationary in the pinion bore while its lip rides against the rotating pinion shaft, and it drops in as a direct-fit replacement for a wide range of Nissan applications — the 1970-1973 240Z, 1980-1986 720, 1986-1994 D21, 1995-1997 Pickup, and many more (see the Buyer's Guide tab for the full list). The catalog lists this seal for both FRONT and REAR positions.
Key features:
Dimensions: 1.378 in inside diameter, 2.650 in outside diameter, 1.378 in shaft diameter, and 0.709 in width. Country of origin: Japan.
Interchange: 3818901G00 · 38189U3000 · 975913978 · CHR 13978 · CHR13978 · AH2134E0 · 71-13978 · 7113978 · L81-6590 · L816590 · 145813978 · R13978 · 27SS2463 · 13978CHR · 2116534 · N-13978 · N13978 · 66767 · 6500078 · Manufacturer part number 13978.
This part cross-references / interchanges with the following part numbers:
What does this pinion seal do?
It seals around the drive pinion where it enters the differential, helping keep gear lubricant in and dirt and water out. The seal body stays stationary while its lip contacts the rotating pinion shaft.
Will this seal fit my Nissan?
It is listed as a direct-fit replacement for many Nissan applications, including the 240Z, 720, D21, and Pickup. Check the Buyer's Guide tab to confirm your exact year and model.
Is this for the front or rear differential?
The catalog lists this seal for both FRONT and REAR positions. Confirm your application in the Buyer's Guide tab.
What are the seal's dimensions?
It measures 1.378 in inside diameter, 2.650 in outside diameter, 1.378 in shaft diameter, and 0.709 in width.
What are signs this seal may need replacing?
Gear oil seepage or drips around the pinion area can indicate a worn seal. If a failed pinion seal is the cause of the leak, this replaces it; diagnose the source before ordering.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
