ZF 0730.308.102 SNAP RING for WG190/WG210 | OEM Genuine Part

Overview

The ZF 0730.308.102 SNAP RING is a precision-engineered retaining component designed for the WG190 and WG210 series transmissions. This OEM genuine part secures critical internal assemblies within the gear train, preventing axial movement of shafts and gears under high-torque loads. Positioned directly within the planetary gear set or clutch pack stack, the snap ring (SKU: 0730.308.102) ensures that all rotating elements remain properly aligned during operation. Without this component, the transmission’s internal clearances would shift, leading to catastrophic mechanical interference. This snap ring works in conjunction with the 4657101088: TRANSMISSION HOUSING and the 4657201183: HOUS.FRONT SECT to maintain structural integrity throughout the drivetrain.

Symptoms of Failure

• Transmission oil leaks near the bell housing: A worn or broken snap ring allows internal components to shift, damaging seals and causing fluid to escape. This is a common long-tail search query for “ZF WG190 oil leak fix.”
• Gear slipping under load: When the snap ring loses its tension, gears can disengage momentarily, resulting in power loss during acceleration. Technicians often search for “WG210 gear slipping repair” when encountering this symptom.
• Abnormal metallic grinding noises: A fractured snap ring can break into fragments that circulate through the oil, scoring planetary gears and bearings. This generates a distinct grinding sound that worsens over time.
• Hard shifting or delayed engagement: Misalignment caused by a failing snap ring prevents clutch packs from fully engaging, leading to harsh or delayed gear changes.

Technical Specifications

Compatibility

This snap ring is specifically engineered for ZF’s WG and BP series transmissions. It is a direct fit for the WG190 and WG210 models, as well as the BP 210 and BP 230 series. Based on its design and dimensions, it is also compatible with the WG180 and WG200 transmissions where the same internal retaining groove geometry is used. Always verify the groove width in your specific housing, such as the 4657201184: HOUSING REAR PART or the 4657298111: HOUSING REAR SECTION, to confirm fitment before installation.

Related Components

Frequently Asked Questions

Q: Can I reuse the old snap ring if it looks intact?
No. Snap rings lose their spring tension over time due to thermal cycling. Always replace the 0730.308.102 with a new OEM part to prevent sudden failure.

Q: Does this snap ring fit the ZF WG180 transmission?
Yes, the WG180 uses the same internal retaining groove dimensions as the WG190 and WG210. However, always cross-reference your housing part number, such as the 4657101088, to confirm compatibility.

Q: What tools are needed to install this snap ring?
You will need a snap ring pliers set with 90-degree tips and a groove depth gauge. Never use screwdrivers, as they can distort the ring and cause premature failure.