ZF 4651.199.039 LOOSE PARTS for WG100 | OEM Genuine Part

Overview

The ZF 4651.199.039 LOOSE PARTS assembly is a critical service kit designed specifically for the WG 100 series transmission. This genuine OEM part number 4651.199.039 contains the necessary loose components required to rebuild or service the valve body and hydraulic control unit within the transmission. It ensures proper sealing and pressure regulation, directly impacting shift quality and clutch engagement. When installed alongside the 4651101007: TRANSMISSION HOUSING and the 4651301029: HOUSING, this kit restores the internal integrity of the hydraulic circuit.

Symptoms of Failure

When the ZF 4651.199.039 LOOSE PARTS begin to degrade, operators often notice specific operational issues. Look for these failure symptoms to diagnose a worn kit:

• Erratic shift timing or harsh engagement: Worn internal seals cause pressure loss, leading to delayed or jarring gear changes.
• Internal hydraulic oil leaks: Degraded O-rings and gaskets within the kit allow transmission fluid to bypass, resulting in low line pressure.
• Transmission slipping under load: Inadequate clamping force on clutches due to pressure loss from worn loose parts causes power loss during acceleration.
• Contaminated fluid from debris: Deteriorating rubber components can shed particles, clogging the 4651203002: SCREEN SHEET or the 4651303005: SCREEN SHEET.

Technical Specifications

Compatibility

This genuine ZF 4651.199.039 LOOSE PARTS kit is engineered for the WG 100 series transmission family. While primarily designed for the WG100, it is also compatible with the WG120, WG150, and WG180 models due to shared valve body architecture. Always verify the internal housing configuration against the 4651301024: HOUSING and the 0634303928: O-RING to ensure a proper seal during installation.

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