Overview
The ZF 4616.101.106 TRANSMISSION HOUSING is the structural core of the WG65 series transmission, serving as the rigid enclosure that supports all internal rotating assemblies, gear trains, and hydraulic components. This OEM genuine part, identified by SKU 4616.101.106, precisely aligns the input shaft, output shaft, and planetary gear sets while containing the transmission fluid under high pressure. As a cast component, it provides the mounting points for the valve body, torque converter housing, and bell housing, making it indispensable for maintaining driveline integrity in heavy-duty commercial vehicles.
Symptoms of Failure
- External oil seepage at mating surfaces – Cracks or porosity in the housing cause fluid to weep around the bell housing or rear seal area, leading to low transmission fluid levels and eventual overheating.
- Abnormal gear engagement noise – Warping or distortion of the housing bore shifts bearing alignment, producing a distinct whining or grinding sound during gear changes under load.
- Intermittent gear slipping under torque – A compromised housing can allow the valve body to shift position, resulting in delayed or incomplete clutch pack engagement, particularly in lower gears.
- Visible hairline fractures near bolt bosses – Stress cracks around the 0636011038: HEXAGON SCREW or 0636011118: HEXAGON SCREW mounting points indicate fatigue failure, risking sudden housing separation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.101.106 |
| Material | High-strength aluminum alloy (A356-T6) |
| Weight | 18.4 kg (40.6 lbs) |
| Overall Length | 485 mm |
| Overall Width | 320 mm |
| Overall Height | 275 mm |
| Bolt Hole Pattern | 8 x M12 on 160 mm PCD |
| OEM Reference | ZF 4616.101.106 |
| Fluid Capacity (internal) | 2.8 liters |
Compatibility
This housing is engineered exclusively for the ZF WG65 transmission series, which includes models such as WG65, WG80, and WG90 used in municipal trucks, refuse vehicles, and medium-duty buses. While the WG65 is the primary application, the 4616.101.106 housing also fits select WG120 variants with adapter plates. It does not interchange with WG180 or WG200 series housings due to different bell housing bolt patterns and main shaft center distances. Always verify the casting number on your original housing before ordering.
During installation, the housing must be secured using 0636016015: HEXAGON SCREW for the main bearing caps and 0631306085: CYLINDRICAL PIN for precise dowel alignment. Proper torque sequencing prevents distortion and ensures long service life.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636011038 | HEXAGON SCREW | Secures bell housing to transmission case |
| 0636011118 | HEXAGON SCREW | Fastens valve body mounting bracket |
| 0636016015 | HEXAGON SCREW | Clamps bearing cap to housing |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals oil pump to housing interface |
| 0636304019 | SCREW PLUG | Closes fill and drain ports |
| 0634801152 | SEALING RING | Prevents fluid loss at plug threads |
| 0732611049 | FILTER INSERT | Traps debris in hydraulic circuit |
| 0634303718 | O-RING | Seals filter housing to case |
| 0636015114 | HEXAGON SCREW | Attaches oil pan to housing |
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