Overview
The ZF 0730.308.113 SNAP RING is a precision-engineered retaining component designed for the WG190 and WG210 series transmissions. This OEM genuine part secures internal assemblies within the gear train, preventing axial movement of shafts and bearings under high torque loads. The SKU 0730.308.113 is installed directly inside the transmission housing, where it locks components into position to maintain proper gear alignment and clutch pack clearance. Without this snap ring, the entire rotating assembly can shift, leading to catastrophic internal damage.
Symptoms of Failure
- Transmission oil leaks from the housing seam: When the snap ring fatigues or breaks, it allows the TRANSMISSION HOUSING to separate slightly, forcing ATF past seals and gaskets.
- Gear slipping under load in WG210 models: A worn 0730.308.113 cannot hold the clutch drum in place, causing intermittent power loss during acceleration.
- Metallic grinding noises from the bell housing area: Loose internal components contact the HOUS.FRONT SECT or HOUSING REAR PART, producing audible wear indicators.
- Hard shifting between 3rd and 4th gear: Misalignment caused by a failed snap ring alters hydraulic pressure paths, delaying clutch engagement.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.308.113 |
| Material | Spring steel (C67S) with phosphate coating |
| Inner Diameter | 73.0 mm |
| Outer Diameter | 85.5 mm |
| Thickness | 2.5 mm |
| Weight | 12 grams |
| OEM Reference | ZF 0730.308.113 |
| Installation Torque | N/A (press-fit retention) |
Compatibility
This snap ring is engineered for ZF WG180, WG190, WG200, and WG210 series transmissions. It also fits BP 210 and BP 230 series models that share the same planetary gearset architecture. The part is critical when rebuilding the HOUSING REAR SECTION, as it retains the output shaft bearing. Always verify your transmission serial number against ZF parts catalogs before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201183 | HOUS.FRONT SECT | Front section enclosing converter and pump |
| 4657201184 | HOUSING REAR PART | Rear housing supporting output shaft |
| 4657298111 | HOUSING REAR SECTION | Reinforced rear section for heavy-duty use |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for housing-to-bell housing joint |
| 4681301015 | FIXING PLATE | Locks valve body to housing |
| 4681301016 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for pump intake |
| 0636100803 | CAP SCREW | Bolt for rear housing attachment |
Frequently Asked Questions
Q: Can I reuse the 0730.308.113 snap ring during a rebuild?
A: No. This snap ring loses its tension after removal. Always install a new OEM genuine part to prevent premature failure of the WG190 or WG210 transmission.
Q: Does this snap ring fit the ZF BP 230 series?
A: Yes. The 0730.308.113 is compatible with BP 210 and BP 230 models that use the same 73mm internal groove diameter in the housing.
Q: What tools are needed to install this snap ring?
A: Use internal snap ring pliers with 90-degree tips. Ensure the ring seats fully into the groove inside the TRANSMISSION HOUSING before reassembling the gear train.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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