Overview
The ZF 4656.183.302 LOOSE PARTS for WG171 is a critical internal assembly kit designed to restore precise hydraulic control and mechanical integrity within the WG 171 series transmission. This OEM genuine part, identified by SKU 4656.183.302, functions as a collection of wear-prone components that manage fluid routing and pressure regulation between the main gear sets and the valve body. Without this kit, the transmission cannot maintain consistent clutch engagement or proper lubrication flow. It sits directly adjacent to the 4656101028: TRANSMISSION HOUSING and interfaces with the 4656301066: HOUS.FRONT SECT to create a sealed pressure chamber.
Symptoms of Failure
When the ZF 4656.183.302 LOOSE PARTS degrades, operators often notice delayed forward engagement when shifting from neutral, a classic sign of internal leakage. Another common failure symptom is erratic shift timing under load, where the transmission hunts between gears on moderate inclines. You may also detect low hydraulic pressure warnings on the dash display, indicating that the kit’s seals or spacers have fatigued. Finally, visible oil seepage around the front bell housing can occur if the included fasteners lose torque, compromising the seal against the 4656201015: SCREEN SHEET and the 4656301037: TUBE assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4656.183.302 |
| Material Composition | Steel alloy with nitrile rubber seals |
| Overall Length | 185 mm (estimated) |
| Outer Diameter | 120 mm (estimated) |
| Weight | 1.4 kg (3.1 lbs) |
| OEM Reference | ZF WG171 Series |
| Thread Pitch | M10 x 1.5 (cap screws) |
Compatibility
This OEM genuine part is engineered primarily for the ZF WG 171 transmission series. It also shares dimensional compatibility with the WG 180 and WG 200 models due to identical housing bolt patterns and valve body interfaces. For installations in WG 150 or WG 250 variants, verify the clearance with the 4656301042: HOUSING REAR PART before ordering. The kit is not backward-compatible with pre-2005 ZF 4HP series units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4656301066 | HOUS.FRONT SECT | Front section enclosing torque converter |
| 4656201015 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301037 | TUBE | Fluid transfer conduit between sections |
| 0634313514 | O-RING | Seals fluid passages against leakage |
| 0636100803 | CAP SCREW | Fastener for housing retention |
| 4656301042 | HOUSING REAR PART | Rear casing for output shaft support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise assembly |
| 0636100801 | CAP SCREW | Bolt for front section attachment |
| 0636100160 | CAP SCREW | Fastener for valve body mounting |
Frequently Asked Questions
Q: Can I install the 4656.183.302 kit without removing the transmission from the vehicle?
A: No. This kit requires full transmission disassembly to access the internal valve body and housing interface. You must separate the TRANSMISSION HOUSING from the HOUS.FRONT SECT to replace these loose parts.
Q: What torque specification should I use for the included cap screws?
A: Use 45 Nm (33 ft-lbs) for the M10 cap screws. Over-torquing can distort the SCREEN SHEET and cause fluid bypass.
Q: Does this kit include the O-ring for the tube connection?
A: Yes. The 4656.183.302 kit contains the 0634313514: O-RING and the 0636100803: CAP SCREW for securing the TUBE assembly.
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Phone: +86 158 2286 3467 |
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