ZF 5838.026.008 REAR AXLE | OEM Genuine Part

Overview

The ZF 5838.026.008 REAR AXLE is a critical load-bearing component within the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part transfers rotational torque from the differential directly to the wheel hubs, ensuring precise power delivery under extreme loads. As a hardened steel axle, it interfaces directly with the 5838109021: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING to maintain axial alignment. The SKU 5838.026.008 is specifically machined to OEM tolerances for ZF powershift transmissions, providing a direct replacement without modification.

Symptoms of Failure

• Excessive rear axle end-play or vibration: When the axle splines wear or the shaft becomes scored, operators will notice a pronounced shudder during acceleration, especially under load in reverse.
• Oil seepage at the hub seal interface: A worn 5838.026.008 can damage the adjacent sealing ring, leading to visible gear oil leaks around the wheel end, often mistaken for a simple seal failure.
• Intermittent loss of drive or wheel hop: If the axle shaft twists or develops micro-fractures, the transmission may momentarily lose torque transfer to one wheel, causing erratic movement on uneven terrain.
• Metallic grinding noise during turns: A failing rear axle often produces a low-frequency grinding sound when the differential is under stress, indicating spline wear against the 2095209019: DIFFERENTIAL.

Technical Specifications

Compatibility

This rear axle is engineered for ZF powershift transmissions commonly found in wheel loaders, graders, and telehandlers. Based on its spline geometry and bearing seat dimensions, the 5838.026.008 is compatible with the following ZF transmission models: WG180, WG200, 4WG180, and 4WG200 series. It also fits select ZF Ergopower final drives used in agricultural tractors. Always verify the axle length against your existing shaft before installation, as variations exist between early and late production runs.

During replacement, technicians should also inspect the 0631329086: SPRING PIN that secures the axle to the differential carrier, as this pin is prone to shearing under shock loads.

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