Crankshafts
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- National®Front Crankshaft Seal (710332)Front Crankshaft Seal (710332) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$8.76
- National®Front Crankshaft Seal (710289)Front Crankshaft Seal (710289) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$8.99
- National®Front Crankshaft Seal (482041N)Front Crankshaft Seal (482041N) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$9.08
- National®Front Crankshaft Seal (471424V)Front Crankshaft Seal (471424V) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$15.26
- National®Front Crankshaft Seal (332062)Front Crankshaft Seal (332062) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$11.96
- National®Front Crankshaft Seal (1172)Front Crankshaft Seal (1172) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$9.77
- National®Front Crankshaft Seal (710313)Front Crankshaft Seal (710313) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$4.63
- National®Front Crankshaft Seal (472397)Front Crankshaft Seal by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$11.23
- National®Front Crankshaft Seal (710608)Front Crankshaft Seal (710608) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$12.41
- National®Front Crankshaft Seal Kit (5066)Front Crankshaft Seal Kit (5066) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$23.23
- National®Front Fluoro-Elastomer Camshaft Seal (223420)Front Fluoro-Elastomer Camshaft Seal (223420) by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic Edge technology that generates a...Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection$6.15
- National®Front Outer Differential Pinion Seal (710920)Front Outer Differential Pinion Seal (710920) by National®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by National...Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection$23.89
- National®Front Passenger Side Multi Purpose Seal Ring (710995)Front Passenger Side Multi Purpose Seal Ring by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...Made with precision and quality in mindDesigned to meet your specific needs$17.80
- National®Multi Purpose Oil Seal (710889)Multi Purpose Oil Seal by National®. Designed utilizing the latest technology, this product features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or exceed...Expertly crafted from premium materialsDesigned to match rigorous quality standards$9.22
- National®Passenger Side Multi Purpose Seal Ring (711013)Passenger Side Multi Purpose Seal Ring by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Made with precision and quality in mindDesigned to meet your specific needs$5.48
- National®Radial Crankshaft Seal (320691)Radial Crankshaft Seal (320691) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$9.53
- National®Rear Crankshaft Seal (710813)Rear Crankshaft Seal (710813) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$40.69
- National®Rear Crankshaft Seal (711132)Rear Crankshaft Seal (711132) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$49.88
- National®Rear Crankshaft Seal (711125)Rear Crankshaft Seal (711125) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$35.82
- National®Rear Crankshaft Seal (711126)Rear Crankshaft Seal (711126) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$13.74
- National®Rear Crankshaft Seal (711133)Rear Crankshaft Seal (711133) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$88.62
- National®Rear Crankshaft Seal (711128)Rear Crankshaft Seal (711128) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$34.21
- National®Rear Crankshaft Seal (711130)Rear Crankshaft Seal (711130) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$14.79
- National®Rear Crankshaft Seal (711127)Rear Crankshaft Seal (711127) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$62.39
- National®Rear Crankshaft Seal (711039)Rear Crankshaft Seal (711039) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$11.72
- National®Rear Crankshaft Seal (710879)Rear Crankshaft Seal (710879) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$16.78
- National®Rear Crankshaft Seal (711003)Rear Crankshaft Seal (711003) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$31.30
- National®Rear Crankshaft Seal (711030)Rear Crankshaft Seal (711030) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$84.86
- National®Rear Crankshaft Seal (710676)Rear Crankshaft Seal (710676) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$22.47
- National®Rear Crankshaft Seal (710894)Rear Crankshaft Seal (710894) by National®. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Temperature range: -40 to 400 °F / -40 to 204 °CCompatible with wide range of fluids$19.07
The crankshaft turns the reciprocating motion of the pistons and connecting rods into the rotational motion that turns the transmission gears, axle shafts, and ultimately the wheels. The crankshaft turns on its axis in the cylinder block. The connecting rods are attached to offset crank throws, which enable the conversion of motion. Cast iron is commonly used to make low output engine crankshafts, while forged steel is needed for high horsepower motors.
Crankshafts are stout, precision made components that with normal vehicle maintenance and use, should last the life of the vehicle. However, lax maintenance can result in dirt getting between the crank journals and bearings, or reduced oil flow, either of which can result in scored journals, increased clearance, metal-to-metal contact and engine knock. In such cases, the most economical repair with the least vehicle down time can usually be achieved with a crank kit, which includes a fully machined crankshaft and replacement bearings.
Oil leaks at the rear main seal are another common crankshaft malady. We have replacement seals and seal kits for all popular vehicles, but in cases of extreme wear the crankshaft seal contact surface can become grooved, making a replacement seal ineffective. However, there’s no need to completely replace the crankshaft if the sealing surface is marred. On our digital shelves you’ll find easy to install repair sleeves that are a press fit onto the crankshaft, creating a smooth surface for effective sealing and oil control.
Keep in mind that OE cranks aren’t up to the demands of a performance engine. Also, the constant pounding can cause hard-to-find hairline cracks to develop, and may even cause the crank to bend. If the journals are worn, regrinding may remove the surface case hardening. Don’t run a used OE crank and risk blowing up your engine. Be safe, and make a new performance crankshaft the cornerstone of your build.
We offer performance crankshafts for all popular engines, designed and manufactured by performance crankshaft specialists, in materials and configurations for every use and horsepower output. Cast steel cranks are relatively inexpensive yet can handle some serious power. Next up the ladder in strength and price are forged followed by billet steel cranks. Forged cranks are created by pressure forming heated steel in a die, while billet cranks are CNC machined from solid steel. Regardless of the material, all performance cranks are finish machined to a greater degree of precision than standard replacement cranks.
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