Overview
The ZF 4660.233.008 HELICAL GEAR is a precision-machined component engineered for the auxiliary drive and power take-off (PTO) circuits within the WG 200 and WG 92 series transmissions. This gear transfers rotational torque from the main shaft to the oil pump and peripheral systems, ensuring consistent hydraulic pressure for clutch actuation and lubrication. As an OEM genuine part, SKU 4660.233.008 meets ZF’s exacting tolerances for helix angle, surface hardness, and backlash, directly replacing worn units to restore transmission efficiency. The helical tooth design reduces noise and vibration compared to spur gears, making it critical for smooth operation under load.
Symptoms of Failure
- Erratic shifting or delayed engagement: Worn helical gear teeth cause irregular oil pump speed, leading to inconsistent hydraulic pressure and sluggish gear changes.
- Whining or grinding noise from the transmission housing: As the gear surface degrades, metal-on-metal contact produces a distinct high-pitched whine during acceleration or deceleration.
- Low transmission oil pressure warnings: A failing 4660.233.008 reduces pump output, triggering dashboard alerts or diagnostic trouble codes (DTCs) for insufficient lubrication.
- Visible metal debris in the oil pan: Flaking or chipped gear teeth contaminate the fluid, often found during routine oil changes as fine metallic particles.
Technical Specifications
| Part Number | 4660.233.008 |
| Gear Type | Helical, right-hand spiral |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Module | 2.5 mm |
| Number of Teeth | 23 |
| Helix Angle | 28° |
| Weight | 0.42 kg (0.93 lbs) |
| OEM Reference | ZF 4660.233.008 |
| Surface Hardness | 58–62 HRC |
Compatibility
This helical gear is directly compatible with ZF WG 200 and WG 92 series transmissions, including models WG180, WG200, WG92, and WG120. It is also used in select off-highway and marine auxiliary drives where the same gear geometry is specified. Always verify the part number against your transmission’s serial plate before installation. The gear interfaces with the 4660198001 PERIPHERALS assembly and the 0501209818 RANGE SELECTOR mechanism. For full rebuilds, inspect the 4660101011 TRANSMISSION HOUSING and 4660301018 HOUSING for wear or cracks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Oil pump and valve body assembly for hydraulic control |
| 0501209818 | RANGE SELECTOR | Shift fork and actuator for high/low range engagement |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4660301018 | HOUSING | Rear cover housing for output shaft and seal |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for gear and shaft positioning |
| 0769123894 | TYPE PLATE | Identification plate with transmission serial number |
| 4660221012 | SUCTION TUBE | Oil pickup tube from pan to pump inlet |
| 0634100317 | O-RING | Seal for suction tube and housing joints |
| 0636103273 | CAP SCREW | Fastener for gear retaining plate |
| 0750100022 | SCREW PLUG | Oil drain or fill port plug |
ZF 4660.233.008 HELICAL GEAR – Gear RFQ Support
ZF 4660.233.008 HELICAL GEAR is handled as a gear-train sourcing item for transmission repair teams. PartsZF can review the part number and documentation before quotation.
Part-Number Summary
Use ZF number 4660.233.008 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: GEARBOX
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4660.233.008 |
|---|---|
| Normalized SKU | 4660233008 |
| Part name | HELICAL GEAR |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
Image and Documentation Notes
Current product media status: diagram. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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- ZF 4143.142.022 GEAR SHIFT SENSOR
