BILLET ALUMINUM SPHERICAL DOGBONE MOUNT

The 034Motorsport Billet Spherical Dogbone Mount is the new standard in performance and durability. This dogbone mount was engineered with performance in mind, manufactured from billet aluminum and stainless steel, and features a genuine Aurora Spherical Bearing to maintain proper articulation and reduce NVH transfer. The Billet Spherical Dogbone Mount is machined and assembled in-house to eliminate the factory mount's slop. It will better withstand the forces generated by hard launches.

The result is a locked-down drivetrain, crisper shifting, and virtually no wheel hop. The Motorsport Dogbone Mount will cause increased noise, vibration, and harshness (NVH) inside the cabin.

BILLET ALUMINUM LOWER DOGBONE MOUNT INSERT

This precision-machined billet aluminum insert is designed to fill the large voids in the factory dogbone mount and limit transmission and engine movement without sacrificing ride quality or introducing any perceivable additional noise, vibration, or harshness into the cabin. By filling the void in the factory mount, this insert eliminates the associated slop and ensures that you're experiencing crisper shifts and a more direct, connected driving experience.

Engineered to work in unison with the factory rubber mount, this insert was designed using CAD software and thoroughly tested and refined to provide noticeable slop reduction without introducing excessive noise or vibration into the cabin, common with lesser designs. Unlike polyurethane insert options on the market, this billet aluminum part will not pack and wear over time and guarantees long-lasting performance.

BILLET ALUMINUM UPPER DOGBONE MOUNT INSERT

The 034Motorsport MQB Upper Dogbone Mount Insert (patent pending) is required for any MQB platform MkVII VW Golf/GTI/R, MkVII VW GLI, 8V/8V.5 Audi A3/S3/RS3 & MkIII Audi TT/TTS/TTRS using an aftermarket dogbone mount and dogbone mount insert. Aggressive driving that causes violent drivetrain movement, such as burn-outs that induce wheel-hop, will cause the upper and lower dogbone mounts to exert a bending moment on the arm, causing it to bend and sometimes fail. When this failure occurs, the engine's bottom is unconstrained, and the engine will cause damage to other components in the engine bay. The 034Motorsport MQB Upper Dogbone Mount Insert eliminates these bending forces, allowing the dogbone mount to perform as designed during these violent events.

An aftermarket billet spherical dogbone mount combined with a dogbone mount insert dramatically improves the drivetrain's feel and responsiveness during spirited driving. However, this combination of modifications and the MQB dogbone mount pucks' design constraints has revealed a scenario that applies forces to the dogbone mount arm it was not designed for.

The lower dogbone mount insert limits compliance of the lower dogbone mount puck by filling large voids in the puck. During normal and spirited driving, this reduction in compliance results in a more direct transitional response of the drivetrain to accelerative and decelerative forces. The driver feels a more direct throttle response through the drivetrain without introducing a significant amount of NVH.

However, violent drivetrain shocks, such as burn-out-induced wheel-hop, introduce additional forces that can cause damage to the billet spherical dogbone mount arm. In these violent events, the dogbone insert limits the lower puck motion, but the upper puck is unconstrained and free to move forward.

This means that the entire puck assembly rotates forward at an angle towards the front of the car. Because the dogbone mount arm is clamped into the puck assembly, the rotation of the puck assembly generates a bending moment applied to the dogbone mount arm that it was not designed for.

Our testing has shown that regardless of arms design and the material used, the arm cannot be made strong enough to withstand this bending moment. We tested arms manufactured using 6061 aluminum, 7075 aluminum, and stainless steel. The results were all very similar. The dogbone mount arm showed signs of bending with just two burn-out-induced wheel-hop events. Complete failure of the dogbone arm occurred in as few as four wheel-hop events. We are confident that other brands' spherical dogbone mounts will have similar failures.

This testing revealed the cause of the bending, and our engineering team developed the 034Motorsport Billet Upper Dogbone Mount Insert to solve the issue. This insert slips into the front void of the upper dogbone mount puck, limiting the upper puck's forward motion to match the limited forward motion of the lower puck with the lower insert installed. The result is an upper and lower insert package that eliminates the rotation inside the puck assembly during extreme drivetrain shocks and keeps the forces acting on the dogbone arm in the direction the arm was designed for. Subsequent testing showed no signs of bending or stress in the dogbone mount arm, with the upper and lower dogbone mount insert installed. Watch the demonstration video below to see how the dogbone mount pucks move with just the lower insert and the upper and lower insert combined.