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DHD 600-300MRL 38 Spline 300M SRW Axle Kit with Locker 2001+ Duramax 11.5 AAM

600-300MRL - Z
Due to weight and dimensions this product is excluded from free shipping.
Pricing: $3,299.00

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This kit fits SINGLE REAR wheel GM trucks.

This extreme duty axle and locker kit from DHD is ideal for those running exotic engine builds with extreme power output. Our kits include 300M rifle drilled 38-spline axle shafts splined specifically to our own pitch and pressure angle to increase axle shaft durability. This specific combination of parts, manufacturers and materials are hand picked by us as result of our own competition vehicles.  You wont find a more robust setup for the AAM 11.5 axle. To achieve ever bit of additional shaft strength we have increased the shaft outer diameter which may require spindle reaming. As a general rule of thumb, trucks 2010 and down typically require reaming. LML and L5P spindles usually clear our shafts. Reamers designed specifically for the job can be purchased or rented from us.


  • Truck Pulling
  • Dirt Drags
  • Drag Racing
  • Street Trucks
  • Mud Trucks

Axle Kit Includes:

  • 300M Rifle Drilled Axle Shafts
  • Billet Aluminum End Caps
  • Heat Treated Drive Flanges
  • Axle Retention Snap Rings
  • DHD 38 Spline Mechanical Dirty Locker

Note: Due to DHD's proprietary spline dimension our shafts will not work in conjunction with a Yukon Spool or Grizzly Locker! You must purchase our spool or locker.


Dirty Hooker Diesel, LLC (DHD) axle shafts are warranted to be free from defects in material and workmanship to the original purchaser. DHD will NOT warranty axle shafts due to breakage that is NOT the fault of a manufacture defect. We do NOT warranty axle shafts and spools due to breakage. If you believe that the breakage is due to a manufacture defect, we will have it analyzed by the manufacture, and it will be up to the manufacture if the item is warrantable.

Shipping Information

  • Item Requires Shipping
  • 130.0 lbs.
  • W36.0000” x H18.0000” x L18.0000”

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