Ford Suspension
Caster Correction
When lifting a leaf spring equipped vehicle such as a Dodge or GM, the front axle is not rotated significantly, if at all, and caster is not adversely affected. But with coil spring Fords, the radius arms, mounted stationary to the frame rails, cause the axle to rotate forward as ride height is increased, and proper caster angle is lost. The lift height at which caster related driveability problems surface depends on what the reading was at pre-lift ride height. Caster differs as much as 5 degrees on the same year model vehicles! The “rule of thumb” is: For each 1" of lift, you lose approximately 1.2 degrees of caster. Each 1" drop of the radius arms restores approximately 1.8 degrees of caster. Caster can be changed with degreed C-bushings and/or by lowering the radius arms at their frame attaching points. We suggest using C-bushings alone on lifts up to 3”, and drop brackets with C-bushings on anything taller. The coil springs’ lower seats bolt to the top of the radius arms. As caster is lost, the seats rotate forward, causing the springs to bow forward. C-bushings cannot correct spring bow because they install around the axle tubes underneath the coil spring seats. The problems associated with coil bow are: lost ride height, premature spring fatigue and / or failure due to uneven stress, spring-to-spring tower contact, and warped or “creaking” seats. Radius arm bushing wear is also accelerated from a severe arm-to-bracket contact angle. All of these problems are amplified as lift height is increased. We advocate using Urethane C-bushings and radius arm bushings on all early Fords. Keeping the front axle “tight” is critical. The major fault of the factory rubber insulators is their propensity to work out of position. Urethane C-bushings have molded “lips” to keep them in place. Also, Urethane is not adversely affected by the elements and does not dry rot.

Fits 1966-79 Ford ½ ton pickup and 1978-79 Bronco. Bolts between frame and stock radius arm brackets. Gives 4 to 5 degrees positive caster. Packaged with enough Grade 8 mounting hardware for 1978-79 models. Bolt kit #1375 required for 1966-77 models.

Part No. 1475 RADIUS ARM LOWERING BRACKETS, 4.5” DROP - Same vehicle application as #1275. Gives 7 to 8 degrees positive caster. Recommended for lifts of 6” to 7". Bolt kit #1375 required for 1966-77 models. NOTE: Vehicle must be equipped with a 1310 series front driveshaft, CV or single-joint style, because of shaft angle at transfer case. The 1310 joint has an overall cross-length of 3.218".

Part No. 1375 RADIUS ARM BOLT KIT - Fits 1966-77 ½ Ton pickup. Consists of the following Grade 8 hardware: Quantity 12 each of 7/16" x 1-1/4" bolt with self-locking nut and quantity 24 each of 7/16" extra-thick flatwashers.

Part No. 2475 RADIUS ARM LOWERING BRACKETS, 4" DROP - Fits 1966-77 Bronco. Gives 4 to 5 degrees positive caster. Recommended for lifts of 4" and taller. The stock radius arm brackets are welded to the frame. The Superlift brackets are positioned over the stock brackets and welded in place.

Radius Arm Lowering Brackets and C-Bushings Recommendations
Vehicle Lift 2475 1275 2202 2204 2207
66-77 Bronco 3 1/2 X or     X  
5 1/2 X and   X or   X alone
78-79 Pickup and Bronco 1-2       X  
4-5   X and X or   X alone
6   X and   X  
All bushings fit 1966-79 Bronco and ½ ton pickup.

Part No. 2202 - 2 Degree C-Bushing set
Part No. 2204 - 4 Degree C-Bushing set
Part No. 2207 - 7 Degree C-Bushing set

Part No. 1104 “DROPPED” PITMAN ARM - 1976-79 F-100 / 150 and 1978-79 Bronco, all with power steering. Installing arm on 1977 (some 1976) pickups requires converting the inverted “Y” steering linkage to the 1978-79 type. Use Superlift’s adjustable drag link and tie-rod assembly to complete the conversion.

Increased drag link angle can produce erratic handling characteristics similar to those associated with improper caster angle (darting and wandering). Extreme angle can cause the drag link end studs to bind and possibly shear off. The Superlift pitman arm decreases drag link angle in relation to the tie rod. Our dropped pitman arm is recommended, not required, for 4" lift. The arm is highly recommended with 6” of lift and required with anything taller. Do not use pitman arm with lifts shorter than 3". It will cause the link to make contact with the tie-rod.
Part No. 1114 LATE MODEL ADJUSTABLE DRAG LINK - 1978-79 F-100 / 150 and 1978-79 Bronco (except F-150 Super Cab with front leaf springs). Will fit 1976-77 models if tie-rod assembly and pitman arm are replaced also. This part replaces the one-piece stock link. A threaded sleeve allows “on vehicle” adjustment to restore equal side-to-side turning radius and steering wheel center. These two functions are noticeably affected on lifts over 4". If not initially purchased with the lift, definitely consider the link when the factory unit wears out. Will adjust from stock length to long enough to accommodate 6.5” of lift.
TIE ROD ASSEMBLY - This is a OE quality factory replacement part. Same applications as #1114 link.

Part No. 1115-1 Left-hand (short) end for driver side.
Part No. 1115-2 Right-hand (long) end for passenger side.
Part No. 1115-3 Adjusting sleeve. Connects left and right hand tie-rod end.

Part No. 2114 EARLY BRONCO ADJUSTABLE DRAG LINK - For 1966-75 model Bronco with drum front brakes. Offers same benefits as #1114. Fits stock height Broncos and those lifted up to 5.5".

Adjustable Track Bars
This is an innovative approach to an old problem. The track-bar locates the body / frame in relation to front axle. It runs from the passenger side of the front axle up to the driver side frame rail. When lifted, the body / frame shifts toward the passenger side. This is definitely noticeable with lifts over 4"; normally 3" to 4" is considered borderline. If the vehicle is already lifted, view it from the front and see if the tires are centered underneath the body. We have seen this corrected by sectioning and lengthening the stock bar. This is not advisable because of the expertise required. Other manufacturers offer a bracket to lower the stock bar at it’s frame attaching point. The problem is that the amount the bar needs to be lowered (or lengthened) is seldom the same from one rig to the next. When using a drop bracket, you may get too much or not enough body shift. Another problem is stress created by the extra leverage of the longer bracket. Eventually this can lead to stress cracks in the frame rail.
The Superlift track-bar avoids these problems by mounting in the original location and having enough threaded length adjustment to cover lift heights from stock to 9" on pickups and late model Broncos. The early model Bronco bar covers from stock height to 5.5” of lift. Includes Urethane eye bushings and wear sleeves.

Part No. 1085 ADJUSTABLE TRACK-BAR - Fits 1966-75 ½ ton pickup.
Part No. 1080 ADJUSTABLE TRACK-BAR - Fits 1976-79 ½ ton pickup and 1978-79 Bronco.
Part No. 2085 ADJUSTABLE TRACK-BAR - Fits 1966-77 Bronco.

NOTE: Also order #2085-76 UPPER END, INNER SLEEVE for 1976-77 models equipped with stock bar having an oblong shaped upper eye bushing.
Order Information
To Order or for More Info on Superlift Suspension Systems feel free to call us at 1-800-388-8637. We carry a complete line of Superlift Suspension Systems along with many other lines of lift kits.

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