Overview
The ZF 4657.102.012 INPUT for WG190/WG210 is a critical OEM genuine component that serves as the primary power intake interface within the transmission assembly. Positioned directly between the torque converter and the main gear set, this input shaft transfers rotational force from the engine to the planetary gears. The SKU 4657.102.012 is precision-machined to exact ZF tolerances, ensuring seamless engagement with the TRANSMISSION HOUSING and the HOUS.FRONT SECT for optimal alignment. Without this part, the transmission cannot initiate gear engagement, making it a cornerstone of drivetrain reliability.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 4657.102.012 input shaft causes noticeable hesitation when shifting from neutral to drive or reverse, often accompanied by a clunking noise.
- Transmission fluid leaks near the bell housing: Deterioration of the input shaft seal surface leads to oil seepage, visible as drips under the vehicle or on the HOUSING REAR PART.
- Vibration during acceleration: Excessive play in the input shaft causes driveline shudder, particularly under load between 20-40 mph.
- Intermittent gear slipping: As the input splines wear, the transmission may momentarily lose power transfer, triggering fault codes for ratio errors.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.102.012 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Overall Length | 312 mm |
| Spline Diameter | 38 mm (input end) |
| Weight | 4.2 kg |
| OEM Reference | ZF 4657.102.012 (Genuine) |
| Torque Capacity | 1,200 Nm (max) |
| Hardness | 58-62 HRC (surface) |
Compatibility
This input shaft is engineered for ZF WG series transmissions, specifically the WG190 and WG210 models. It also fits the WG180 and WG200 variants when used with the correct CYLINDRICAL PIN for alignment. The part is not compatible with older WG120 or WG150 series without housing modifications. Always verify the spline count matches your transmission’s TRANSMISSION HOUSING bore diameter before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Encloses and supports all internal gear components |
| 4657201027 | HOUS.FRONT SECT | Front section housing for input shaft bearing support |
| 4657201020 | HOUSING REAR PART | Rear housing section for output shaft alignment |
| 0631306792 | CYLINDRICAL PIN | Precision alignment pin for housing-to-shaft positioning |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Locks input shaft axial position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump protection |
| 0636100803 | CAP SCREW | High-torque fastener for bearing retainer |
| 4681301040 | OIL FEED.HOUSG. | Directs pressurized oil to input shaft bearings |
Frequently Asked Questions
Q: Can the 4657.102.012 input shaft be reused after removal?
A: No. ZF recommends replacing this part with a new OEM unit whenever the transmission is disassembled, as the splines and bearing surfaces wear microscopically during operation.
Q: Does this input shaft require a specific torque sequence?
A: Yes. When installing, torque the CAP SCREW to 85 Nm in a cross-pattern, then apply 120 Nm final torque. Always use a new CYLINDRICAL PIN for alignment.
Q: How do I verify this part fits my WG210 transmission?
A: Check the serial number on your TRANSMISSION HOUSING casting. If it ends with “WG210-XX,” this input shaft is compatible. For WG190 units, confirm the spline count matches 28 teeth.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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