Overview
The ZF 4657.183.369 LOOSE PARTS kit is a critical service component engineered specifically for the WG 190 series transmission. This genuine OEM assembly contains the essential fasteners, seals, and positioning elements required to secure the main housing sections during a rebuild or overhaul. Located at the primary structural interface of the gearbox, this kit ensures that the TRANSMISSION HOUSING maintains proper alignment with the HOUS.FRONT SECT and the HOUSING REAR PART. The SKU 4657.183.369 is your direct OEM replacement for restoring factory clamp load and preventing fluid migration between cavities.
Symptoms of Failure
- External oil seepage at the main case split line: When the loose parts kit degrades, the clamping force between the HOUSING REAR SECTION and the front section weakens, causing ATF to weep under load.
- Intermittent gear engagement hesitation: Worn positioning pins or bolts allow micro-movement of the housing halves, leading to misalignment of the clutch drum and planetary gear sets.
- Increased driveline vibration during torque converter lockup: Loose structural fasteners fail to dampen harmonic resonance, transmitting harshness through the chassis.
- Contaminated transmission fluid from debris ingress: Failed seals within the kit permit road grit and moisture to enter the bell housing area, accelerating internal wear.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4657.183.369 |
| Kit Contents | Bolts, dowel pins, sealing washers, lock plates |
| Material Composition | Case-hardened steel (fasteners), nitrile rubber (seals) |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Thread Pitch (primary bolts) | M10 x 1.5 |
| Torque Specification | 45 Nm + 90° (angle tighten) |
| OEM Reference | ZF Friedrichshafen AG |
Compatibility
This genuine loose parts kit is designed for the ZF WG 190 series, but its fastening geometry also applies to the structurally similar WG 180 and WG 200 models. It is the correct service part for any WG-family transmission that uses a three-piece housing architecture comprising the main case, front section, and rear section. Always verify the housing casting numbers before ordering; the 4657.183.369 kit is not compatible with the earlier WG 150 series or the heavy-duty WG 250 series without adapter plates.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101079 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4657201166 | HOUS.FRONT SECT | Forward bell housing section |
| 4657201169 | HOUSING REAR PART | Rear structural cover |
| 4657298104 | HOUSING REAR SECTION | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M10 hex head bolt for housing |
| 4656301148 | FIXING PLATE | Anti-rotation lock for bolts |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil pump |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M8 bolt for accessory bracket |
Frequently Asked Questions
Q: Can I reuse the old bolts from my ZF WG190 instead of buying the 4657.183.369 kit?
A: No. ZF specifies that all structural fasteners in this kit are torque-to-yield and must be replaced with new OEM parts to maintain proper clamp load and prevent housing distortion.
Q: Does this kit include the sealing gasket for the housing joint?
A: The 4657.183.369 LOOSE PARTS kit contains the fasteners and dowel pins only. You must order the appropriate housing gasket separately based on your transmission serial number.
Q: How do I know if my WG190 needs this kit during a rebuild?
A: If you are separating the HOUS.FRONT SECT from the main case for any reason, this kit is mandatory. Look for stripped threads or corrosion on the original bolts as a clear indicator of wear.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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