1966-77 Bronco Chassis

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Full IFS, 4WD chassis with triangulated trailing arm rear. Designed from scratch, utilizing the latest 3D scanning technology and and our in-house engineering to create a one of a kind package for the 1966-77 Bronco.

Offering 12″ travel in the front and 13″ in the rear, we created this chassis with the smaller body of these classic trucks in mind.  Dual rate springs optimize ride quality and performance working with Fox Factory series 2.5″ twin tube bypass shocks and 2.5″ coilovers.  We also configured this package to accept Coyote/6R80 or LS/4L80 drivetrain packages with an Atlas 2 Speed transfer case.  The RS4R chassis was also designed to allow the use of 285 series tires and +17″ wheels on all four corners without the need for fender opening mods.

RS4R Independant Front Suspension with fabbed upper and lower control arms 56″ width
GM 6×5.5 sealed hub assembly
Fox factory 2.5″ twin tube bypass shocks
Fox Factory 2.5″ Coilovers and external bumps
CNC Laser cut and contoured box tube main rails
Utilizes all stock body, bumper, and core support mounts
12″ front Travel and 13″ rear travel
Engine mounts for LS based or Coyote
Structural, center crossmember with transmission and transfer case mounts
4140 chromoly machined spindles with 300m axle shafts and 934 CV’s
Heavy wall fabbed triangulated trailing arm rear suspension
High 9 PRO Iron , Tru Tac front and rear differentials 4.86 gear

– Notes –
54.5 ” rear end for stock ( unflared) rear wheel well openings
60″ rear end for flared rear wheel openings

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Rear Disc Brake Options


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