Overview
This OEM genuine ZF 2093.304.078 GEAR is a critical power transmission component engineered for the WG100, WG130, and WG131 series transmissions. Positioned within the differential assembly, this gear directly engages with the axle bevel gear to transfer rotational force from the driveshaft to the wheels. The SKU 2093.304.078 ensures precise tooth geometry and hardened steel construction, maintaining optimal torque distribution and reducing drivetrain noise. When installed alongside a DIFFERENTIAL HOUSING, this gear forms the core of the final drive unit, converting high-speed input into usable wheel torque.
Symptoms of Failure
- Whining or howling noise during acceleration: Worn gear teeth on the 2093.304.078 produce a distinct high-pitched whine that intensifies under load, indicating uneven tooth contact or pitting.
- Intermittent gear slipping under heavy load: When the gear surface becomes polished or chipped, the transmission may momentarily lose drive engagement, particularly during uphill climbs or towing.
- Metallic debris in transmission fluid: Flakes or silver particles in the oil filter or drain plug signal advanced wear of the gear teeth, often accompanied by a grinding sensation during turns.
- Excessive backlash in the driveline: A clunking sound when shifting between drive and reverse indicates increased clearance between this gear and the mating AXLE BEVEL GEAR.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 2093.304.078 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Tooth Count | 37 (estimated for WG100 series) |
| Outside Diameter | 178 mm (7.0 in) |
| Weight | 2.4 kg (5.3 lbs) |
| OEM Reference | ZF 2093.304.078 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
Compatibility
This gear is specifically designed for ZF WG100, WG130, and WG131 series transmissions. It also fits select variants of the WG180 and WG200 models when used with the correct DIFFERENTIAL assembly. For WG200 applications, verify the tooth count matches your existing DIFFERENTIAL unit. Always pair this gear with a new TAPER ROLLER BEARING to ensure proper preload and alignment during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between left and right wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports gear shaft radial and axial loads |
| 2093209023 | DIFFERENTIAL | Alternative differential unit for WG180 models |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and supports gear and bearing assembly |
| 0631329088 | SPRING PIN | Secures gear to shaft alignment |
| 5838300811 | THRUST WASHER | Controls axial clearance in gear stack |
| 5838300721 | AXLE BEVEL GEAR | Mates directly with 2093.304.078 gear |
| 5838300633 | AXLE | Transmits rotation from differential to wheels |
| 5838300753 | THRUST WASHER | Reduces friction between gear and housing |
| 5838300818 | THRUST WASHER | Secondary axial load distribution washer |
Frequently Asked Questions
Q: Can I replace just the 2093.304.078 gear without replacing the mating bevel gear?
A: It is strongly recommended to replace both gears as a matched set. Worn teeth on one gear will accelerate wear on the new gear, leading to premature failure and increased backlash.
Q: What torque specification should I use for the gear retaining nut?
A: For WG100 series transmissions, the retaining nut should be torqued to 250 Nm (184 ft-lbs) with thread locker applied. Always consult your ZF service manual for exact values.
Q: How do I identify if my transmission uses this specific gear?
A: Check the transmission serial number plate. WG100, WG130, and WG131 models with a 37-tooth final drive ratio typically use the 2093.304.078 gear. Measure the gear diameter to confirm compatibility.
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ZF 2093.304.078 GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 2093.304.078 GEAR with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This gear page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 2093.304.078 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: MAIN SHAFT
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 | 2093.304.078 |
|---|---|
| Normalized SKU | 2093304078 |
| Part name | GEAR |
| Product category | gear |
| Cross-reference support | Available for RFQ review |
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.
Related Parts
- ZF 4646.302.128 HELICAL GEAR
- ZF 4143.316.088 PINION
- ZF 4657.302.007 INPUT GEAR
- ZF 4657.354.044 OUTPUT GEAR
- ZF 4644.306.326 GEAR SHIFT HOUSING
