Overview
The ZF 2094.306.039 GEAR SHIFT RAIL is a precision-machined component engineered for the WG100, WG130, and WG131 heavy-duty transmission series. This OEM genuine part functions as the primary linear actuator within the shift mechanism, translating driver input into precise gear engagement by guiding the shift forks along the main shaft assembly. The SKU 2094.306.039 sits directly within the upper housing of the transmission, interfacing with the SHIFT SYSTEM to ensure smooth, positive gear changes under high-torque conditions. Its hardened steel construction resists bending and wear, maintaining critical alignment for the MAIN SHAFT and MAIN SHAFT assemblies during prolonged operation.
Symptoms of Failure
- Hard shifting or gear clash: A worn shift rail causes binding in the shift gate, making it difficult to engage gears without grinding. This is a common symptom when the rail surface becomes pitted or scored.
- Transmission jumping out of gear: If the rail’s detent grooves wear unevenly, the shift fork cannot hold position, causing the transmission to slip out of gear under load—especially in 4th or 5th gear.
- Excessive oil leaks around shift tower: A bent or cracked shift rail can damage the shift housing seal, leading to visible transmission fluid seepage near the shift lever base.
- Loose or sloppy shift lever feel: When the rail’s bushing surface wears, lateral play develops in the shift lever, reducing shift precision and increasing driver fatigue.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 2094.306.039 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 385 mm |
| Rail Diameter | 22 mm |
| Detent Groove Depth | 3.2 mm |
| Weight | 1.45 kg |
| Surface Hardness | 58-62 HRC |
| OEM Reference | ZF 2094.306.039 |
| Thread Type | M10 x 1.5 (shift fork attachment) |
Compatibility
This genuine ZF shift rail is specifically designed for the WG100, WG130, and WG131 transmission families. It is also compatible with select variants of the WG180 and WG200 series when used in conjunction with the correct GEARSHIFT SHAFT and shift fork assemblies. For WG200 applications, verify that the shift housing matches the rail’s detent spacing. The rail integrates directly with the SHIFT SYSTEM and requires proper alignment with the MAIN SHAFT and MAIN SHAFT assemblies to function correctly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | MAIN SHAFT | Transfers torque from input to output; mates with shift rail via fork |
| 2094304054 | MAIN SHAFT | Alternate main shaft variant for WG130/WG131 applications |
| 2094106010 | SHIFT SYSTEM | Complete shift mechanism including rail, forks, and detent springs |
| 2094206001 | GEARSHIFT SHAFT | Rotary input shaft that actuates the shift rail |
| 2094306053 | GEARSHIFT SHAFT | Alternate gearshift shaft for WG180/WG200 series |
| 0630513070 | SNAP RING | Retains shift rail in housing; prevents axial movement |
| 2094306019 | WASHER | Thrust washer for shift rail end play adjustment |
| 0732040444 | COMPRESSION SPRING | Detent spring for shift rail positioning |
| 0732040728 | COMPRESSION SPRING | Heavy-duty detent spring for high-vibration applications |
| 2093206001 | BUSH | Guide bushing for shift rail; reduces friction wear |
Frequently Asked Questions
Q: Can I use the ZF 2094.306.039 shift rail in a WG180 transmission?
A: Yes, but only if the shift housing and detent spring configuration match. You will also need to verify compatibility with the GEARSHIFT SHAFT and the GEARSHIFT SHAFT assembly for proper engagement.
Q: What is the typical lifespan of this shift rail?
A: Under normal operating conditions with proper lubrication, the rail lasts 500,000 to 800,000 km. Wear accelerates if the BUSH or SNAP RING fails, allowing metal-on-metal contact.
Q: Do I need to replace the compression springs when installing a new shift rail?
A: It is strongly recommended. The COMPRESSION SPRING and COMPRESSION SPRING lose tension over time, which can cause premature detent groove wear on the new rail.
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ZF 2094.306.039 GEAR SHIFT RAIL – Gear RFQ Support
Use ZF 2094.306.039 GEAR SHIFT RAIL as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 2094.306.039 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: SHIFT SYSTEM
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 | 2094.306.039 |
|---|---|
| Normalized SKU | 2094306039 |
| Part name | GEAR SHIFT RAIL |
| 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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