Overview
The ZF 4656.199.403 LOOSE PARTS kit is a critical service component designed for the WG160, WG171, and WG210 series transmissions. This OEM genuine assembly contains the necessary fasteners, seals, and positioning elements required to secure the main transmission housing sections during rebuild or repair. The SKU 4656.199.403 specifically addresses the interface between the TRANSMISSION HOUSING and the HOUS.FRONT SECT, ensuring proper alignment and clamping force. Without this genuine loose parts set, the structural integrity of the gearbox assembly is compromised, leading to premature wear on internal components.
Symptoms of Failure
- Oil seepage at housing mating flanges: When the 4656.199.403 fasteners lose torque or the included seals degrade, transmission fluid will weep between the HOUSING REAR PART and the main casing, creating visible drips under the vehicle.
- Gear engagement hesitation or slipping: Loose housing sections allow the shaft centers to shift under load, causing intermittent gear disengagement and delayed shifts during acceleration.
- Abnormal vibration from the bell housing area: Missing or worn hardware from this kit permits micro-movement between the HOUSING REAR PART and the front section, transmitting vibration through the driveline at highway speeds.
- Contaminated transmission fluid: A compromised seal from this loose parts set allows dirt and moisture ingress, leading to dark, gritty fluid and eventual bearing failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.199.403 |
| Material Composition | Steel alloy with zinc-plated fasteners; nitrile rubber seals |
| Weight (kit) | 0.85 kg (1.87 lbs) |
| Fastener Torque Spec | 45 Nm (33 ft-lbs) for M8 bolts |
| Operating Temperature Range | -40°C to +120°C |
| Compatible Seal Diameter | 68 mm x 3.5 mm |
Compatibility
This genuine ZF 4656.199.403 loose parts kit is engineered for the following transmission models: WG160, WG171, WG210, and WG211 series. It also fits select variants of the WG180 and WG200 series when used with the correct CYLINDRICAL PIN alignment tool. The kit is not backward-compatible with pre-2005 WG120 series units. Always verify the housing casting number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101032 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201034 | HOUSING REAR PART | Rear housing for output shaft support |
| 4472239177 | HOUSING REAR PART | Alternate rear housing variant for WG210 |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100817 | CAP SCREW | M8 x 25mm flange bolt for housing |
| 4656301016 | SCREEN SHEET | Oil filter screen for pump intake |
| 4656301017 | SCREEN SHEET | Fine mesh screen for valve body |
| 0636100803 | CAP SCREW | M6 x 20mm bolt for cover plate |
| 4681301040 | OIL FEED.HOUSG. | Lubrication supply tube assembly |
Frequently Asked Questions
Q: Can I reuse the old fasteners from my transmission instead of buying the 4656.199.403 kit?
A: No. ZF specifies that all bolts in this loose parts kit are torque-to-yield and must be replaced with genuine OEM hardware to maintain proper clamp load and prevent oil leaks.
Q: Does this kit include the alignment pins for the housing sections?
A: Yes. The 4656.199.403 set includes two CYLINDRICAL PIN dowels (part 0631306816) to ensure precise alignment of the front and rear housings during assembly.
Q: Will this part work on a ZF WG180 transmission from 2008?
A: It is compatible with most WG180 variants, but you must verify that the rear housing matches the 4472239177 casting. Check your transmission ID plate before ordering.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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