Cummins 4B 3.9L, 6B 5.9L Rear Crankshaft Seal, New (3353978)

When it comes to Rear Crankshaft Seals, why risk your engine?

Don’t let a small part turn into a major repair. We wouldn’t risk putting sub-par parts into our engines, so why should you?

4BTdiesel only sells Rear Crankshaft Seals that are manufactured in a state of the art facility using top of the line machining and measuring equipment to ensure each part is manufactured to OEM specifications. Combine this with up to 50% off OEM prices, an industry leading 6-month warranty and technical expertise from 4BTdiesel’s certified staff, and you’ve got a quality rear crankshaft seal that will keep you running for another million miles.

Need a little extra proof? Let’s talk shop.

• Some places won’t tell you where they get their parts, but we aren’t like some places. You will receive a brand new rear crankshaft seal that is manufactured and assembled in an ISO 9001 certified facility.
• It can be a hassle trying to find the right parts but we can help. All 4BTdiesel parts are crafted to strict OEM specifications which gives you proper fit and function.
• If you have the questions, we have the answers. We have professionally certified factory mechanics on staff to answer all of your technical questions.
• Your parts should last the rest of your life not the rest of the year. This rear crankshaft seal is built with hard wearing materials for long lasting strength and durability.
• Make your dollar stretch further at 4BTdiesel. Our parts have equal or better quality compared to the OE at a much lower price.

Contents

• (1) Rear Crankshaft Seal 

Warranty

6-month warranty.