Control Arm Roto-Joint End, ¾”-16 Left Hand Thread- GM B-Body
This fabricated Roto-Joint is designed to replace spherical rod ends on UMI Performance control arms for the 1978-1996 GM B-Body. This item will also work on many other brand control arms for the above listed vehicles that utilize a ¾”-16 left hand threaded rod end. See part # 0020 for right hand threaded Roto Joint.
This Bushing end is designed to replace ¾”-16 left hand threaded rod ends by simply removing the rod end and screwing in this Roto-Joint assembly. This item works excellent to replace worn out rod ends or rod ends making unbearable noise. The Roto-Joint is an easy replacement and is supplied fully assembled with grease fitting, new jam nut and a clear zinc finish. Bushing width is 2.600” with 3/4”-16 right hand threads, 2.000” of thread adjustment and accepts a 14mm bolt. Our replacement bushing end features threads CNC machined from 4140 Chrome Moly steel, DOM tubing and TIG welded for superior strength and thread durability.
Spanner Wrench- This spanner wrench is used for adjusting and disassembling Roto-Joints used in all UMI Performance products. Over time if the delrin race inside the Roto-Joint would wear the spanner wrench is used to tighten the adjusting ring applying more pressure to the delrin inside. The spanner wrench is also used to disassemble the Roto-Joint for cleaning, inspection and rebuilding.
More about Roto-Joint Technology….. UMI's Roto-Joint, short for Rotational Joint allows 28 degrees of total rotation and unrestricted movement through out the vehicles suspension. The Roto-Joint is designed to work like a spherical rod end but is street-able like a polyurethane bushing set-up. The Roto-Joint is designed to articulate and prevent suspension bind, however during straight line operation the delrin race and spherical ball will not deflect like polyurethane and rubber bushings. This provides improved traction and reduced 60-foot times. The Roto-Joint features a chrome moly, hard chrome plated spherical ball which rides in a delrin race. The 4140 chrome moly material and hard chrome plating on the spherical ball are designed for extensive wear resistance. The spherical ball rotates in the CNC machined delrin bushing; the delrin bushing is contoured for the spherical ball to allow unrestricted movement as the ball rotates. Delrin is the bushing material of choice due to its high resistance against wear, great tensile strength and ability to maintain its physical properties. The UMI Roto-Joint is also adjustable and 100% rebuildable. After many miles and a long period of time the delrin bushing inside may begin to wear. Using the spanner wrench you can simply turn in the adjusting ring to add more pressure to the bushings for a tighter seat. If the delrin bushings would ever wear beyond adjustment you can simply and inexpensively replace them.