Make sure this part fits

Jeep R4781507AC Crankshaft

2008-2011 Jeep Wrangler R4781507AC

Customer Questions & Expert Answers (3)
R4781507AC Mopar Crankshaft Illustration 1 of 1
  • Part Description
    CRANKSHAFT
  • Replaced By
    R8264642AA
  • Manufacturer
    Mopar
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Jeep
    Manufacturer Part NumberR4781507AC
    Part DescriptionCRANKSHAFT
    Item Dimensions26.6 x 12.9 x 9.7 inches
    Item Weight51.10 Pounds
    ConditionNew
    ManufacturerMopar
    SKUR4781507AC
    WarrantyThis genuine Mopar part is guaranteed by Mopar's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2008-2011 Jeep Wrangler6 Cyl 3.8L70th Anniversary, Rubicon, Sahara, Sport, Unlimited Rubicon, Unlimited Sahara 2WD, Unlimited Sahara 4WD, Unlimited Sport 2WD, Unlimited Sport 4WD, Unlimited X 2WD, Unlimited X 4WD, Unlimited X RHD 4WD, X, X RHD
  • Customer Questions & Expert Answers

    Q:
    Is this part guaranteed to fit my truck?
    A:
    You can Select Your Vehicle to check if R4781507AC fits your vehicle.
    Posted and answered by Mopar Parts Specialist Reggie
    Q:
    What options are available if the Crankshaft oil seal journals are damaged for the 2009 Dodge Grand Caravan? Posted by Dominika N.
    A:
    An automotive machine shop may repair the journal by pressing on a thin sleeve, but if repair isn't feasible, a new or different crankshaft should be installed. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Mopar Parts Specialist Sean / Sep 07, 2025
    Q:
    What should you do if the endplay of the Crankshaft exceeds the typical range for the 2009 Jeep Wrangler? Posted by Anand V.
    A:
    Inspect the crankshaft thrust surfaces for wear after removal. If no wear is found, new main bearings should resolve the issue. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Mopar Parts Specialist Reggie / Dec 19, 2024

Genuine Mopar Part R4781507AC, the Right Choice

To ensure reliability, purchase Mopar part # R4781507AC Crankshaft. It is sometimes referred to as Crankshaft. The OEM parts should be used when the Mopar owners want to maximize their driving experience. The high-tech factories that produce these parts utilize sophisticated technology specifically designed to meet stringent factory requirements. Additionally, they are thoroughly tested and can thus be used with reliability by Mopar owners. This part fits specific Jeep Wrangler models.

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