DoctorDiff Drivetrain Components

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Axle Pkg Custom Length Mopar 5X4 1/2" Bolt Pattern (pair)

$300.00
Measurements must be OUTSIDE HOUSING END TO OUTSIDE HOUSING END to the nearest 16th of an inch. Do not measure axle flange to axle flange, drum to drum, or rotor to rotor. Your rearend must be disassembled to properly measure these dimensions.
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DoctorDiff high-strength, 30 or 35 spline axle package includes lug studs and Green sealed wheel bearings INSTALLED.  

"Big bolt pattern conversion axles" fit any '65 and newer, 5 x 4 1/2" Mopar spec rear disc or rear drum brake package.  

  • 8 3/4" rears came standard with 30 spline axles.  Running 35 spline axles in an 8 3/4" rearend requires a spool (not Mark Williams).
  • A popular upgrade for cars with 8 3/4" rears is to swap the original rearend for a cut down Dana 60 truck housing with 30 spline axles.
  • Mopar passenger cars equipped with Dana 60 rearends came with 35 spline axles.

Please make sure you know what you have before buying replacement parts!  Stock length axles are available here.

If you need help deriving the correct measurements, use the Housing/Axle Calculator, and enter dimension "C" using the dropdown boxes above.  The caclulator will load in a new window, so you can return to this page when you are finished.

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