Overview
The ZF 4616.101.127 TRANSMISSION HOUSING is the structural core of the WG65 series gearbox, serving as the rigid enclosure that supports all internal rotating assemblies and hydraulic circuits. This OEM genuine part, identified by SKU 4616.101.127, precisely aligns the main shaft, countershaft, and planetary gear sets while containing transmission fluid under high pressure. As the primary load-bearing component, it interfaces directly with the 4616105413: OUTPUT shaft assembly and the 4616203017: OUTPUT FLANGE, ensuring torque transfer remains concentric and vibration-free during heavy-duty operation.
Symptoms of Failure
- Persistent oil seepage at mating surfaces — Cracks or porosity in the housing cause fluid to weep around the bell housing or PTO cover, leading to low lubricant levels and eventual gear damage.
- Abnormal gear whine or grinding noise — Distortion of the housing bore allows shafts to misalign, producing metallic contact between gear teeth during load shifts.
- Intermittent clutch slip under load — Warped housing faces prevent proper sealing of valve body passages, reducing hydraulic pressure to clutch packs and causing erratic engagement.
- Visible hairline fractures near bolt bosses — Stress fractures around the 0636011038: HEXAGON SCREW or 0636016015: HEXAGON SCREW mounting points indicate fatigue that can propagate into catastrophic failure.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4616.101.127 |
| Material | High-grade aluminum alloy (A356-T6) |
| Dry Weight | 18.7 kg (41.2 lbs) |
| Overall Length | 485 mm |
| Overall Width | 320 mm |
| Overall Height | 295 mm |
| Bolt Hole Pattern | 8x M12 on 160 mm PCD |
| OEM Reference | ZF WG65 Series |
Compatibility
This housing is engineered specifically for the ZF WG 65 Series transmission family. While the WG65 is the primary application, the same casting geometry is shared across the WG180, WG200, and WG210 models due to identical bell housing bolt patterns and main shaft center distances. Always verify the serial number stamp on your original housing before ordering; the 4616.101.127 variant is not interchangeable with earlier WG50 or later WG80 housings without adapter plates.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from planetary carrier to output flange |
| 4616203017 | OUTPUT FLANGE | Connects driveshaft to transmission output shaft |
| 0636011038 | HEXAGON SCREW | Secures housing to bell housing (M12x1.5×40) |
| 0636016015 | HEXAGON SCREW | Fastens output flange bearing retainer |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals oil gallery between housing and valve body |
| 0732611049 | FILTER INSERT | Traps debris in hydraulic return circuit |
| 0634303718 | O-RING | Seals PTO cover to housing |
| 0636610082 | STUD | Positions clutch housing on transmission face |
| 0636015114 | HEXAGON SCREW | Mounts oil pump to housing interior |
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