Put a smooth sealing surface back under the seal lip with the National Oil Seal Repair Sleeve 99174. It is listed as an Engine Crankshaft Repair Sleeve, a Transfer Case Input Shaft Repair Sleeve, a Transfer Case Output Shaft Repair Sleeve and an Automatic Transmission Oil Pump Repair Sleeve. It is cataloged for the 1988-1999 Chevrolet C1500 and K1500, the 1999-2013 Chevrolet Silverado 1500, the 1985-2005 Chevrolet Astro and hundreds of other applications. The catalog lists it for both front and rear positions, depending on the application.
A repair sleeve fits over the area of a shaft where the seal lip rides. It gives the seal a fresh surface to run against when the original contact area is grooved or worn. It is intended as an alternative to replacing or machining the shaft itself.
- One part, four listings: 99174 is cataloged under all four repair-sleeve names above, covering crankshaft, transfer case input and output shaft, and automatic transmission oil pump applications.
- Front and rear positions: listed for front and rear locations, depending on the vehicle.
- Engine coverage: the fitment includes All-engine listings plus specific codes L4-2.0L, L4-2.1L, L4-2.2L, L6-2.4L, L6-2.8L, L6-3.3L and L6-3.7L. Examples include the 1952-1953 Allstate A-230 [L4-2.2L] and the 1969-1971 AM General DJ5 [L4-2.2L].
- Broad application range: the listings include classics such as the 1946-1949 Buick Roadmaster Series 70 and later models such as the 1996-2014 Chevrolet Express 1500. They also include Buick, Cadillac, Chevrolet, GMC, Avanti II and more.
Signs a repair sleeve may be needed: a seal that keeps seeping oil after it has been replaced, or a visible groove worn into the shaft where the seal lip contacts it. Diagnose the leak source first. Follow the vehicle service information for the correct installation procedure.
See the Buyer's Guide tab for the full list of 500 applications and engine codes.
Interchange: N99174 · NN99174 · KWK99174 · 66594RS · 99174RS
This part cross-references / interchanges with the following part numbers:
99174, N99174, NN99174, KWK99174, 66594RS, 99174RS
