Overview
The ZF 4642.303.135 INPUT FLANGE is a precision-engineered component designed for the WG150 and WG160 series transmissions. This OEM genuine part serves as the critical interface between the transmission input shaft and the driveline, transferring rotational torque from the engine to the gearset. Constructed from high-strength alloy steel, the flange ensures a secure, vibration-free connection that maintains alignment under heavy loads. The SKU 4642.303.135 is a direct replacement for worn or damaged flanges, restoring driveline integrity and preventing premature wear on adjacent assemblies such as the TRANSMISSION HOUSING and the TRANSMISSION HOUSING.
Symptoms of Failure
When the ZF 4642.303.135 INPUT FLANGE begins to fail, operators may notice several distinct warning signs. Oil leakage around the input shaft seal is a common early indicator, often caused by flange wobble or surface scoring. Driveline vibration during acceleration suggests the flange splines have worn, creating play between the shaft and flange. Intermittent gear engagement or slipping can occur if the flange’s pilot bore becomes ovalized, misaligning the input shaft. Metallic debris in the transmission fluid may indicate spline wear, which can also damage the GROOVED STUD that secures the assembly.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4642.303.135 |
| Material | Alloy Steel (Heat-Treated) |
| Overall Diameter | 180 mm (7.09 in) |
| Pilot Bore Diameter | 45 mm (1.77 in) |
| Bolt Circle Diameter | 150 mm (5.91 in) |
| Number of Bolt Holes | 8 |
| Spline Count | 24 (Internal) |
| Weight | 2.8 kg (6.17 lbs) |
| OEM Reference | ZF 4642.303.135 |
Compatibility
This input flange is engineered primarily for the ZF WG150 and WG160 series transmissions. It is also compatible with select WG180 and WG200 models that share the same input shaft spline configuration and bolt pattern. Always verify the spline count and pilot bore dimensions against your existing flange before installation. For transmissions requiring a replacement TYPE PLATE, confirm the model code to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and supports internal gear components |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for WG160 series |
| 0730365125 | TYPE PLATE | Identifies transmission model and serial number |
| 0631311009 | GROOVED STUD | Secures flange and housing alignment |
| 4642301168 | SCREEN SHEET | Filters debris from transmission fluid |
| 4642301169 | SCREEN SHEET | Fine-mesh filter for high-flow applications |
| 0636100621 | HEXAGON SCREW | Fastens flange to input shaft |
| 4642301186 | SCREEN SHEET | Coarse-mesh pre-filter for oil pump |
| 4644106324 | SHIFT SYSTEM | Controls gear selection and engagement |
| 4644306598 | PLATE | Covers shift system access port |
Frequently Asked Questions
Q: How do I know if the 4642.303.135 flange is compatible with my transmission?
A: Check the spline count (24 internal splines) and pilot bore diameter (45 mm) on your current flange. The part is designed for WG150 and WG160 series, but also fits some WG180 and WG200 models with matching dimensions.
Q: Can a worn input flange damage other transmission components?
A: Yes. A failing flange can cause misalignment that wears the input shaft seal, damages the GROOVED STUD, and introduces metal particles into the fluid, potentially clogging the SCREEN SHEET filters.
Q: Is this part a direct OEM replacement?
A: Yes, the 4642.303.135 is an OEM genuine ZF part, ensuring exact fitment and material specifications identical to the original factory component.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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