Overview
The ZF 4642.309.052 OUTPUT FLANGE is a critical driveline component engineered specifically for the WG 100 series transmission family. This OEM genuine part serves as the mechanical interface between the transmission output shaft and the driveshaft, transferring rotational torque from the gearbox to the vehicle’s differential. Positioned at the rear of the transmission housing, the output flange must maintain precise concentricity and spline engagement to prevent vibration and power loss. The SKU 4642.309.052 is manufactured to ZF’s original specifications, ensuring a direct bolt-on replacement without modification. When paired with a properly sealed TRANSMISSION HOUSING, this flange guarantees leak-free operation under high-load conditions.
Symptoms of Failure
- Transmission fluid seepage at the output shaft: A worn or cracked output flange often causes oil to drip from the rear seal area, leaving visible puddles under the vehicle. This is a common long-tail search query for “ZF WG100 output flange oil leak.”
- Driveline vibration during acceleration: When the flange’s splines wear or the mounting surface distorts, rotational imbalance produces a rhythmic shudder felt through the chassis, especially between 30-50 mph.
- Clunking noise on gear engagement: Excessive play between the flange and output shaft creates a metallic “clunk” when shifting from Park to Drive or Reverse, indicating imminent spline failure.
- Premature bearing or seal wear: A misaligned flange places lateral stress on the output shaft bearing and the adjacent O-RING, accelerating component degradation.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4642.309.052 |
| Material | Forged steel, induction-hardened splines |
| Outer Diameter | 165 mm (approx.) |
| Overall Length | 95 mm (approx.) |
| Spline Count | 32 internal splines |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF 4642.309.052 |
| Sealing Surface | Ground and polished for lip seal |
Compatibility
While the 4642.309.052 is primarily cataloged for the WG 100 series, its design parameters also suit other ZF off-highway transmissions. Compatible models include the WG 180, WG 200, and WG 210 series, provided the output shaft spline count and pilot diameter match. For applications using a HOUSING variant with a different bolt pattern, verify the flange’s six-bolt mounting circle. The flange also interfaces directly with the TRANSMISSION HOUSING on earlier WG models, making it a versatile replacement for fleet maintenance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101004 | TRANSMISSION HOUSING | Encloses gear train and supports output shaft |
| 4651301014 | HOUSING | Rear section housing for clutch pack assembly |
| 0634303928 | O-RING | Seals flange-to-housing joint against fluid loss |
| 4651301008 | TRANSMISSION HOUSING | Alternate housing casting for WG series |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic fluid circuit |
| 4651303005 | SCREEN SHEET | Secondary filtration screen for valve body |
| 0636101032 | CAP SCREW | Fastens flange to output shaft hub |
| 0630361028 | SEALING CAP | Protects output shaft bore during storage |
| 0636304032 | SCREW PLUG | Seals hydraulic test ports on housing |
| 0634303312 | O-RING | Seals plug and cap screw interfaces |
