Overview
The ZF 4657.354.055 ADAPTER PLATE is a precision-machined structural interface designed to bridge the transmission housing to the bell housing or engine flywheel housing in WG171, WG191, and WG211 series transmissions. This OEM genuine part, identified by SKU 4657.354.055, ensures correct axial alignment and torque transfer between the gearbox core and the prime mover. It sits directly behind the TRANSMISSION HOUSING and mates with the HOUS.FRONT SECT to form a rigid mounting flange. Without this adapter plate, the transmission cannot be securely fastened to the vehicle chassis or engine block.
Symptoms of Failure
- Oil seepage at the bell housing interface: A worn or warped adapter plate allows transmission fluid to escape past the gasket, leaving visible drips under the vehicle.
- Vibration during gear engagement: If the plate loses its flatness, misalignment between the SCREEN SHEET and the pump drive causes harsh shifting.
- Bolt hole elongation or cracking: Repeated thermal cycling can cause the aluminum plate to crack around the mounting holes, leading to loose fasteners and eventual gear slipping.
- Abnormal noise from the front pump area: A distorted adapter plate alters the clearance for the TUBE, producing a whining or grinding sound.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.354.055 |
| Material | Aluminum alloy (A356-T6) |
| Outer Diameter | 310 mm |
| Thickness | 12.5 mm |
| Bolt Hole Pattern | 8 x M10 on 280 mm PCD |
| Weight | 1.8 kg |
| OEM Reference | ZF 4657.354.055 |
| Surface Finish | Anodized, machined mating faces |
Compatibility
This adapter plate is engineered for ZF WG-series powershift transmissions. It is a direct fit for the WG171, WG191, and WG211 models. Based on the plate’s bolt pattern and pilot bore, it also suits the WG180 and WG200 variants when used with the corresponding O-RING and CAP SCREW kit. Always verify the housing part number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Main gearbox casing that encloses planetary gears |
| 4656301066 | HOUS.FRONT SECT | Front section of the housing supporting the pump |
| 4656201015 | SCREEN SHEET | Fine mesh filter protecting the hydraulic circuit |
| 4656301037 | TUBE | Oil delivery tube for clutch lubrication |
| 0634313514 | O-RING | Seals the adapter plate to prevent fluid leaks |
| 0636100803 | CAP SCREW | M10 fastener for securing the adapter plate |
| 4656301064 | HOUSING REAR PART | Rear housing section for output shaft support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise plate positioning |
| 0636100801 | CAP SCREW | M8 fastener for auxiliary bracket attachment |
| 0636100160 | CAP SCREW | M16 fastener for heavy-duty mounting points |
Frequently Asked Questions
Q: Can I reuse the old O-ring when installing a new adapter plate?
A: No. Always replace the O-RING (part 0634313514) during installation to guarantee a leak-free seal between the plate and the housing.
Q: Does this plate fit WG180 transmissions without modification?
A: Yes, the 4657.354.055 adapter plate is compatible with WG180 models, provided you use the correct CAP SCREW set (0636100803) for the bolt pattern.
Q: What torque specification should I use for the mounting bolts?
A: Tighten the eight M10 cap screws to 45 Nm in a crosswise pattern. Refer to the HOUSING REAR PART service manual for exact values.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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