ZF 4656.073.008 3 WG 171 Powershift Transmission Assembly | Complete Unit

Overview

This complete ZF 4656.073.008 3 WG 171 Powershift Transmission Assembly is a fully integrated unit designed for heavy-duty industrial applications. As a core component of the WG 171 series, this assembly manages torque distribution and gear engagement in wheel loaders, forklifts, and construction machinery. The SKU 4656.073.008 replaces the entire transmission assembly, ensuring seamless power flow from the engine to the drivetrain. It sits directly between the torque converter and the output shaft, incorporating multiple planetary gear sets and clutch packs. For optimal sealing and structural integrity, this unit integrates with the 4656101028: TRANSMISSION HOUSING and the 4656301066: HOUS.FRONT SECT to form a leak-proof assembly.

Symptoms of Failure

• Erratic gear engagement or slipping under load: Worn clutch discs or damaged seals inside the 4656.073.008 cause delayed shifting or loss of power during operation, often accompanied by a burning smell.
• External oil leaks from the transmission case: Degraded gaskets or cracks in the housing lead to fluid seepage, visible as drips around the bell housing or output flange.
• Unusual whining or grinding noises: Bearing wear or gear tooth damage within the assembly produces metallic sounds, especially during acceleration or deceleration.
• Overheating or erratic hydraulic pressure: A failing pump or blocked passages cause the transmission to run hot, triggering warning lights or erratic shift patterns.

Technical Specifications

Compatibility

This complete transmission assembly is engineered for the ZF WG 171 series. It is directly compatible with models including the WG 171, WG 180, and WG 200 series used in loaders, telehandlers, and industrial tractors. The unit also fits select variants of the WG 150 and WG 250 series when used with the appropriate adapter plates. For precise fitment, verify the bell housing pattern and output flange configuration. The assembly requires the 4656201015: SCREEN SHEET for filtration and the 4656301037: TUBE for hydraulic fluid routing.

Frequently Asked Questions

Q: Is the 4656.073.008 a direct replacement for my existing WG 171 transmission?
A: Yes, this complete unit is a factory-spec replacement for the ZF 3 WG 171 series. Ensure your vehicle uses the same bell housing pattern and output flange configuration as the original assembly.

Q: What additional parts should I replace during installation?
A: We recommend replacing all seals, gaskets, and the filter screen. The 0634313514: O-RING and 0636100803: CAP SCREW are commonly needed for reinstallation.

Q: Does this assembly include the torque converter?
A: No, this is the transmission assembly only. The torque converter is sold separately. Verify your existing converter is compatible with the 3 WG 171 input shaft.

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