ZF 4656.183.271 LOOSE PARTS for WG171 | OEM Genuine Part

Overview

This OEM genuine ZF 4656.183.271 LOOSE PARTS set is a critical service kit designed specifically for the WG171 transmission series. It contains the essential loose hardware and small components required during a major overhaul or when replacing the main transmission housing. The SKU 4656.183.271 typically includes seals, fasteners, and positioning elements that secure internal assemblies within the gear train. When rebuilding a WG171 unit, this kit ensures that all small but vital components are replaced to factory specifications, preventing premature wear on larger assemblies like the TRANSMISSION HOUSING and the HOUS.FRONT SECT.

Symptoms of Failure

When the components within the 4656.183.271 loose parts kit begin to fail, operators will notice distinct operational issues. External oil seepage around the bell housing mating surface is a primary indicator, often caused by degraded O-rings or gaskets included in this set. A second common symptom is intermittent gear slippage under heavy load, which occurs when internal positioning pins or bolts loosen, allowing shafts to shift slightly. Third, you may detect abnormal metallic rattling from the transmission sump, suggesting that small fasteners have backed out and are circulating in the oil. Finally, difficulty engaging reverse gear frequently points to wear in the loose hardware that aligns the reverse idler assembly.

Technical Specifications

Compatibility

This genuine ZF 4656.183.271 loose parts kit is engineered primarily for the WG 171 Series transmissions. Based on the part type and application, it is also compatible with the WG 180 and WG 200 series when used in conjunction with the correct HOUSING REAR PART. Additionally, it fits select WG 150 variants that share the same bolt pattern and internal architecture. Always verify your transmission serial number against the OEM parts list before installation. The kit works in tandem with the SCREEN SHEET to ensure proper oil flow and filtration within the assembly.

Related Components

Frequently Asked Questions

Q: Can I reuse the old O-rings from my previous rebuild instead of using the ones in this kit?
A: No. The 4656.183.271 kit includes fresh O-rings and seals specifically formulated for the WG171. Reusing old rubber components will void any warranty and almost certainly lead to fluid leaks within 500 operating hours.

Q: Does this kit include the cap screws for the TUBE assembly?
A: Yes. The loose parts kit contains the necessary cap screws and cylindrical pins to secure the tube and screen sheet assemblies. However, for the main housing bolts, you should order 0636100803 separately if additional fasteners are needed.

Q: How do I verify this kit fits my specific WG171 variant?
A: Check the casting number on your transmission housing near the bell housing flange. If the number matches the WG171 series designation, this kit is compatible. For units with a modified rear section, you may also need the HOUSING REAR PART to complete the assembly.