ZF 0734.319.397 SHAFT SEAL for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 0734.319.397 SHAFT SEAL is a critical dynamic sealing component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part prevents pressurized transmission fluid from escaping along rotating shafts, maintaining the hydraulic integrity required for proper clutch engagement and torque converter operation. Installed at the output shaft interface, the seal works in conjunction with the 4143101009 HOUSING and the 4143301025 HOUSING to create a leak-proof barrier. The SKU 0734.319.397 is a direct OEM replacement, ensuring exact fitment and material compatibility with ZF’s original design specifications.

Symptoms of Failure

• Transmission fluid puddles under the bell housing: A worn 0734.319.397 shaft seal allows oil to weep past the rotating shaft, leaving visible drips on the ground after parking.
• Low fluid level warning with no external pan leak: When the shaft seal fails internally, fluid migrates into the torque converter housing, causing a gradual drop in sump level without obvious external wetness.
• Gear engagement delay or harsh shifting: Insufficient hydraulic pressure from fluid loss through the seal leads to sluggish clutch pack application and erratic shift timing.
• Burning oil smell from the transmission area: Escaping fluid contacting hot exhaust or converter surfaces produces a distinct acrid odor, often accompanied by slight smoke.

Technical Specifications

Compatibility

This shaft seal is designed for the ZF WG series of powershift transmissions, specifically the WG100, WG130, and WG131 models. These transmissions are commonly found in industrial forklifts, telehandlers, and construction loaders. The seal also fits select variants of the WG180 and WG200 series when used in the output shaft position. Always verify the housing bore condition and ensure the 0634313603 O-RING and 4475280018 SCREW PLUG are replaced simultaneously to prevent secondary leak paths.

Related Components