Wheelbase Stretch Kit for Jeep CJ

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The Motobilt Jeep CJ Wheelbase Stretch Kit is designed to use Jeep XJ rear leaf springs on the rear of your Jeep CJ (1976-1986). Installing this kit moves the rear axle back about 6 inches. The kit incorporates a custom rear bumper and shackle hangers in one part. The shackle hangers are positioned high on the bumper to keep the overall Jeep ride height lower for better center of gravity. The ends of the bumper are tapered in to allow better clearance for the shackles with the rear axle at full drop.

The kit comes with a custom set of leaf spring shackles designed to clear the bumper in the range of movement. The rear bumper also features 3/4 inch thick d-ring recovery mounts that pass through the bumper and welded on both sides. The bumper welds to the back of the factory cross member and has two side frame plates to cover the sides. This kit does include new spring shackles as noted. The shackles are CNC laser cut from 1/4 inch high strength steel plate.

The shackles measure 4 inches center to center and do have a 3rd cross bolt for additional support. The kit does not include poly bushings. The kit does require removing the factory gas tank. Many people install an aftermarket fuel cell.

  • Jeep CJ Wheelbase Stretch Kit
  • Fit 1976-1986 Jeep CJ
  • The bumper is 3/16 inch laser cut steel plate
  • 3/4 inch thick d-ring mounts
  • Incorporated shackle mounts
  • Moves the axle back 6 inches
  • Measures 38 inch wide
  • Works perfect with Stretch Fuel Tank & Skid for Jeep CJ part number MB5040
  • Sold as kit


  • Hardware NOT included qty (6) 1/2”x5” Grade 8 bolts with locker washers and nuts. 
  • Shackle bushing kit sold separately PN BushingKit. Only 1 kit is needed.
  • Includes new shackles and shackle spacers
  • The kit does require removing the factory gas tank
  • Many people install a Motobilt fuel cell in the cab or our under body stretch tank. MB5040
  • You do not outboard the springs like you would on the front.  You will cut your spring perches off if necessary on wider axles and weld new ones on in the correct position. 
  • Weight: 35lbs (approx.)

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