Overview
This OEM genuine ZF 4656.199.019 component is a critical internal sealing and alignment element designed specifically for the WG 160 Series transmission. Positioned within the main gear train housing assembly, this part ensures precise hydraulic fluid channeling and maintains structural integrity under high-torque conditions. The SKU 4656.199.019 serves as a direct replacement for worn units, restoring factory-specified clearances and preventing cross-contamination between lubrication circuits. When installed alongside the 4656101037: TRANSMISSION HOUSING, it forms a sealed boundary that supports consistent shift quality and thermal stability.
Symptoms of Failure
- Progressive hydraulic fluid seepage around the WG160 bell housing area, often mistaken for a simple gasket failure, leading to low fluid levels and erratic clutch engagement.
- Delayed or harsh gear engagement during cold starts, indicating that the 4656.199.019 has lost its dimensional stability, allowing pressure bleed-off in the valve body circuit.
- Metallic debris in transmission fluid during routine sampling, caused by fretting wear between this part and the 4656201075: HOUS.FRONT SECT, which accelerates internal contamination.
- Audible whining or grinding noise from the transmission mid-section under load, often misdiagnosed as bearing failure, but actually stemming from misalignment of the 4656201035: HOUSING REAR PART interface.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.199.019 |
| Material | High-grade aluminum alloy with nitrile sealing surface |
| Weight | 0.42 kg (0.93 lbs) |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 32.0 mm |
| Height / Thickness | 18.2 mm |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4656.199.019 (Genuine) |
Compatibility
This genuine ZF part is engineered for the WG 160 Series transmission family. It is also compatible with the WG 180 and WG 200 variants where the housing architecture shares the same sealing groove pattern. The 4656.199.019 interfaces directly with the 4472239178: HOUSING REAR PART to create a leak-proof joint. Always verify your transmission model code before installation, as later WG 220 units may require a revised spacer profile.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing that supports all internal gear sets |
| 4656201075 | HOUS.FRONT SECT | Forward housing section that aligns the input shaft and pump |
| 4656201035 | HOUSING REAR PART | Rear housing segment that encloses the output shaft assembly |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant for specific WG160 sub-models |
| 0631306816 | CYLINDRICAL PIN | Precision dowel pin for housing alignment during assembly |
| 4656301148 | FIXING PLATE | Retaining plate that secures internal components against axial movement |
| 0636100817 | CAP SCREW | High-tensile fastener for housing joint clamping |
| 4656301016 | SCREEN SHEET | Fine mesh filter screen for hydraulic circuit protection |
| 4656301017 | SCREEN SHEET | Alternative mesh screen with different micron rating |
| 0636100803 | CAP SCREW | Shorter cap screw for auxiliary bracket mounting |
Frequently Asked Questions
Q: Can the 4656.199.019 be reused if it appears undamaged?
A: No. This OEM part is a single-use sealing component. Even minor compression set or surface glazing will compromise hydraulic pressure retention. Always replace with a new genuine ZF unit during any major housing disassembly.
Q: How do I confirm this part fits my WG160 transmission?
A: Check the transmission data plate for the exact model code (e.g., WG160-6). The 4656.199.019 is used in units manufactured after 2012. For earlier models, measure the groove depth in the 4656201075: HOUS.FRONT SECT to ensure compatibility.
Q: What torque specification applies to the adjacent cap screws?
A: For the 0636100817: CAP SCREW and 0636100803: CAP SCREW that secure the housing sections, use 25 Nm (18.4 lb-ft) in a cross-tightening pattern. Over-torquing can distort the 4656.199.019 sealing face.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
