ZF 4168.034.129 CONVERTER Torque Converter Assembly | Complete Unit

Overview

The ZF 4168.034.129 CONVERTER Torque Converter Assembly is a complete, drop-in replacement unit engineered for heavy-duty ZF powershift transmissions. This critical component sits between the engine flywheel and the transmission input shaft, using hydraulic fluid to multiply engine torque and provide smooth power delivery under load. The SKU 4168.034.129 is a direct OEM-grade assembly that replaces worn or damaged converters in BP 210, WG 190, and WG 210 series gearboxes. When installed alongside a robust TRANSMISSION HOUSING, this converter ensures optimal lock-up performance and minimal heat generation during operation.

Symptoms of Failure

• Torque converter shudder or vibration during acceleration: A failing 4168.034.129 often produces a noticeable shudder when the converter clutch engages, especially under moderate load in WG 190 series transmissions.
• Transmission fluid overheating and darkening: Worn internal stator bearings cause excessive slippage, leading to fluid temperatures exceeding 120°C and a burnt smell from the dipstick.
• Delayed or harsh engagement when shifting from neutral to drive: A degraded converter fails to build hydraulic pressure quickly, resulting in a 2-3 second lag before the vehicle moves.
• Audible rattling or grinding noises from the bell housing: Loose or broken damper springs inside the converter assembly create metallic sounds that intensify at idle.

Technical Specifications

Compatibility

This torque converter assembly is designed for ZF powershift transmissions in the BP and WG series. It directly replaces units in the BP 210, WG 190, and WG 210 series. It is also compatible with WG 180 and WG 200 models when used with the correct HOUS.FRONT SECT adapter. For rear-mounted applications, pairing with a HOUSING REAR PART ensures proper alignment. Always verify the pilot bore diameter and install a new CYLINDRICAL PIN during reassembly to prevent drive plate misalignment.

Related Components

Frequently Asked Questions

Q: Can the 4168.034.129 be rebuilt, or must it be replaced as a complete unit?
A: This assembly is a sealed, welded unit. ZF does not recommend field rebuilding due to precision balancing requirements. Always replace with a complete assembly to avoid internal leakage and vibration issues.

Q: What transmission fluid is recommended for this torque converter?
A: Use ZF TE-ML 03 or 05 approved fluids (e.g., ZF LifeguardFluid 5 or equivalent Dexron III). Never mix fluids; the converter holds approximately 1.8 liters of fluid separate from the main sump.

Q: How do I verify if my WG 190 transmission uses this specific converter?
A: Check the bell housing casting number. If it matches BP 210 or WG 210 series dimensions (340 mm diameter), the 4168.034.129 is the correct unit. Always measure the pilot bore depth before ordering.