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3900176 | Cummins B-Series Crankshaft with Gear, New

Pricing: $723.23

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Don't risk your your engine to some no-name, sub-par Crankshaft.

There's no throwing a bandage on a bad crankshaft. In fact, trying to limp along is only going to cause more damage. Keep your rig running strong for another million miles- without emptying your pockets- with a Crankshaft from HHP. 

Forget choosing between quality and price. HHP only offers premium aftermarket parts at up to 50% off OEM prices. While most believe aftermarket retailers sell cheap parts with zero warranty, HHP is here to kick that stereotype to the curb. HHP provides Crankshafts with no core charge and a 2-Year Parts and Labor warranty. How?s that for an aftermarket part?

Need a little extra proof? Let's talk Crankshafts.
  • You'll get equal or better quality compared to the OEM at a much lower price! So don't let the cost of a crankshaft weigh you down.
  • Also manufactured and assembled in an ISO 9001: 2008 certified facility, ensuring quality and consistency! In other words, quality you can trust!
  • Built to OEM specifications to ensure proper engine fitment. So don't chance your old crankshaft, having a properly functioning crankshaft is essential for engine performance.
  • At HHP our ASE certified techs are here to help you get back up and running in no time.


  • (1) Crankshaft with Gear


2-Year Parts and Labor Warranty

OEM Applications

  • CUM3908031
  • 3908031
  • 3907803
  • 3929036
  • 3903830
  • 3863276
  • 3905617
  • 3903827
  • HE3907803
  • K3907803

Technical Data

With Gear

Cummins B-Series Engine Specifications:
Year: 1983-1998
Liter: 3.9
CID: 239
Cylinders: L4
Bore/Stroke: 4.0157-4.0173" (101.999-102.039 MM)4.724" (119.990 MM)
Compression Ratio: 16.3:1 RATIO
Firing Order: 1-3-4-2

Tune-Up Specifications:
Oil Pressure At Idle: 30 PSI @ 1300RPM
Intake Valve Lash: .010" COLD
Exhaust Valve Lash: .025" COLD (.635 MM)

Make sure the crankshaft is properly cleaned before you lubricate it, or the lubrication will not be effective.


  • P204038
  • P204038
  • IMB
  • New

Shipping Information

  • Item Requires Shipping
  • 102.0 lbs.

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