RABROPAR steering shaft universal joint 3/4" 36-spline to 3/4" DD, 3-1/4" chrome, alloy steel, 4000 RPM

RABROPAR's chromed steering shaft universal joint is a heavy-duty 3/4" spline to 3/4" double-D coupling built for precise steering connections in SUVs, rock crawlers, street rods and performance projects.

This compact 3-1/4" overall length universal joint (u-joint) converts a 3/4" 36-spline input to a 3/4" double-D output, delivering a corrosion-resistant, high-strength link between steering components or drive assemblies. Constructed from alloy steel with an outer chrome finish, it’s engineered for workshop upgrades and repair jobs where accurate fit, durability and a limited envelope are required. The coupling supports up to 4000 rpm and is suited to applications from automated parking lifts to custom off-road steering shafts.

What sizes and splines does this RABROPAR coupling accept?

The unit has a 3/4" maximum bore at both ends: one end is 36-spline and the opposite is a 3/4" double-D profile. Total length is 3-1/4" and the outside diameter measures approximately 1-5/8". Verify spline and DD dimensions against your shaft before installation.

• Input: 3/4" inner diameter, 36 splines
• Output: 3/4" inner diameter, double-D profile
• Total length: 3-1/4" (overall)
• Outside diameter: ~1-5/8"

How durable is the joint for high-use steering or industrial duty?

Manufactured from solid alloy steel with outer plating, the coupling is built to resist wear and corrosion in routine driving and light industrial applications. It’s rated for a maximum operating speed of 4000 rpm and a maximum working angle up to 35° when correctly installed.

• Material: solid alloy/steel core for strength
• Finish: chromed plating for corrosion resistance
• Speed rating: up to 4000 rpm
• Working angle: up to 35° maximum

Which vehicles and machines will this universal joint work with?

This coupling is versatile for steering and drive linkages on custom and factory builds. It fits single steering shaft SUVs, rock crawlers, muscle cars, street rods, hot rods, sand rails, and can also be used in grinders, leveling systems, or automated parking lifts when the spline/shaft geometry matches.

• Automotive: street rods, muscle cars, hot rods, SUVs
• Off-road: rock crawlers, sand rails
• Industrial: grinding machines, levelers, parking-lift linkages
• Custom projects: steering conversions and shaft adapters

What installation and compatibility checks should I perform?

Measure the spline and DD bore diameters on your shafts to confirm they match the 3/4" specifications before ordering. Ensure set screws, retaining clips, or pinch-bolt arrangements on your shafts are compatible with a 36-spline to DD adapter and confirm the permitted operating angle in your steering geometry does not exceed 35°.

• Confirm 3/4" spline and 3/4" DD bore fit
• Check shaft retaining method (set screw, keyway, clamp)
• Ensure steering geometry stays below 35° working angle
• Use proper lubrication if joining moving shafts in service

Who is this for: This RABROPAR universal joint is intended for mechanics, custom builders and hobbyists who need a compact, robust spline-to-DD steering coupling. Choose it when you require a chrome-finished, alloy-steel connector for performance cars, off-road rigs, or light industrial machinery and you have shafts that match the 3/4" 36-spline and 3/4" double-D profiles. Always confirm dimensions and torque requirements for your specific application before installation.