ZF 0734.401.298 R-RING for WG200/WG92/WG98 | OEM Genuine Part

Overview

The ZF 0734.401.298 R-RING is a critical sealing component engineered for the high-pressure hydraulic circuits within ZF WG200, WG92, and WG98 series transmissions. This OEM genuine part, identified by SKU 0734.401.298, sits between the rotating clutch drum and the stationary housing, preventing pressurized transmission fluid from bypassing the piston. By maintaining a precise seal under extreme thermal and mechanical loads, this ring ensures consistent clutch engagement and disengagement. When paired with a properly sealed TRANSMISSION HOUSING, the R-RING guarantees that hydraulic pressure is directed exactly where it is needed for smooth gear transitions.

Symptoms of Failure

• External oil seepage near the clutch housing: A worn 0734.401.298 R-RING allows ATF to escape past the drum, leaving visible drips on the bell housing or under the vehicle.
• Delayed or harsh gear engagement: When the ring loses its sealing integrity, hydraulic pressure drops, causing a noticeable lag when shifting from Neutral to Drive or Reverse.
• Intermittent gear slipping under load: As the seal fails, the clutch pack cannot hold full torque, leading to RPM flare without corresponding acceleration, especially on inclines.
• Erratic shift timing in the WG200 series: A compromised R-RING disrupts the balance between the RANGE SELECTOR valve and the clutch piston, resulting in unpredictable shift points.

Technical Specifications

Compatibility

This genuine ZF R-RING is specifically designed for the following transmission models: WG180, WG200, WG92, WG94, and WG98 series. It is a direct replacement for the original sealing ring in the clutch drum assembly. The part is also compatible with the HOUSING unit used in later WG200 variants. For optimal performance, always replace this ring when servicing the PERIPHERALS kit or the clutch piston assembly.

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