FORMULA, WHITELINE, MSA, RIVAL Tailshaft Spacers

Tailshaft spacers are driveline components used in certain suspension setups to reposition the tailshaft and help compensate for changes created by altered ride height or driveline geometry.

When a vehicle is lifted, the relative positions of the chassis, axles and driveline components can change. On applications where this affects the tailshaft position or operating geometry, a correctly selected tailshaft spacer can help restore the required relationship between driveline components.

Tailshaft spacer kits are application-specific, so the correct solution depends on the vehicle, suspension configuration, spacer location and amount of correction required.

What Is a Tailshaft Spacer?

A tailshaft spacer is a machined component installed at a tailshaft mounting flange to reposition the tailshaft by a specified amount.

The spacer effectively changes the installed position of the tailshaft to compensate for additional distance or altered geometry created by certain suspension modifications.

Tailshaft spacers can be used at different positions depending on the driveline design and application. Fulcrum's current range includes both front and rear tailshaft spacer solutions.

A tailshaft spacer should not be considered a universal component for every lifted vehicle. Whether one is required, and the appropriate spacer specification, depends on the individual suspension and driveline configuration.

Why Suspension Lifts Can Affect Tailshaft Geometry

The tailshaft transfers rotational force through the driveline while accommodating movement between connected components.

Suspension geometry is designed around a particular relationship between the chassis, axles and driveline. Increasing ride height can alter some of these relationships.

Depending on the suspension and driveline design, a lift can change the tailshaft's operating position and the angles through which driveline joints operate.

The amount of change depends on several factors, including the suspension design, amount of lift and driveline configuration. This is why lifting a vehicle does not automatically mean that a tailshaft spacer is required.

Where the changed geometry creates a need for additional tailshaft positioning, an application-specific spacer can form part of the overall suspension and driveline setup.

How Does a Tailshaft Spacer Work?

A tailshaft spacer fits between compatible driveline mounting surfaces and moves the tailshaft mounting position by the thickness of the spacer.

This additional spacing can compensate for changes in the distance or geometry between driveline components after a suspension modification.

Because the spacer physically changes the tailshaft position, its dimensions and mounting arrangement need to suit the particular application.

Spacer position also matters. Depending on the driveline layout and suspension setup, a spacer may be required at the front or rear rather than simply being installed wherever convenient.

Correct fitment is therefore more important than choosing a spacer based solely on lift height.

Tailshaft Spacers and Driveline Vibration

Driveline vibration can sometimes appear or become more noticeable after changes to suspension height.

Altered driveline angles or tailshaft positioning can be contributing factors, but vibration should not automatically be diagnosed as a tailshaft spacer problem.

Driveline vibration can have multiple causes, including universal joints, bearings, tailshaft condition, wheel and tyre issues and other driveline components.

Where inspection determines that changed tailshaft positioning following a suspension modification is contributing to the issue, the appropriate spacer may form part of the correction.

This is why the suspension and driveline should be considered together rather than treating a tailshaft spacer as a universal fix for vibration.

Tailshaft Spacers as Part of a Suspension Lift

A suspension lift changes more than ground clearance and ride height. It can alter the operating position of several connected components. The tailshaft is one part of this system.

After changing suspension height, driveline geometry should be considered alongside other areas affected by the modification. The amount of correction required varies between applications, and some suspension configurations may require additional components while others may not.

A tailshaft spacer should therefore be selected as part of the complete suspension and driveline setup. Using an application-specific spacer helps ensure its dimensions, mounting points and position are appropriate for the intended installation.

Choosing the Right Tailshaft Spacer Kit

Start with the vehicle and suspension configuration rather than selecting a spacer based on size alone.

Confirm whether a tailshaft spacer is required for the suspension setup and identify whether the correction applies to the front or rear tailshaft.

The required spacer specification can depend on the suspension modification and driveline configuration. Check the individual product specifications and fitment information before purchasing.

If driveline vibration or noise has developed after a suspension modification, have the cause properly inspected before assuming a spacer will resolve it. Correct diagnosis can help identify whether tailshaft geometry is contributing to the problem or whether another driveline component requires attention.

Professional installation can also help ensure the spacer and associated hardware are correctly fitted and the driveline is checked as part of the modified suspension setup.

Shop Tailshaft Spacers with Fulcrum Suspensions

Choose a tailshaft spacer based on your vehicle, suspension setup, driveline configuration and the position requiring correction. Check the individual product specifications carefully to confirm the correct tailshaft spacer kit for your application.

Tailshaft spacers are part of our chassis parts range and may be needed after fitting a 4x4 lift kit, depending on your driveline. On independent front ends, diff drop kits address a similar change in CV angles.

Shop tailshaft spacers with Fulcrum Suspensions, with fast dispatch available on in-stock kits and professional installation available through Fulcrum workshops.