Overview
The ZF 4657.201.155 HOUSING REAR PART is a critical structural component within the WG210 series transmission. This OEM genuine part encloses the rear planetary gear set and output shaft assembly, providing precise alignment and sealing for the hydraulic circuit. As the terminal housing section, it directly supports the output flange and absorbs torsional loads during operation. The SKU 4657.201.155 is machined from high-strength cast iron to withstand continuous thermal cycling and mechanical stress. It interfaces directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form the complete transmission casing assembly.
Symptoms of Failure
- Rear main seal oil leaks – When the housing rear part warps or cracks, transmission fluid seeps past the output seal, leaving puddles under the driveline.
- Output shaft end-play or vibration – Worn bearing bores in the housing cause excessive axial movement, leading to driveline shudder during acceleration.
- Gear engagement delay or slipping – Internal cracks disrupt oil gallery pressure, causing delayed clutch pack application in reverse and low gears.
- Metallic debris in the pan – Spalling from the housing’s bearing race surfaces contaminates the fluid, accelerating wear on the HOUSING REAR SECTION.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.201.155 |
| Material | GJL-250 Cast Iron |
| Weight | 8.4 kg (18.5 lbs) |
| Overall Length | 245 mm |
| Bolt Hole Pattern | 12x M10 on 180 mm PCD |
| OEM Reference | ZF 4657.201.155 |
| Seal Bore Diameter | 85.0 mm ±0.05 |
Compatibility
This housing rear part is engineered for the ZF WG210 series, but it also fits select models in the WG180, WG200, and WG250 families due to shared bolt patterns and oil gallery layouts. It is not interchangeable with the earlier WG120 series. Always verify the casting number against your existing CYLINDRICAL PIN alignment holes before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101058 | TRANSMISSION HOUSING | Main casing for gear train |
| 4657201154 | HOUS.FRONT SECT | Front section of transmission housing |
| 4657298094 | HOUSING REAR SECTION | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M10 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Retains oil pump assembly |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil sump |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M12 bolt for rear housing |
| 4656301048 | OIL FEED.HOUSG. | Pressurized oil supply channel |
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