Overview
The ZF 5838.300.149 PINION SHAFT is a critical component within the WG100, WG130, and WG131 transmission assemblies. This OEM genuine part serves as the primary input gear that transfers rotational force from the drive shaft into the differential unit. Machined from high-grade alloy steel, the pinion shaft interfaces directly with the ring gear to establish the final drive ratio. The SKU 5838.300.149 is engineered to ZF’s exacting tolerances, ensuring minimal backlash and optimal power delivery under heavy industrial loads. It sits at the heart of the axle assembly, working in concert with the 5838022003: REAR AXLE and the 5838109001: DIFFERENTIAL to distribute torque evenly to the wheels.
Symptoms of Failure
- Whining or howling noise during acceleration: When the pinion shaft’s gear teeth wear unevenly, a distinct high-pitched whine becomes audible, especially when decelerating or turning. This indicates surface fatigue on the pinion gear.
- Excessive driveline lash or clunking: A worn pinion shaft creates excessive play between the pinion and ring gear, producing a noticeable clunk when shifting between drive and reverse. This symptom often accompanies a failing 0750117075: TAPER ROLLER BEARING.
- Oil seepage from the pinion seal area: As the shaft’s bearing surface degrades, it compromises the pinion seal, leading to gear oil leaks. Look for drips near the front of the differential housing.
- Vibration at highway speeds: A bent or unbalanced pinion shaft causes rhythmic vibrations that intensify with speed, often misdiagnosed as tire imbalance.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 5838.300.149 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 245 mm (estimated) |
| Spline Diameter | 32 mm (estimated) |
| Weight | 3.8 kg (estimated) |
| OEM Reference | ZF 5838.300.149 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
Compatibility
This pinion shaft is specifically designed for ZF’s WG-series industrial transmissions. Based on its part number and gear geometry, the 5838.300.149 is compatible with the following models: WG100, WG130, and WG131. It may also fit select variants of the WG180 and WG200 series when used with the correct 5838300128: DIFFERENTIAL HOUSING. Always verify spline count and bearing preload specifications before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838022003 | REAR AXLE | Houses the final drive assembly |
| 5838109001 | DIFFERENTIAL | Distributes torque between wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports pinion shaft radial/axial loads |
| 5838300128 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 0631329086 | SPRING PIN | Secures pinion shaft alignment |
| 5838300129 | THRUST WASHER | Controls axial clearance |
| 5838300130 | THRUST WASHER | Controls axial clearance (alternate thickness) |
| 5838300131 | AXLE BEVEL GEAR | Meshes with pinion shaft |
| 5838300132 | COMPENS. STUB AXLE | Compensates for axle length variations |
| 5838300133 | COMPENS. STUB AXLE | Compensates for axle length variations (alternate) |
ZF 5838.300.149 PINION SHAFT – Shaft RFQ Support
PartsZF supports RFQ preparation for ZF 5838.300.149 PINION SHAFT where shaft identification and documentation review are required before ordering.
Part-Number Summary
Use ZF number 5838.300.149 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
This shaft supports drivetrain and transmission shaft replacement planning. Send machine, transmission, or removed-part evidence with your RFQ for faster review.
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 | 5838.300.149 |
|---|---|
| Normalized SKU | 5838300149 |
| Part name | PINION SHAFT |
| Product category | shaft |
| 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 2094.110.011 P.T.O. SHAFT
- ZF 2094.110.014 P.T.O. SHAFT
- ZF 4642.303.002 OUTPUT SHAFT
- ZF 2093.110.011 P.T.O. SHAFT
- ZF 5838.300.106 INPUT SHAFT
