Overview
This OEM genuine ZF 4656.056.152 component is a critical internal seal and guide element designed specifically for the WG 160 series transmission. Positioned within the hydraulic control unit, this part ensures precise oil flow regulation and maintains proper pressure balance during gear shifts. The SKU 4656.056.152 acts as a wear-resistant interface between the valve body and the transmission housing, directly influencing shift quality and torque converter lockup behavior. As an original ZF part, it guarantees exact fitment and metallurgical compatibility with adjacent assemblies.
Symptoms of Failure
- Erratic shift timing and gear hunting – When the 4656.056.152 wears, hydraulic pressure fluctuations cause delayed or harsh engagement between gears, particularly during uphill climbs or heavy-load operation.
- Transmission fluid seepage near the valve body – Deterioration of this sealing element leads to visible oil leaks around the TRANSMISSION HOUSING, often mistaken for pan gasket failure.
- Torque converter shudder at low RPM – Worn internal clearances allow pressure loss, creating vibration during lockup in 3rd and 4th gears.
- Burnt transmission fluid odor – Inadequate sealing causes localized overheating, accelerating fluid degradation and producing a distinct acrid smell.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.056.152 |
| Material | Hardened steel with nitrile rubber sealing lip |
| Outer Diameter | 38.5 mm |
| Inner Diameter | 22.0 mm |
| Height | 14.2 mm |
| Weight | 0.045 kg |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4656.056.152 |
Compatibility
This genuine ZF part is engineered for the WG 160 series but also cross-references to WG 180, WG 200, and WG 150 transmissions produced after 2012. It is commonly replaced alongside the HOUS.FRONT SECT and HOUSING REAR PART during full valve body overhauls. For complete rear section restoration, the HOUSING REAR SECTION should also be inspected for cracks or warpage.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear train and valve body |
| 4656201075 | HOUS.FRONT SECT | Front section housing for pump and torque converter |
| 4656201077 | HOUSING REAR PART | Rear housing section supporting output shaft |
| 4656298049 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 4656301148 | FIXING PLATE | Retains valve body components in position |
| 0636100817 | CAP SCREW | M8 fastener for housing bolt connections |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump pickup |
| 0636100803 | CAP SCREW | M6 fastener for valve body cover plate |
Frequently Asked Questions
Q: Can I install the 4656.056.152 without replacing the housing gaskets?
A: It is strongly recommended to replace all mating gaskets and seals, particularly those on the HOUS.FRONT SECT and HOUSING REAR PART, to prevent future leaks.
Q: How do I verify this part is genuine OEM and not an aftermarket copy?
A: Genuine ZF 4656.056.152 parts feature laser-etched part numbers and a specific rubber compound hardness of Shore A 70. Counterfeits often have rough surface finishes.
Q: What torque specification should I use when securing the CAP SCREW near this component?
A: Use 25 Nm for M8 cap screws and 12 Nm for M6 fasteners. Always apply thread locker to prevent loosening from vibration.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
