Overview
The ZF 4699.302.172 DRIVE PINION is a critical gear component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part transfers rotational force from the input shaft to the planetary gear sets, directly influencing torque delivery and shift quality. Positioned within the front housing assembly, the drive pinion meshes with the output ring gear to ensure smooth power distribution under heavy loads. The SKU 4699.302.172 is precision-machined to ZF’s exacting tolerances, making it essential for maintaining driveline integrity in commercial vehicles and industrial machinery.
Symptoms of Failure
- Whining or grinding noise during acceleration: Worn gear teeth on the drive pinion produce a distinct metallic sound, often mistaken for bearing failure. This symptom worsens under load and indicates imminent gear slippage.
- Intermittent gear slipping or delayed engagement: As the pinion loses tooth profile, the transmission may hesitate before shifting, particularly between second and third gears. This creates a “soft” shift feel that reduces operator control.
- Metal particles in transmission fluid: Flaking or pitting on the pinion surface sheds debris into the oil system. Contaminated fluid accelerates wear on adjacent components like the 4699101093 HOUSING and 4699301175 HOUSING.
- Vibration through the driveline: A damaged pinion creates rotational imbalance, transmitting shudder through the transmission case and into the chassis at highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.302.172 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Tooth Count | 23 teeth (helical cut) |
| Pitch Diameter | 72.5 mm |
| Overall Length | 98.4 mm |
| Spline Major Diameter | 32.0 mm |
| Weight | 0.85 kg |
| OEM Reference | ZF 4699.302.172 |
| Surface Hardness | 58-62 HRC |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This drive pinion is specifically designed for ZF’s WG-series transmissions, including the WG100, WG130, and WG131 models. It also fits select WG180 and WG200 variants when used with the correct 4699301041 COVER and 0634303936 O-RING. Always verify the spline count and housing bore diameter against your transmission’s serial number before installation. The pinion interfaces directly with the output shaft assembly and requires proper shimming to maintain gear mesh depth.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101093 | HOUSING | Encloses the pinion and planetary gear set |
| 4699301175 | HOUSING | Rear housing supporting output shaft bearings |
| 4699301041 | COVER | Seals the pinion access port |
| 0634303936 | O-RING | Prevents fluid leakage at housing joints |
| 0630513203 | SNAP RING | Retains pinion bearing on shaft |
| 0750110302 | SHAFT SEAL | Dynamic seal for pinion shaft exit |
| 0630513073 | SNAP RING | Secures outer bearing race in housing |
| 0501319149 | SCREW PLUG | Closes oil gallery access hole |
| 0636302022 | SCREW PLUG | Seals pressure test port |
| 0634801038 | SEALING RING | Copper gasket for plug threads |
ZF 4699.302.172 DRIVE PINION – Gear RFQ Support
Use ZF 4699.302.172 DRIVE PINION as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 4699.302.172 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 | 4699.302.172 |
|---|---|
| Normalized SKU | 4699302172 |
| 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.
Related Parts
- ZF 4661.302.010 GEAR
- ZF 2094.306.024 GEAR SHIFT RAIL
- ZF 4642.353.026 SPUR GEAR
- ZF 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
