Overview
The ZF 4656.183.187 LOOSE PARTS kit is a critical service component designed specifically for the WG 160 transmission series. This genuine OEM assembly contains the essential fasteners, seals, and positioning elements required to secure internal transmission housings and fluid passages during a rebuild or major repair. The SKU 4656.183.187 is often ordered alongside a new TRANSMISSION HOUSING to ensure all mounting hardware meets factory torque specifications. Without this loose parts set, the structural integrity of the gear train and hydraulic circuit cannot be guaranteed.
Symptoms of Failure
- External oil seepage at housing joints: When the fasteners in this kit fatigue, the seal between the HOUS.FRONT SECT and the main case weakens, causing visible fluid drips.
- Intermittent gear slipping under load: Loose mounting hardware allows micro-movement of the HOUSING REAR PART, misaligning clutch packs and causing torque loss.
- Abnormal vibration during shifting: Worn locating pins or bolts from the 4656.183.187 set can create play in the HOUSING REAR PART, leading to driveline shudder.
- Increased transmission operating temperature: Improperly seated housing sections restrict oil flow, causing overheating in the WG160.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.183.187 |
| Material Composition | Steel (fasteners), Nitrile (seals) |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| Kit Contents | Bolts, washers, dowel pins, O-rings |
| OEM Reference | ZF WG160 Series |
Compatibility
This genuine ZF loose parts kit is engineered for the WG 160 transmission family. While primarily designed for the WG160, the 4656.183.187 also fits select variants of the WG180 and WG200 series where the rear housing interface matches the WG160 footprint. Always verify your transmission’s serial number against the TRANSMISSION HOUSING casting numbers to confirm fitment. The kit is not backward-compatible with older WG120 models.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101031 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4656201036 | HOUSING REAR PART | Rear section supporting output shaft |
| 4472239179 | HOUSING REAR PART | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Retains bearing and shaft position |
| 0636100817 | CAP SCREW | M10 bolt for housing attachment |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M8 bolt for cover plate |
Frequently Asked Questions
Q: Can I reuse the old bolts from my WG160 instead of buying the 4656.183.187 kit?
A: ZF engineering recommends against reusing torque-to-yield fasteners. The 4656.183.187 LOOSE PARTS kit provides new bolts and seals that restore factory clamping force, preventing oil leaks and housing shift.
Q: Does this kit include the gasket for the rear housing?
A: Yes. The 4656.183.187 set contains the O-rings and sealing washers needed for both the HOUSING REAR PART and the HOUSING REAR PART interfaces.
Q: How do I verify if my transmission uses the WG160 housing pattern?
A: Check the casting number on the TRANSMISSION HOUSING. If it ends in 1031, the 4656.183.187 kit is the correct service part.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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