Some people have modified their suspensions and used coil springs for a 1966-1977 Ford Bronco. One of the problems is mounting the coil to the Dana 35 TTB axle beam. The Ranger coil is sandwiched between a coil seat and a dish shaped washer held in place by a nut on the center mounting stud.
The Ford Bronco coil sits inside of a cup and the coil slides into the square hoop that you see in the picture. You can see in the photo above that the Dana 35’s coil spring mounting stud was removed and now secures the Bronco lower mounting cup. In order to mount it, a hole has to be drilled into the center of the mounting cup for the stud to fit through.
(Extreme Duty Lower Coil Spring Cups, 66-77 Ford Bronco)
Above is a set of heavy-duty lower spring cups. In the photo below you can see that a hole was drilled into the center of the cup to mount it on the Dana 35 axle and was cut to fit around the knuckle where the steering knuckle mounts.
Others have made their own. On the one below, the coil sits around the mount and I’m guessing that the Rangers original dished cup that held the Ranger coil down goes back on and tightens down against the ring on the cup.
This is what the Bronco mounting cups look like on the Dana 44:
About The Author
Jim Oaks is the founder of The Ranger Station, one of the longest-running Ford Ranger enthusiast communities on the web. He has spent over three decades owning, modifying, repairing, and driving Ford Rangers on the street, trail, and cross-country routes.
Since launching TheRangerStation.com in 1999, Jim has documented thousands of real-world Ranger builds, technical repairs, drivetrain swaps, suspension modifications, and off-road tests contributed by owners worldwide. His work has been referenced by enthusiasts, mechanics, and off-road builders looking for practical, experience-based information rather than theoretical advice.
Jim’s hands-on experience includes long-distance overland travel, trail use, drivetrain and axle upgrades, suspension tuning, and platform comparisons across multiple Ranger generations. The content published on The Ranger Station is grounded in first-hand experience and community-verified data, not marketing claims or generic specifications.