Overview
The ZF 4699.302.185 DRIVE PINION is a critical gear component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transfers rotational force from the input shaft to the planetary gearset, directly influencing torque delivery and shift quality. Positioned within the front housing assembly, the drive pinion meshes with the countershaft to ensure smooth power flow under heavy loads. The SKU 4699.302.185 is precision-machined to ZF’s original tolerances, guaranteeing a direct fit without modification. When replacing this pinion, always inspect the adjacent 4699101086 HOUSING and 4699301223 HOUSING for wear, as these components share the same lubrication circuit and bearing surfaces.
Symptoms of Failure
- Whining or grinding noise during acceleration: A worn drive pinion produces a distinct high-pitched whine that intensifies under load, often mistaken for bearing failure. This is a classic sign of gear tooth pitting or surface fatigue.
- Delayed or harsh gear engagement: As the pinion’s teeth lose their profile, the transmission may hesitate before engaging forward or reverse gears, followed by a jarring shift. This symptom frequently leads technicians to search for “ZF WG100 hard shift causes.”
- Metal particles in transmission fluid: Flakes or silver dust on the drain plug indicate the drive pinion is shedding material. If ignored, debris can clog the valve body and damage the 0636302022 SCREW PLUG sealing points.
- Vibration at specific RPM ranges: A chipped or unbalanced pinion creates rhythmic vibrations felt through the chassis, particularly between 1500-2500 RPM. This symptom often accompanies failure of the 0501319149 SCREW PLUG due to increased housing flex.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.302.185 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Tooth Count | 17 teeth (estimated) |
| Pitch Diameter | 45.2 mm |
| Overall Length | 112.5 mm |
| Spline Diameter | 28 mm (internal spline) |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4699.302.185 |
| Surface Hardness | 58-62 HRC |
Compatibility
This drive pinion is specifically designed for ZF’s WG-series powershift transmissions. Verified fitment includes the WG100, WG130, and WG131 models. It may also be compatible with the WG180 and WG200 series when used in conjunction with the correct 4699301222 COVER and 0501323165 SHAFT SEAL. Always cross-reference your transmission’s serial number before ordering. The pinion interfaces directly with the 0634801038 SEALING RING and 0634303996 O-RING to prevent oil bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101086 | HOUSING | Encloses the drive pinion and supports bearing preload |
| 4699301223 | HOUSING | Rear housing section aligning the output shaft |
| 0636302022 | SCREW PLUG | Seals the oil gallery adjacent to the pinion shaft |
| 0501319149 | SCREW PLUG | Magnetic drain plug for ferrous debris collection |
| 0634801038 | SEALING RING | Prevents fluid leakage at the pinion bore interface |
| 0730365801 | TYPE PLATE | Identification tag for transmission model verification |
| 0501323165 | SHAFT SEAL | Dynamic seal for the pinion output shaft |
| 4699301222 | COVER | Protective cover over the pinion access port |
| 0634303996 | O-RING | Static seal between housing and cover |
| 0630513060 | SNAP RING | Retains the pinion bearing in its housing bore |
ZF 4699.302.185 DRIVE PINION – Gear RFQ Support
ZF 4699.302.185 DRIVE PINION 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 4699.302.185 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: INPUT
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 | 4699.302.185 |
|---|---|
| Normalized SKU | 4699302185 |
| Part name | DRIVE PINION |
| 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: fallback. 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 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
