ZF 4651.221.014 TUBE for WG100 | OEM Genuine Part

Overview

The ZF 4651.221.014 TUBE is a precision-engineered fluid conduit designed exclusively for the WG 100 series transmission family. This OEM genuine part, identified by SKU 4651.221.014, serves as a critical hydraulic passage within the transmission’s valve body assembly, directing pressurized oil to the clutch packs and torque converter. Its robust construction ensures consistent flow under high thermal and pressure loads, directly influencing shift quality and overall driveline efficiency. When paired with the TRANSMISSION HOUSING (4651101007), this tube forms a sealed circuit that prevents cross-contamination between hydraulic circuits.

Symptoms of Failure

• Hydraulic fluid seepage at the tube junction: A worn or cracked 4651.221.014 tube often causes visible oil drips near the valve body, leading to low fluid levels and erratic shifting.
• Delayed gear engagement under load: When the tube loses internal integrity, pressure drops occur, resulting in a noticeable lag when shifting from Neutral to Drive or Reverse.
• Erratic clutch modulation: A compromised tube can cause intermittent clutch slip, particularly during upshifts, as the oil supply becomes inconsistent.
• Overheating transmission fluid: Restricted flow through a damaged tube reduces cooling capacity, causing the transmission to run hotter than normal.

Technical Specifications

Compatibility

This tube is engineered for the ZF WG 100 series, including the WG120, WG150, WG180, and WG200 models. It is also compatible with select variants of the WG 90 and WG 250 where the valve body layout matches the WG100 architecture. For proper installation, ensure the mating HOUSING (4651301029) and HOUSING (4651301024) are free of debris and corrosion.

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