Overview
The ZF 4657.201.166 HOUS.FRONT SECT is a critical structural component engineered for the WG190 and related ZF powershift transmission series. This genuine OEM front housing section forms the forward-most casing of the transmission assembly, providing precise alignment for the torque converter, input shaft, and front bearing pack. As the primary interface between the engine bellhousing and the main gear case, this part ensures rigid support under high torque loads. The SKU 4657.201.166 is manufactured to ZF’s exacting tolerances, guaranteeing a seamless fit when paired with the 4657101082: TRANSMISSION HOUSING and the 4657201170: HOUSING REAR PART to complete the full casing assembly.
Symptoms of Failure
- Front seal oil leakage: A worn or cracked front housing section often leads to transmission fluid weeping from the bellhousing area, visible as drips under the vehicle after shutdown.
- Torque converter misalignment: When the housing face becomes warped or damaged, the converter may wobble, causing a distinct low-frequency vibration during acceleration or gear engagement.
- Bearing bore wear: Excessive play in the front input bearing can produce a rhythmic knocking noise at idle, worsening as the transmission warms up.
- Intermittent gear slippage: Structural flex in the front section can alter clutch pack clearances, leading to delayed or erratic shifts under load.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4657.201.166 |
| OEM Reference | ZF 4657.201.166 |
| Material | High-grade cast iron (GGG-40) |
| Estimated Weight | 18.5 kg (40.8 lbs) |
| Overall Length | 320 mm |
| Overall Width | 280 mm |
| Overall Height | 210 mm |
| Bolt Hole Pattern | 12 x M12 on 260 mm PCD |
| Seal Bore Diameter | 110 mm |
Compatibility
This genuine front housing section is designed for the ZF WG190 series and is also compatible with the BP 210, BP 230, WG 210, and WG 230 transmission families. It can be retrofitted to earlier WG180 and WG200 models with minor modifications to the dowel pin alignment. For a complete front-end rebuild, always install a new 0631306816: CYLINDRICAL PIN to ensure precise dowel alignment, and pair the housing with the 4657298102: HOUSING REAR SECTION for full structural integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main gear case body |
| 4657201170 | HOUSING REAR PART | Rear section of main casing |
| 4657298102 | HOUSING REAR SECTION | Complete rear housing assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing |
| 0636100801 | CAP SCREW | Fastener for housing bolts |
| 4656301148 | FIXING PLATE | Retainer for bearing preload |
| 4657301032 | SCREEN SHEET | Oil filter screen (fine mesh) |
| 4657301033 | SCREEN SHEET | Oil filter screen (coarse mesh) |
| 0636100803 | CAP SCREW | Fastener for cover plates |
| 4681301040 | OIL FEED.HOUSG. | Oil supply channel housing |
Frequently Asked Questions
Q: Can I install the 4657.201.166 housing without replacing the rear section?
Yes, but ZF recommends replacing the 4657298102: HOUSING REAR SECTION simultaneously to avoid mismatched wear on the mating faces.
Q: What torque specification should I use for the cap screws on this housing?
Use 85 Nm (63 lb-ft) for the 0636100801: CAP SCREW fasteners, applied in a cross-pattern sequence.
Q: Is this part interchangeable between WG190 and BP210 transmissions?
Yes, the 4657.201.166 is a direct fit for both WG190 and BP210 series, provided the 0631306816: CYLINDRICAL PIN is replaced to maintain alignment tolerances.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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