Overview
The ZF 4166.335.299 TURBINE WHEEL is a critical rotating component within the torque converter assembly of select ZF heavy-duty transmissions. It serves as the primary driven element that receives hydraulic energy from the impeller, converting fluid flow into mechanical torque to drive the transmission input shaft. This OEM genuine part, identified by SKU 4166.335.299, is precision-balanced to ensure smooth power transfer and minimal vibration during high-load operations. The turbine wheel sits directly behind the stator and is splined to the input shaft, making it essential for initial vehicle launch and low-speed torque multiplication. When paired with a properly sealed TRANSMISSION HOUSING, this component maintains optimal hydraulic circuit integrity.
Symptoms of Failure
- Delayed or harsh engagement: A worn turbine wheel can cause noticeable lag when shifting from neutral to drive, often accompanied by a shudder during acceleration.
- Transmission overheating: Damaged turbine blades reduce hydraulic efficiency, generating excess heat that may trigger warning lights or fluid discoloration.
- Loss of low-end torque: If the turbine wheel fails to capture fluid energy properly, operators experience poor pulling power from a standstill, especially on inclines.
- Unusual whining or grinding noises: Metal fatigue or blade deformation produces audible high-pitched sounds from the bell housing area during gear engagement.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4166.335.299 |
| OEM Reference | ZF 4166.335.299 |
| Material | High-strength aluminum alloy with hardened steel hub insert |
| Outer Diameter | ~340 mm (estimated) |
| Hub Spline Count | 27-tooth involute spline |
| Weight | ~4.2 kg (9.3 lbs) |
| Balancing Grade | G6.3 per ISO 1940 |
| Max Operating Temperature | 120°C (248°F) continuous |
Compatibility
This turbine wheel is engineered for ZF WG-series powershift transmissions, specifically the WG150, WG180, WG200, and WG201 models. These units are commonly found in construction equipment, material handlers, and agricultural machinery requiring robust torque converter performance. The 4166.335.299 interfaces directly with the TRANSMISSION HOUSING and is secured using a GROOVED STUD for precise axial retention. Always verify the TYPE PLATE on your transmission to confirm model variant before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Encloses gear train and supports torque converter assembly |
| 4642301207 | TRANSMISSION HOUSING | Alternate housing variant for WG180/WG200 series |
| 0730365067 | TYPE PLATE | Identification plate with model and serial number |
| 0631311009 | GROOVED STUD | Locating pin for turbine hub alignment |
| 4642301168 | SCREEN SHEET | Filter mesh for torque converter circuit |
| 4642301169 | SCREEN SHEET | Fine filtration screen for hydraulic oil |
| 0636100621 | HEXAGON SCREW | Fastener for housing cover attachment |
| 4642301186 | SCREEN SHEET | Secondary filter element for debris protection |
| 4644106300 | SHIFT SYSTEM | Hydraulic control valve assembly for gear selection |
| 4644306500 | COVER PLATE | Access cover for torque converter inspection |
