Overview
This genuine ZF 4656.199.049 component is a critical sealing and alignment element engineered specifically for the WG 160 Series transmission. Positioned at the interface between the main gear case and the hydraulic control unit, this OEM part ensures precise oil flow regulation and prevents cross-contamination between lubrication circuits. The SKU 4656.199.049 is manufactured to ZF’s original tolerances, guaranteeing a direct fit without modification. When installed alongside the TRANSMISSION HOUSING, it creates a sealed environment that maintains consistent hydraulic pressure during load shifts.
Symptoms of Failure
- Oil seepage at the WG160 bell housing joint — Worn 4656.199.049 seals allow transmission fluid to escape, leaving visible drips under the vehicle after parking.
- Erratic gear engagement during cold starts — A degraded part disrupts pilot pressure, causing delayed or harsh shifts until the transmission warms up.
- Whining noise from the pump section — Air ingestion through a compromised seal creates cavitation sounds, particularly under heavy load.
- Intermittent loss of reverse gear — Internal leakage past this component reduces clutch pack apply pressure, leading to slipping in reverse.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.199.049 |
| Material | Nitrile rubber with steel insert |
| Outer Diameter | 89.5 mm |
| Inner Diameter | 72.0 mm |
| Thickness | 8.2 mm |
| Weight | 0.045 kg |
| Operating Temperature Range | -40°C to +150°C |
| Hardness (Shore A) | 70 ± 5 |
Compatibility
This genuine ZF 4656.199.049 seal is primarily designed for the WG 160 Series but also fits select variants of the WG180 and WG200 transmissions produced after 2012. It is compatible with both standard and high-torque versions of the WG160, including the WG160-5 and WG160-6 models. For proper installation, the HOUS.FRONT SECT must be clean and free of burrs, while the HOUSING REAR PART alignment is critical to prevent premature wear. In WG200 applications, verify that the HOUSING REAR SECTION has been updated to the latest revision before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing that supports all internal components |
| 4656201075 | HOUS.FRONT SECT | Front section housing the torque converter and pump assembly |
| 4656201077 | HOUSING REAR PART | Rear casing that encloses the planetary gear sets |
| 4656298049 | HOUSING REAR SECTION | Extended rear section for auxiliary drive take-offs |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 4656301148 | FIXING PLATE | Retains the seal in position against hydraulic pressure |
| 0636100817 | CAP SCREW | M8 fastener for securing the fixing plate |
| 4656301016 | SCREEN SHEET | Fine mesh filter for the lubrication circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for the main pump intake |
| 0636100803 | CAP SCREW | M6 fastener for screen sheet retention |
Frequently Asked Questions
Q: Can the 4656.199.049 be reused after transmission disassembly?
A: No. This is a single-use crush seal that deforms during initial torque application. Always replace it with a new OEM part to avoid fluid migration between circuits.
Q: Does this part require special tools for installation?
A: A standard seal driver set sized for 72 mm inner diameter is recommended. Never use a flat-blade screwdriver, as this can nick the sealing lip and cause immediate failure.
Q: How does this seal interact with the HOUS.FRONT SECT?
A: The 4656.199.049 sits in a recessed groove machined into the HOUS.FRONT SECT mating face. It creates a static seal that prevents high-pressure oil from leaking into the bell housing area.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
