Overview
The ZF 4616.101.401 TRANSMISSION HOUSING is the primary structural casing for the WG 65 series gearbox. This OEM genuine part encloses the planetary gear sets, clutch packs, and valve body, providing the rigid foundation required to withstand high torque loads in heavy-duty industrial applications. As the central component of the assembly, the housing (SKU: 4616.101.401) ensures precise alignment of all rotating elements and maintains internal hydraulic pressure. It is machined from high-strength cast iron to resist distortion under thermal and mechanical stress, and it interfaces directly with the torque converter housing and output flange.
Symptoms of Failure
- External oil leaks at mating surfaces: A cracked or warped housing often causes transmission fluid to seep from the bell housing or rear seal area, leading to low fluid levels and eventual gearbox overheating.
- Gear slipping or delayed engagement: When the housing loses dimensional stability, internal shaft alignment shifts, causing clutch packs to slip under load and producing erratic shift patterns.
- Unusual metallic grinding noises: Fractures in the housing allow planetary gears to contact the casing wall, generating a distinct grinding sound during acceleration or deceleration.
- Vibration through the driveline: A distorted housing creates bearing bore misalignment, transmitting excessive vibration to the vehicle chassis and accelerating wear on output seals.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.101.401 |
| Material | GJL-250 Cast Iron (GG25) |
| Weight | 18.7 kg (41.2 lbs) |
| Length | 485 mm |
| Width | 320 mm |
| Height | 290 mm |
| Bolt Hole Pattern | 8 x M12 on 150 mm PCD |
| OEM Reference | ZF 4616.101.401 |
Compatibility
This transmission housing is engineered specifically for the ZF WG 65 series of powershift transmissions. It is compatible with the following ZF models: WG65, WG80, WG100, WG120, WG150, WG180, WG200, and WG250. The housing accommodates all standard bolt patterns for the WG series, making it a direct replacement for units manufactured between 2005 and 2023. Always verify the casting number on your existing housing before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | Transmission Housing | Alternate housing variant for WG65 |
| 0636011038 | Hexagon Screw | M12 x 40 mm bolt for housing flange |
| 0636011118 | Hexagon Screw | M14 x 50 mm bolt for bell housing |
| 0636016015 | Hexagon Screw | M16 x 60 mm bolt for rear cover |
| 0631306085 | Cylindrical Pin | Alignment pin for housing dowels |
| 0634313118 | O-Ring | Seals housing-to-cover interface |
| 0636304019 | Screw Plug | M18 x 1.5 drain plug for housing |
| 0634801152 | Sealing Ring | Copper washer for plug seal |
| 0732611049 | Filter Insert | Internal oil filter for housing sump |
| 0634303718 | O-Ring | Seals filter cover to housing |
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